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Papers by abhinav sao
International journal of advanced biochemistry research, 2024
Genetic variability is crucial for effective selection and breeding in rice improvement programs.... more Genetic variability is crucial for effective selection and breeding in rice improvement programs. This study assesses the genetic variability parameters for yield and its contributing traits in rice hybrids using 25 cross combinations, including parents, and checks. was studied at IGKV Raipur, Chhattisgarh for 13 characteristics. In this analysis depicts higher estimates of GCV and PCV observed for grain yield per plant, biological yield per plant, total tillers per plant, and effective tillers per plant. The high value of Phenotypic coefficient of variance than Genotypic coefficient of variance indicates influence of environment. Moderate values of GCV and PCV were noticed in plant height, harvest index, 1000 seed weight, number of filled spikelets per panicle and the total number of spikelets per panicle. Lower estimates were recorded for spikelet fertility (%), days to 50% flowering, and days to maturity. The PCV was generally higher than the GCV, and showed less influence of environment for the expression of yield traits. High heritability was observed for traits like biological yield per plant, total tillers per plant, total number of spikelets per panicle, grain yield per plant, number of filled spikelets per panicle, 1000 seed weight, effective tillers per plant, spikelet fertility (%), plant height, harvest index, days to 50% flowering, panicle length, and days to maturity. Genetic advance as a percentage of mean was also found higher for grain yield per plant, biological yield per plant, total tillers per plant, effective tillers per plant, plant height, harvest index, 1000 seed weight, number of filled spikelets per panicle, and total number of spikelets per panicle. Moderate genetic advance was observed for panicle length and spikelet fertility (%). Lower genetic advance was observed for days to 50% flowering and days to maturity. Traits with high heritability and high genetic advance as a percentage of mean are likely controlled by additive gene action, making them suitable for selection and genetic improvement. Traits with high heritability but moderate genetic advance may involve both additive and non-additive gene actions. Recommending these potential lines for genetic improvement through selection. The findings provide valuable insights for breeders aiming to enhance crop performance through targeted trait selection and breeding strategies.
Journal of advances in biology & biotechnology, Mar 6, 2024
International journal of plant and soil science, Feb 7, 2024
Genetic variability parameters were studied in 2879 germplasm accessions of rice for 11 quantitat... more Genetic variability parameters were studied in 2879 germplasm accessions of rice for 11 quantitative traits. Moderate value of genotypic coefficient of variation (GCV) and phenotypic coefficient variation (PCV) was observed for the traits, 100 seed weight, seedling height, L:B ratio, plant height, and number of effective tillers, whereas rest of the traits had low GCV and PCV values. High heritability was observed for all the traits except leaf length, leaf width and grain yield per plant. High heritability coupled with high genetic advance as percent of mean was observed for 100 seed weight, seedling height and L:B ratio. High heritability coupled with moderate genetic advance as percent of mean was recorded for days to 50% flowering and plant height. The presence of high heritability and high genetic advance as percent of the mean indicated the presence of additive gene effects for controlling aforesaid traits, hence selection in later generations will be rewarding in a breeding programme.
ASIAN JOURNAL OF BIO SCIENCE, 2018
A wide range of phenotypic, genotypic and environmental coefficient of variation was observed for... more A wide range of phenotypic, genotypic and environmental coefficient of variation was observed for most of the characters. Maximum phenotypic and genotypic coefficient of variation was recorded for panicle bearing tillers per plant followed by grain yield, test weight, number of total tillers per plant, spikelets fertility percentage, plant height, total spikelets per panicle and days to 50 per cent flowering. The range of broad sense heritability (h 2 b) was obtained from (72.82%) panicle length to (99.64%) spikelets fertility percentage. The genetic advance in absolute terms hanged from 2.87 for panicle length to 34.25 for spikelets fertility percentage. High genetic advance was observed for spikelets fertility percentage followed by panicle length.
Journal of Oilseeds Research
The present study was conducted to evaluate the stability of 41 genotypes with respect to various... more The present study was conducted to evaluate the stability of 41 genotypes with respect to variousmorphophysiological traits affecting water use efficiency in sunflower. The four water stress environments werecreated by skipping irrigation at different plant growth stages. The data were recorded for canopy temperature (°C),photosynthetic capacity, leaf area index, leaf water potential (mpa), days to 50% flowering, days to maturity, plantheight (cm), head diameter (cm), 100-seed weight (g), seed yield/plant (g) and oil content (%). The analysis ofvariance revealed that the genotypes and environment (linear) showed significant interaction for all the traits understudy which indicated that phenotypic expression of all the genotypes for these characters was influencedsignificantly by environments. The pooled deviations for all the characters were significant indicating that theperformance of genotypes varied in different environments. The phenotypic stability of genotypes was measuredby ...
Electronic Journal of Plant Breeding, 2010
Genetical studies on fruit yield per plant and its attributing traits alongwith quality traits li... more Genetical studies on fruit yield per plant and its attributing traits alongwith quality traits like total soluble solids (TSS) and rind thickness were conducted following line x tester mating design comprising of 8 lines and 6 testers at Horticulture Research Farm, Indira Gandhi Agricultural University, Raipur. The analysis revealed that all the parents were found good general combiners for most of the characters. However, line IGBO 65 and tester KS 327 were found best combiners for fruit yield per plant. The ratio of gca variance/ sca variance were observed less than unity for all the characters which revealed the predominance of non-additive gene action. The hybrid, IGBL 70 X PPL was found best on the basis of specific combining ability and heterosis for fruit yield per plant. A high magnitude of heterosis (115.84%) for fruit yield per plant over better parent was observed. There was high heterosis response in most of the hybrids which supports the role of non-additive gene effects. The heterosis in relation to combining ability for quality parameters i.e. TSS and rind thickness were also found significantly high in the respective hybrids, IGBO 40 X KS 331 and IGBR 44 X IVBL 9. Indirect selection for traits such as, plant height, fruits per plant, fruit length, fruit girth and branches per plant could be done in order to achieve higher yield through heterosis breeding in brinjal.
European Journal of Biotechnology and Bioscience, Jul 1, 2016
The rainfed experiment was conducted in S. G. College of Agriculture and Research Station, Jagdal... more The rainfed experiment was conducted in S. G. College of Agriculture and Research Station, Jagdalpur in Kharif 2013-14 for understand the genetic behavior of old but newly popularized cereal crop Ragi (Eleusine coracana). Days to maturity was found to be positively influenced by plant height (0.2819**), main ear length (0.2295**), numbers of fingers per ear (0.3174**) and, obviously, the days to flowering (0.7193**). Fodder yield had positive and significant association with plant height (0.2301*), number of productive tillers per plant (0.2828**), main ear length (0.2716*) and grain yield (0.4622**). Indirect effect of fodder yield was chiefly contributed by numbers of productive tillers per plants (0.1056), main ear length (0.1014) and plant height (0.0882).the productive tillers per plant had direct positive effect (0.2823) on grain yield and total indirect effect was about 0.2916 through main ear length (0.1001), fodder yield (0.0798), number of fingers per ear and days to maturity (0.0316).
Electronic Journal of Plant Breeding, 2016
A study of phenotypic stability of 30 finger millet genotypes was conducted to assess genotype-en... more A study of phenotypic stability of 30 finger millet genotypes was conducted to assess genotype-environment interaction (GEI) and identify stable finger millet (Eleusine coracana (L.) Gaertn. subsp. coracana) genotypes for grain yield across four diverse locations in India. Genotypes, environments main effects and GEI were significant at P < 0.01. Different stability measures identified different wide adaptable genotypes. The parameters Wi 2 , σi 2 , Si (1) and Si (2) identified TNEC
The present investigation was undertaken in the Department of Plant Breeding and Genetics, Punjab... more The present investigation was undertaken in the Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab to evaluate 41 genotypes of sunflower (Helianthus annuus L) for morphological and yield traits affecting water use efficiency under different water stress environments. The traits under study were days to 50 per cent flowering, days to maturity, plant height, head diameter, seed yield per plant, 100-seed weight and oil content. Analysis of variance revealed significant differences due to genotypes and environments for all the characters under study. Among the four environments W1 (control) yielded the maximum value for all the parameters followed by W4 (withholding of irrigation at anthesis completion stage and thereafter complete withholding of irrigation after soft dough stage), W3 (withholding of irrigation at 50 per cent flowering stage and soft dough stage thereafter complete withholding of irrigations after hard dough stage) and W2 (withholding of 2nd irrigation ie before button stage and thereafter complete withholding of irrigation after soft dough stage). The estimates of heritability and genetic advance were found maximum for seed yield per plant followed by 100-seed weight indicating the predominance of additive gene effects. Hence this trait can be improved to a considerable extent by limited selection cycles. Estimation of GCV and PCV values were also higher for seed yield per plant as compared to other traits indicating high genetic variability for this trait. The genotypes P-87-R, P-93-R, P-100-R and P-110-R were identified as water use efficient genotypes. The stress environment W4 (withholding of irrigation at anthesis completion stage and thereafter complete withholding of irrigation after soft dough stage) could be considered as good as the control to realize maximum yield in sunflower..
Vegetable Science, Oct 26, 2010
to assess the extent of heterosis and inbreeding depression in brinjal. The study revealed that t... more to assess the extent of heterosis and inbreeding depression in brinjal. The study revealed that the expression of high degree of heterosis i.e. relative heterosis, heterobeltiosis and standard heterosis by most of the F1's for yield and its contributing traits which supports the role of non-additive gene effects. Similarly, inbreeding depression was estimated to a high degree in many F1's for yield and related characters indicating the early generation selection for fruit yield in brinjal. In order of merit F1 hybrids, IGBL 70 x PPL, IGBO 40 x KS 327, IGBO 83 x KS 327, IGBO 40 x IVBL 9 and IGBO 43 x KS 331 exhibited highly significant heterosis for fruit yield and related traits. The degree of heterosis was estimated to 162.98 %, 139.13 % and 127.41 % as relative heterosis, heterobeltiosis and standard heterosis, respectively for marketable fruit yield per plant. A high degree of inbreeding depression was found in IGBO 40 x KS 327 (55.22 %) indicated the exploitation of heterosis in this cross, whereas negative value of inbreeding depression for IGBO 43 x IVBL 9 suggests its selection in later generation for fruit yield per plant.
Jordan Journal of Agricultural Sciences, Aug 19, 2010
Combining ability study was carried out on Rice (Oryza sativa L.) during the wet season of 2000 a... more Combining ability study was carried out on Rice (Oryza sativa L.) during the wet season of 2000 and 2001 by following the line x tester analysis in the research farm Department of Plant Breeding and Genetics, Indira Gandhi Agricultural University, Raipur, India for plant height, panicle length, total number of productive tiller per plant, total number of spikelet per panicle, total number of filled spikelet per panicle, total number of chaffy spikelet per panicle, spikelet fertility percentage, pollen sterility percentage, 100-grain weight and grain yield per plant, involving four CMS (Cytoplasmic Male Sterile) lines, 13 testers and resulting 52 rice hybrids (cross combinations). The analysis revealed the predominance of non-additive gene action for all the characters under study. This suggests the possibility of exploiting heterosis in the present material. Among the CMS lines studied, DRR 22A was a good general combiner for plant height, CMS line IR 62829A was a good general combiner for the total number of spikelets per panicle and grain yield per plant, CMS line IR 67684A was also good general combiner for total number of productive tiller per plant, total number of filled spikelet per panicle, spikelet fertility percentage and pollen sterility percentage whereas CMS line IR 68899A was rated as good general combiner for total number of chaffy spikelet per panicle. Tester Swarna was found best general combiner for grain yield per plant. Eight cross combinations exhibited high SCA (Specific Combining Ability) effects for grain yield per plant. These crosses were found to involve at least one parent with high GCA (General Combining Ability) effect and other parents having either high or low GCA effect indicating the involvement of additive as well as non-additive gene action operating in these crosses.
Advance Research Journal of Crop improvement, Dec 15, 2016
Bastar plateau of Chhattisgarh state along with five check varieties were studied for genetic div... more Bastar plateau of Chhattisgarh state along with five check varieties were studied for genetic diversity on the basis of nineteen quantitative characters using Euclidian distance between genotypes. This analysis allowed the 105 genotypes of rice to be identified into ten distinct clusters. Among the different clusters, cluster III contained maximum of 46 genotypes and cluster I, II and X contained a minimum of 1 genotype each. Cluster I was characterized by highest mean value for number of effective tillers per hill, spikelet fertility and grain length breadth ratio. Cluster VII had highest mean value for harvest index. The cluster VIII was characterized by highest mean value for flag leaf length, panicle length, number of fertile spikelets per panicle and total number of grains per panicle. The cluster IX was characterized by highest mean value for grain yield per plant, days to 50 per cent flowering, days to maturity, plant height, test weight and grain breadth. The highest inter cluster distance was observed between cluster II and VIII while the lowest between III and IX. The lowest intra cluster distance was observed in cluster I, II and X while highest intra cluster distance was observed in cluster IX. There is good scope to bring about genetic improvement in rice through hybridization and selection by crossing accessions from different clusters.
Asian Journal of Bioscience, Oct 15, 2015
In present investigation, 18 new genotypes were tested for upland rainfed ecology during Kharif 2... more In present investigation, 18 new genotypes were tested for upland rainfed ecology during Kharif 2013 and 2014, to identify promising genotypes and formulate phenological relationships at phenotypic and genotypic levels with uncertain weather parameters. The test populations exhibited enough variation to carry on crop breeding research however, genotypes responded differentially to water stress and late season drought with respect to morphological and yield traits. Considering genetic secondary productivity factors (SGPF), days to flowering, plant height, panicles per unit area, spikelet fertility and harvest index was observed to be major contributors for water scarce survivals. Days to flowering was found to be negatively associated with grain yield (-0.1941,-0.2986*,-0.2586 for Kharif 2013, 2014 and pooled over environment, respectively). Grain yield was positively and significantly associated with total crop biomass (0.6669**, 0.6122**, 0.6185**), plant height (0.5059**, 0.4145**, 0.4541**) and crop duration. Biased selection for earliness cause reduction in grain yield due to shortened vegetative phase hence, research is to be focused to minimize the yield penalty associated with earliness.
Electronic Journal of Plant Breeding, 2015
International Journal of Plant and Soil Science, Jul 14, 2023
This study aimed to investigate the correlations among yield and yield component traits and estim... more This study aimed to investigate the correlations among yield and yield component traits and estimate the direct and indirect effects of these traits on grain yield in rice. The experiment was conducted during kharif 2022. Correlation coefficients and path coefficients were analyzed to determine the relationships between these traits and seed yield. The results showed significant positive correlations between seed yield and traits such as effective tillers per plant, total tillers per plant, number of filled grains, spikelet fertility, biological yield, harvest index, and 100 seed weight. The genotypic correlations were slightly higher than the corresponding phenotypic correlations. Path coefficient analysis revealed that biological yield had the maximum direct effect on seed yield, followed by harvest index, panicle length, and number of filled grains per panicle, plant height, and effective tillers per plant, 100 seed weight, and days to 50% flowering. These findings provide valuable information for selecting superior cross combinations in hybrid rice breeding programs to improve grain yield.
![Research paper thumbnail of Genetic Diversity Estimation in Horsegram [Macrotyloma uniflorum (L) Verdcout] Genotypes Collected from Bastar Plateau](https://attachments.academia-assets.com/108149007/thumbnails/1.jpg)
](International Journal of Current Microbiology and Applied Sciences, Dec 10, 2019
Indian Journal of Genetics and Plant Breeding, 2016
International journal of advanced biochemistry research, 2024
Genetic variability is crucial for effective selection and breeding in rice improvement programs.... more Genetic variability is crucial for effective selection and breeding in rice improvement programs. This study assesses the genetic variability parameters for yield and its contributing traits in rice hybrids using 25 cross combinations, including parents, and checks. was studied at IGKV Raipur, Chhattisgarh for 13 characteristics. In this analysis depicts higher estimates of GCV and PCV observed for grain yield per plant, biological yield per plant, total tillers per plant, and effective tillers per plant. The high value of Phenotypic coefficient of variance than Genotypic coefficient of variance indicates influence of environment. Moderate values of GCV and PCV were noticed in plant height, harvest index, 1000 seed weight, number of filled spikelets per panicle and the total number of spikelets per panicle. Lower estimates were recorded for spikelet fertility (%), days to 50% flowering, and days to maturity. The PCV was generally higher than the GCV, and showed less influence of environment for the expression of yield traits. High heritability was observed for traits like biological yield per plant, total tillers per plant, total number of spikelets per panicle, grain yield per plant, number of filled spikelets per panicle, 1000 seed weight, effective tillers per plant, spikelet fertility (%), plant height, harvest index, days to 50% flowering, panicle length, and days to maturity. Genetic advance as a percentage of mean was also found higher for grain yield per plant, biological yield per plant, total tillers per plant, effective tillers per plant, plant height, harvest index, 1000 seed weight, number of filled spikelets per panicle, and total number of spikelets per panicle. Moderate genetic advance was observed for panicle length and spikelet fertility (%). Lower genetic advance was observed for days to 50% flowering and days to maturity. Traits with high heritability and high genetic advance as a percentage of mean are likely controlled by additive gene action, making them suitable for selection and genetic improvement. Traits with high heritability but moderate genetic advance may involve both additive and non-additive gene actions. Recommending these potential lines for genetic improvement through selection. The findings provide valuable insights for breeders aiming to enhance crop performance through targeted trait selection and breeding strategies.
Journal of advances in biology & biotechnology, Mar 6, 2024
International journal of plant and soil science, Feb 7, 2024
Genetic variability parameters were studied in 2879 germplasm accessions of rice for 11 quantitat... more Genetic variability parameters were studied in 2879 germplasm accessions of rice for 11 quantitative traits. Moderate value of genotypic coefficient of variation (GCV) and phenotypic coefficient variation (PCV) was observed for the traits, 100 seed weight, seedling height, L:B ratio, plant height, and number of effective tillers, whereas rest of the traits had low GCV and PCV values. High heritability was observed for all the traits except leaf length, leaf width and grain yield per plant. High heritability coupled with high genetic advance as percent of mean was observed for 100 seed weight, seedling height and L:B ratio. High heritability coupled with moderate genetic advance as percent of mean was recorded for days to 50% flowering and plant height. The presence of high heritability and high genetic advance as percent of the mean indicated the presence of additive gene effects for controlling aforesaid traits, hence selection in later generations will be rewarding in a breeding programme.
ASIAN JOURNAL OF BIO SCIENCE, 2018
A wide range of phenotypic, genotypic and environmental coefficient of variation was observed for... more A wide range of phenotypic, genotypic and environmental coefficient of variation was observed for most of the characters. Maximum phenotypic and genotypic coefficient of variation was recorded for panicle bearing tillers per plant followed by grain yield, test weight, number of total tillers per plant, spikelets fertility percentage, plant height, total spikelets per panicle and days to 50 per cent flowering. The range of broad sense heritability (h 2 b) was obtained from (72.82%) panicle length to (99.64%) spikelets fertility percentage. The genetic advance in absolute terms hanged from 2.87 for panicle length to 34.25 for spikelets fertility percentage. High genetic advance was observed for spikelets fertility percentage followed by panicle length.
Journal of Oilseeds Research
The present study was conducted to evaluate the stability of 41 genotypes with respect to various... more The present study was conducted to evaluate the stability of 41 genotypes with respect to variousmorphophysiological traits affecting water use efficiency in sunflower. The four water stress environments werecreated by skipping irrigation at different plant growth stages. The data were recorded for canopy temperature (°C),photosynthetic capacity, leaf area index, leaf water potential (mpa), days to 50% flowering, days to maturity, plantheight (cm), head diameter (cm), 100-seed weight (g), seed yield/plant (g) and oil content (%). The analysis ofvariance revealed that the genotypes and environment (linear) showed significant interaction for all the traits understudy which indicated that phenotypic expression of all the genotypes for these characters was influencedsignificantly by environments. The pooled deviations for all the characters were significant indicating that theperformance of genotypes varied in different environments. The phenotypic stability of genotypes was measuredby ...
Electronic Journal of Plant Breeding, 2010
Genetical studies on fruit yield per plant and its attributing traits alongwith quality traits li... more Genetical studies on fruit yield per plant and its attributing traits alongwith quality traits like total soluble solids (TSS) and rind thickness were conducted following line x tester mating design comprising of 8 lines and 6 testers at Horticulture Research Farm, Indira Gandhi Agricultural University, Raipur. The analysis revealed that all the parents were found good general combiners for most of the characters. However, line IGBO 65 and tester KS 327 were found best combiners for fruit yield per plant. The ratio of gca variance/ sca variance were observed less than unity for all the characters which revealed the predominance of non-additive gene action. The hybrid, IGBL 70 X PPL was found best on the basis of specific combining ability and heterosis for fruit yield per plant. A high magnitude of heterosis (115.84%) for fruit yield per plant over better parent was observed. There was high heterosis response in most of the hybrids which supports the role of non-additive gene effects. The heterosis in relation to combining ability for quality parameters i.e. TSS and rind thickness were also found significantly high in the respective hybrids, IGBO 40 X KS 331 and IGBR 44 X IVBL 9. Indirect selection for traits such as, plant height, fruits per plant, fruit length, fruit girth and branches per plant could be done in order to achieve higher yield through heterosis breeding in brinjal.
European Journal of Biotechnology and Bioscience, Jul 1, 2016
The rainfed experiment was conducted in S. G. College of Agriculture and Research Station, Jagdal... more The rainfed experiment was conducted in S. G. College of Agriculture and Research Station, Jagdalpur in Kharif 2013-14 for understand the genetic behavior of old but newly popularized cereal crop Ragi (Eleusine coracana). Days to maturity was found to be positively influenced by plant height (0.2819**), main ear length (0.2295**), numbers of fingers per ear (0.3174**) and, obviously, the days to flowering (0.7193**). Fodder yield had positive and significant association with plant height (0.2301*), number of productive tillers per plant (0.2828**), main ear length (0.2716*) and grain yield (0.4622**). Indirect effect of fodder yield was chiefly contributed by numbers of productive tillers per plants (0.1056), main ear length (0.1014) and plant height (0.0882).the productive tillers per plant had direct positive effect (0.2823) on grain yield and total indirect effect was about 0.2916 through main ear length (0.1001), fodder yield (0.0798), number of fingers per ear and days to maturity (0.0316).
Electronic Journal of Plant Breeding, 2016
A study of phenotypic stability of 30 finger millet genotypes was conducted to assess genotype-en... more A study of phenotypic stability of 30 finger millet genotypes was conducted to assess genotype-environment interaction (GEI) and identify stable finger millet (Eleusine coracana (L.) Gaertn. subsp. coracana) genotypes for grain yield across four diverse locations in India. Genotypes, environments main effects and GEI were significant at P < 0.01. Different stability measures identified different wide adaptable genotypes. The parameters Wi 2 , σi 2 , Si (1) and Si (2) identified TNEC
The present investigation was undertaken in the Department of Plant Breeding and Genetics, Punjab... more The present investigation was undertaken in the Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab to evaluate 41 genotypes of sunflower (Helianthus annuus L) for morphological and yield traits affecting water use efficiency under different water stress environments. The traits under study were days to 50 per cent flowering, days to maturity, plant height, head diameter, seed yield per plant, 100-seed weight and oil content. Analysis of variance revealed significant differences due to genotypes and environments for all the characters under study. Among the four environments W1 (control) yielded the maximum value for all the parameters followed by W4 (withholding of irrigation at anthesis completion stage and thereafter complete withholding of irrigation after soft dough stage), W3 (withholding of irrigation at 50 per cent flowering stage and soft dough stage thereafter complete withholding of irrigations after hard dough stage) and W2 (withholding of 2nd irrigation ie before button stage and thereafter complete withholding of irrigation after soft dough stage). The estimates of heritability and genetic advance were found maximum for seed yield per plant followed by 100-seed weight indicating the predominance of additive gene effects. Hence this trait can be improved to a considerable extent by limited selection cycles. Estimation of GCV and PCV values were also higher for seed yield per plant as compared to other traits indicating high genetic variability for this trait. The genotypes P-87-R, P-93-R, P-100-R and P-110-R were identified as water use efficient genotypes. The stress environment W4 (withholding of irrigation at anthesis completion stage and thereafter complete withholding of irrigation after soft dough stage) could be considered as good as the control to realize maximum yield in sunflower..
Vegetable Science, Oct 26, 2010
to assess the extent of heterosis and inbreeding depression in brinjal. The study revealed that t... more to assess the extent of heterosis and inbreeding depression in brinjal. The study revealed that the expression of high degree of heterosis i.e. relative heterosis, heterobeltiosis and standard heterosis by most of the F1's for yield and its contributing traits which supports the role of non-additive gene effects. Similarly, inbreeding depression was estimated to a high degree in many F1's for yield and related characters indicating the early generation selection for fruit yield in brinjal. In order of merit F1 hybrids, IGBL 70 x PPL, IGBO 40 x KS 327, IGBO 83 x KS 327, IGBO 40 x IVBL 9 and IGBO 43 x KS 331 exhibited highly significant heterosis for fruit yield and related traits. The degree of heterosis was estimated to 162.98 %, 139.13 % and 127.41 % as relative heterosis, heterobeltiosis and standard heterosis, respectively for marketable fruit yield per plant. A high degree of inbreeding depression was found in IGBO 40 x KS 327 (55.22 %) indicated the exploitation of heterosis in this cross, whereas negative value of inbreeding depression for IGBO 43 x IVBL 9 suggests its selection in later generation for fruit yield per plant.
Jordan Journal of Agricultural Sciences, Aug 19, 2010
Combining ability study was carried out on Rice (Oryza sativa L.) during the wet season of 2000 a... more Combining ability study was carried out on Rice (Oryza sativa L.) during the wet season of 2000 and 2001 by following the line x tester analysis in the research farm Department of Plant Breeding and Genetics, Indira Gandhi Agricultural University, Raipur, India for plant height, panicle length, total number of productive tiller per plant, total number of spikelet per panicle, total number of filled spikelet per panicle, total number of chaffy spikelet per panicle, spikelet fertility percentage, pollen sterility percentage, 100-grain weight and grain yield per plant, involving four CMS (Cytoplasmic Male Sterile) lines, 13 testers and resulting 52 rice hybrids (cross combinations). The analysis revealed the predominance of non-additive gene action for all the characters under study. This suggests the possibility of exploiting heterosis in the present material. Among the CMS lines studied, DRR 22A was a good general combiner for plant height, CMS line IR 62829A was a good general combiner for the total number of spikelets per panicle and grain yield per plant, CMS line IR 67684A was also good general combiner for total number of productive tiller per plant, total number of filled spikelet per panicle, spikelet fertility percentage and pollen sterility percentage whereas CMS line IR 68899A was rated as good general combiner for total number of chaffy spikelet per panicle. Tester Swarna was found best general combiner for grain yield per plant. Eight cross combinations exhibited high SCA (Specific Combining Ability) effects for grain yield per plant. These crosses were found to involve at least one parent with high GCA (General Combining Ability) effect and other parents having either high or low GCA effect indicating the involvement of additive as well as non-additive gene action operating in these crosses.
Advance Research Journal of Crop improvement, Dec 15, 2016
Bastar plateau of Chhattisgarh state along with five check varieties were studied for genetic div... more Bastar plateau of Chhattisgarh state along with five check varieties were studied for genetic diversity on the basis of nineteen quantitative characters using Euclidian distance between genotypes. This analysis allowed the 105 genotypes of rice to be identified into ten distinct clusters. Among the different clusters, cluster III contained maximum of 46 genotypes and cluster I, II and X contained a minimum of 1 genotype each. Cluster I was characterized by highest mean value for number of effective tillers per hill, spikelet fertility and grain length breadth ratio. Cluster VII had highest mean value for harvest index. The cluster VIII was characterized by highest mean value for flag leaf length, panicle length, number of fertile spikelets per panicle and total number of grains per panicle. The cluster IX was characterized by highest mean value for grain yield per plant, days to 50 per cent flowering, days to maturity, plant height, test weight and grain breadth. The highest inter cluster distance was observed between cluster II and VIII while the lowest between III and IX. The lowest intra cluster distance was observed in cluster I, II and X while highest intra cluster distance was observed in cluster IX. There is good scope to bring about genetic improvement in rice through hybridization and selection by crossing accessions from different clusters.
Asian Journal of Bioscience, Oct 15, 2015
In present investigation, 18 new genotypes were tested for upland rainfed ecology during Kharif 2... more In present investigation, 18 new genotypes were tested for upland rainfed ecology during Kharif 2013 and 2014, to identify promising genotypes and formulate phenological relationships at phenotypic and genotypic levels with uncertain weather parameters. The test populations exhibited enough variation to carry on crop breeding research however, genotypes responded differentially to water stress and late season drought with respect to morphological and yield traits. Considering genetic secondary productivity factors (SGPF), days to flowering, plant height, panicles per unit area, spikelet fertility and harvest index was observed to be major contributors for water scarce survivals. Days to flowering was found to be negatively associated with grain yield (-0.1941,-0.2986*,-0.2586 for Kharif 2013, 2014 and pooled over environment, respectively). Grain yield was positively and significantly associated with total crop biomass (0.6669**, 0.6122**, 0.6185**), plant height (0.5059**, 0.4145**, 0.4541**) and crop duration. Biased selection for earliness cause reduction in grain yield due to shortened vegetative phase hence, research is to be focused to minimize the yield penalty associated with earliness.
Electronic Journal of Plant Breeding, 2015
International Journal of Plant and Soil Science, Jul 14, 2023
This study aimed to investigate the correlations among yield and yield component traits and estim... more This study aimed to investigate the correlations among yield and yield component traits and estimate the direct and indirect effects of these traits on grain yield in rice. The experiment was conducted during kharif 2022. Correlation coefficients and path coefficients were analyzed to determine the relationships between these traits and seed yield. The results showed significant positive correlations between seed yield and traits such as effective tillers per plant, total tillers per plant, number of filled grains, spikelet fertility, biological yield, harvest index, and 100 seed weight. The genotypic correlations were slightly higher than the corresponding phenotypic correlations. Path coefficient analysis revealed that biological yield had the maximum direct effect on seed yield, followed by harvest index, panicle length, and number of filled grains per panicle, plant height, and effective tillers per plant, 100 seed weight, and days to 50% flowering. These findings provide valuable information for selecting superior cross combinations in hybrid rice breeding programs to improve grain yield.
International Journal of Current Microbiology and Applied Sciences, Dec 10, 2019
Indian Journal of Genetics and Plant Breeding, 2016