Bachubhai A Monpara | Junagadh Agricultural University, Junagadh (original) (raw)
Papers by Bachubhai A Monpara
Electronic Journal of Plant Breeding, Dec 31, 2014
Variability and selection indices were studied involving 100 germplasm lines of soybean. High her... more Variability and selection indices were studied involving 100 germplasm lines of soybean. High heritability was accompanied by high genetic advance and moderate to high GCV observed for all the characters under consideration, indicating the possibility of improving these traits through selection. Discriminant function analysis indicated that almost all the selection indices were found to be more efficient than straight selection based on seed yield alone. Selection efficiency of the function was improved by increasing number of characters in the index. The index consisting of all the six traits gave the highest genetic gain and selection efficiency. Inclusion of pods per plant in selection index appears to increase its relative efficiency. For practical view point, the selection index based on four characters, viz., clusters per plant + pods per plant + biological yield per plant + harvest index, is recommended for yield improvement in soybean.
Pakistan Journal of Biological Sciences, 2013
Electronic Journal of Plant Breeding, 2019
Designing model plant architecture through assessment of qualitative and quantitative traits in s... more Designing model plant architecture through assessment of qualitative and quantitative traits in sesame (Sesamum indicumL.)
National Journal of Plant Improvement, 2005
National Journal of Plant Improvement, 2007
ABSTRACT The P1 P2 F1 and F2 generations of H 7 variety (P1) as female parent with four male pare... more ABSTRACT The P1 P2 F1 and F2 generations of H 7 variety (P1) as female parent with four male parents (P2) viz., PLR 1, GBL 1, Green round and GCL 99-1 were Studies for six districts morphological characters viz., growth habit, fruit bearing habit, fruit shape, fruit colour, seedling colour and spiny leaf. The singe dominant gene was responsible for inheritance of spiny leaf, and possibly two complimentary genes for growth habit and three complimentary genes for fruit bearing habit were indicated in the present study. The ratio of 162: 94, 45: 19 and 27: 37 for fruit shape; 3: 1, 57: 7 and 54: 10 for fruit colour and 9 : 7, 54 : 10 and 162 : 94 for seedling colour indicated complex nature of inheritance for these characters and the differences in segregation pattern might be due to the presence of variety number of genes among the parental lines used in the study.
National Journal of Plant Improvement, 2007
Variability and selection indices were studied involving 100 germplasm lines of soybean. High her... more Variability and selection indices were studied involving 100 germplasm lines of soybean. High heritability was accompanied by high genetic advance and moderate to high GCV observed for all the characters under consideration, indicating the possibility of improving these traits through selection. Discriminant function analysis indicated that almost all the selection indices were found to be more efficient than straight selection based on seed yield alone. Selection efficiency of the function was improved by increasing number of characters in the index. The index consisting of all the six traits gave the highest genetic gain and selection efficiency. Inclusion of pods per plant in selection index appears to increase its relative efficiency. For practical view point, the selection index based on four characters, viz., clusters per plant + pods per plant + biological yield per plant + harvest index, is recommended for yield improvement in soybean. Key wards: Soybean, germplasm, heritabi...
The combining ability involving four females and eleven males using line x tester analysis was st... more The combining ability involving four females and eleven males using line x tester analysis was studied in two years with two date of sowing. Sufficient genetic variability was observed for earliness characters including seed yield per plant. Environments played a significant role in the expression of these traits. The sca/gca ratio indicated additive gene effects for days to flowering of primary raceme and seed yield per plant. Preponderance of non-additive gene effects was observed for days to maturity of primary raceme and nodes up to primary raceme. Both additive and non-additive gene effects were equally important for the inheritance of plant height up to primary raceme. Based on per se performance and gca effects, female JP 82 and male JI 258 found superior for earliness, while female JP 88 and male DCS 89 were good for seed yield per plant. The best per se yielding cross JP 88 x DCS 89 manifested significant desirable standard heterosis for seed yield per plant but undesirable...
"ABSTRACT The study was under taken using 21 selected bread wheat genotypes by class... more "ABSTRACT The study was under taken using 21 selected bread wheat genotypes by classifying according to their maturity time in three maturity group, i.e., early, mid-early and late group for comparative studies to know the effects of maturity time on cultivar variation for the characters related to growth duration and their associations among themselves and with grain yield. Significant variations for the characters under study were observed among the genotypes and genotypes within the maturity group, except for grain yield per plant in mid-early group. GW 173 was earliest among the genotypes studied. Lok 1 and Sonalika had short vegetative and long grain filling period and spent the highest percent (42%) of total life span to grain filling periods. However, grain yield per plant was the highest in Lok 42. The average value for maturity groups indicated that early group genotypes were 15 days shorter for vegetative and 6 days longer for grain filling periods with 25% higher yield than late group genotypes. The effect of maturity time was observed for correlations among the characters too. Significant positive correlation between days to ear emergence and maturity and significant negative correlation between days to ear emergence and grain filling index of late group became non-significant in early group. The correlation of grain yield per plant with days to ear emergence and maturity shifted from negative in late group to positive in early group. In fact, changes in associations could be due to mating system used for generating variability and selection practiced for obtaining more and more early types with desirable character combinations. "
"ABSTRACT Three brinjal varieties, their F1 and F2 generations from each of two ... more "ABSTRACT Three brinjal varieties, their F1 and F2 generations from each of two crosses, viz, H 7 x PLR 1 and H 7 x GBL 1 were grown in four replications of randomized block design. Heritability and associations for 10 characters were determined. All the characters in both the crosses were largely under genetic control, expect days to first picking in both the crosses and plant height in one cross, for which environment variance accounted for appreciable portion of the total variability. Complete dominance or over-dominance was observed for most the characters studied when the F1 means were compared with their respective parental means. Transgressive segregation was indicated for most of the characters studied in one direction or in both the directions. The heritability for days to first picking and plant height was erratic due to large environmental variance. The high heritability estimates for other characters warrant good progress from selection. Fruit per plant exhibited positive correlation with fruit yield per plant, fruit weight and fruit girth and negative association with fruit length only in one cross. Whereas association between fruit weight and fruit yield was significantly positive in both the cross. Thus, fruit weight seemed to be a major component of fruit yield and due consideration on this character should be given for improvement in fruit yield. "
International Journal of Agricultural Sciences, 2009
A set of 21 elite genotypes of durum wheat selected based on maturity time were evaluated for gra... more A set of 21 elite genotypes of durum wheat selected based on maturity time were evaluated for grain yield and some agronomical and physiological growth parameters. Variability and association analysis for 13 traits were carried out. Wide range of variation was observed for all the characters. The genotypic coefficient of variation was moderate for all the characters, except days to maturity, vegetative period and grain filling period, for which, the low magnitude was noted. High heritability coupled with high genetic advance was observed for days to ear emergence, plant height, flag leaf area, spike length, spikelets per spike, grains per spike and 100-grain weight. However, low heritability along with moderate genetic advance was observed for grain yield per plant, indicating that direct selection for grain yield would not be effective. Grain yield per plant was correlated in desired direction only with effective tillers per plant, therefore, this character should be considered as ...
"ABSTRACT 21 selected durum wheat genotypes by classifying them in to three matu... more "ABSTRACT 21 selected durum wheat genotypes by classifying them in to three maturity groups, i.e., early, midlate and late, were studied to know the effects of differences in maturity time on physiological growth parameters and grain yield. The mean values showed significant differences among the genotypes for all the characters. The Kiwi's' of early group had the shortest vegetative and the longest grain filling periods, whereas, midlate group variety HI 8498 was superior in grain yield per plant. The mean expression of maturity groups indicated the reduction in days to ear emergence, days to maturity, vegetative period, grain filling period and grain yield per plant with the increasing in earliness (late group through early group). Reverse was the true for 100-grain weight and grain filling index. Differences in maturity time also affected the correlation. Many unfavourable changes in magnitude and direction of correlations were observed in the early group genotypes when compared with the correlation coefficients of late group genotypes. Changes in mean performances and correlations may be due to mating system used for generating variability and tendency of plant breeders to select for more and more early types. Altering of undesirable changes should be possible by utilizing the genetic variations like Kiwi's' in appropriate breeding programmes. "
Indian journal of agricultural research, 2009
Genetic architecture of slow-rusting resistance to leaf rust was studied using generation mean an... more Genetic architecture of slow-rusting resistance to leaf rust was studied using generation mean analysis involving six basic generations (P1, P2, F1, F2, BC1 and BC2) of two bread wheat crosses viz., J 24 x HD 2189 and J 24 x HS 347. The individual and joint scaling tests revealed the presence of digenic epistasis for inheritance of slow-leaf rusting in both the crosses. The best fitting model revealed the significance of only additive (d) gene effect in cross J 24 x HD 2189 where simple selection could be effective for exploiting slow rusting phenomenon. In case of cross J 24 x HS 347, all the gene effects except (m) were significant indicating importance of additive and non-additive gene effects. Therefore, improvement through reciprocal recurrent selection, biparental mating or diallel selective mating could be employed for improvement of this trait. However, number of gene pairs controlling slow-leaf rusting was quite variable in both the crosses.
National Journal of Plant Improvement, 2007
"ABSTRACT: The F2 generation alongwith their five parents of four crosses were s... more "ABSTRACT: The F2 generation alongwith their five parents of four crosses were studied for variability, heritability and genetic advance for ten characters in brinjal. Observed and theoretical arithmetic and geometric means of F1 and F2 generations indicated the involvement of non-additive gene actions for fruit yield per plant, fruits per plant and days to first flower. Both GCV and PCV were low for days to first picking, moderate for days to first flower, plant height and fruit girth and high for branches per plant, fruit length, fruit shape index, fruits per plant, fruit weight and fruit yield per plant. High heritability alongwith high genetic advance and GCV for fruit length, fruit shape index, fruits per plant, fruit weight and fruit yield per plant in all the crosses suggested preponderance of additive gene actions for these traits. "
The genetic anslysis was carried out for green fodder yield and other eight quantitive characters... more The genetic anslysis was carried out for green fodder yield and other eight quantitive characters in forage sorghum...
Indian Journal of Genetics and Plant Breeding, 1982
A diallel analysis with seven varieties of forage sorghum revealed that gca and sca variances wer... more A diallel analysis with seven varieties of forage sorghum revealed that gca and sca variances were highly significant for days to flowering, plant height, number of leaves per plant, leaf length, leaf breadth, flag leaf area, green fodder and dry matter yield and crude protein percentage. ‘PC 6’, ‘SSG 59-3’ and ‘PC 1’ were good general combiners for green fodder as well as dry matter yield. Six crosses, ‘SSG 59-3 x PC 6’, ‘S 1049 x PC 1’, ‘SL 44 x PC 1’, ‘S 1049 x PC 6’, ‘SSG 59-3 x PC 1’ and ‘S 1049 x SSG 59 3’, were superior for green fodder and dry matter y eld.
"ABSTRACT The F1 and F2 generation of four crosses along with their respective paren... more "ABSTRACT The F1 and F2 generation of four crosses along with their respective parents were grown in randomized block design with four replications to study the inheritance and association of ten quantitative traits in brinjal. Additive-dominance model used to estimate m, [d] and [h] indicated that all the characters showed varied nature and magnitude of gene effects. Inadequacy of fit of the model as indicated by significant values of 2 in at least one of the four crosses for all the characters, except plant height, suggested non-additive gene effects for their inheritance. Multiple crossing followed by selective mating of plants in early segregating generation(s) may be appropriate to utilize such gene effects. Only the fruit weight gave significant positive correlations with fruit yield per plant in F2 generations of all the four crosses studied. This indicated that fruit weight should be the most important component of fruit yield in brinjal and due consideration should be given to this trait in selection programme. "
"ABSTRACT The P1, P2 and F2 generations of eight durum wheat crosses were studie... more "ABSTRACT The P1, P2 and F2 generations of eight durum wheat crosses were studied for maturity components and grain yield. The mean performances of parents and F2 generations for individual characters indicated that desirable transgressive segregations appear to be occurred for vegetative period, grain filling index and grain yield per plant in certain crosses, which should be exploited to select for superior types. Heritability was low for all the components of maturity but its magnitude was relatively higher for grain yield per plant in most crosses. High heritability for this trait indicated major role of additive gene action to explain the total variation existed for grain yield per plant in the material studied. Correlation coefficients revealed significant positive associations among days to ear emergence, days to maturity and vegetative period in all the crosses. Higher grain filing index was usually associated with earliness, shorter vegetative period and longer grain filling period. However, failuare to identify an association of these maturity components especially vegetative and grain filling periods with grain yield per plant indicated that selection for an optimal duration of vegetative and grain filling periods to improve grain yield would not seem to be a deserving objective for durum wheat particularly in our conditions. Therefore, breeding efforts should be concentrated on other characters related to grain yield. "
"ABSTRACT Generation mean analysis involving six basic generations of two crosse... more "ABSTRACT Generation mean analysis involving six basic generations of two crosses (Lok 1 x HD 2189 and Kalyan Sona x HS 347) was used to elucidate the inheritance of slow leaf-rusting resistance by best fitting model. Individual scaling tests and joint scaling test indicate the presence of epistasis for both the crosses. Both additive and dominance gene actions were involved in the genetics of slow leaf-rusting in cross Lok 1 x HD 2189, however, relative magnitude of dominance (h) was higher than additive (d). While additive gene action was involved in the inheritance of this trait in Kalyan Sona x HS 347. Additive x dominance (i) and dominance x dominance (l) interactions were also important for the expression of slow leaf-rusting in both the crosses. Duplicate epistasis of slow leaf-rusting was operating in cross Lok 1 x HD 2189. The number of gene pair controlling slow leaf-rusting in the cross Lok 1 x HD 2189 and Kalyan Sona x HS 347 indicate that HD 2189 possessed 1 to 12 and HS 347 possessed 1 to 4 genes for the differences in slow leaf-rusting. "
"ABSTRACT The F1, F2 and their three parents of two crosses, viz., H 7 x Green R... more "ABSTRACT The F1, F2 and their three parents of two crosses, viz., H 7 x Green Round and H 7 x GCL99-1 were grown in randomized block design with four replications. Differences in mean values of parents for various characters indicated involvement of diverse parents in the crosses studied. Heterotic response of hybrids and inbreeding depression in the F2 for fruit yield per plant indicated influence of non-additive gene action for the inheritance of this character. The F2 plants exceeded either of the parents for most of the characters, which seems to be due to transgressive segregation. CV values of F2 populations were higher than those of parents and F1s in nonsegregating populations, indicating high amount of variation exist in the material studied. High magnitude of heritability for most of the characters suggested the progress of improvement in yield and its components. Correlation analysis indicated that fruits per plant and fruit weight both were important components of fruit yield per plant. However, negative correlation between them would delay the progress in yield improvement. "
Electronic Journal of Plant Breeding, Dec 31, 2014
Variability and selection indices were studied involving 100 germplasm lines of soybean. High her... more Variability and selection indices were studied involving 100 germplasm lines of soybean. High heritability was accompanied by high genetic advance and moderate to high GCV observed for all the characters under consideration, indicating the possibility of improving these traits through selection. Discriminant function analysis indicated that almost all the selection indices were found to be more efficient than straight selection based on seed yield alone. Selection efficiency of the function was improved by increasing number of characters in the index. The index consisting of all the six traits gave the highest genetic gain and selection efficiency. Inclusion of pods per plant in selection index appears to increase its relative efficiency. For practical view point, the selection index based on four characters, viz., clusters per plant + pods per plant + biological yield per plant + harvest index, is recommended for yield improvement in soybean.
Pakistan Journal of Biological Sciences, 2013
Electronic Journal of Plant Breeding, 2019
Designing model plant architecture through assessment of qualitative and quantitative traits in s... more Designing model plant architecture through assessment of qualitative and quantitative traits in sesame (Sesamum indicumL.)
National Journal of Plant Improvement, 2005
National Journal of Plant Improvement, 2007
ABSTRACT The P1 P2 F1 and F2 generations of H 7 variety (P1) as female parent with four male pare... more ABSTRACT The P1 P2 F1 and F2 generations of H 7 variety (P1) as female parent with four male parents (P2) viz., PLR 1, GBL 1, Green round and GCL 99-1 were Studies for six districts morphological characters viz., growth habit, fruit bearing habit, fruit shape, fruit colour, seedling colour and spiny leaf. The singe dominant gene was responsible for inheritance of spiny leaf, and possibly two complimentary genes for growth habit and three complimentary genes for fruit bearing habit were indicated in the present study. The ratio of 162: 94, 45: 19 and 27: 37 for fruit shape; 3: 1, 57: 7 and 54: 10 for fruit colour and 9 : 7, 54 : 10 and 162 : 94 for seedling colour indicated complex nature of inheritance for these characters and the differences in segregation pattern might be due to the presence of variety number of genes among the parental lines used in the study.
National Journal of Plant Improvement, 2007
Variability and selection indices were studied involving 100 germplasm lines of soybean. High her... more Variability and selection indices were studied involving 100 germplasm lines of soybean. High heritability was accompanied by high genetic advance and moderate to high GCV observed for all the characters under consideration, indicating the possibility of improving these traits through selection. Discriminant function analysis indicated that almost all the selection indices were found to be more efficient than straight selection based on seed yield alone. Selection efficiency of the function was improved by increasing number of characters in the index. The index consisting of all the six traits gave the highest genetic gain and selection efficiency. Inclusion of pods per plant in selection index appears to increase its relative efficiency. For practical view point, the selection index based on four characters, viz., clusters per plant + pods per plant + biological yield per plant + harvest index, is recommended for yield improvement in soybean. Key wards: Soybean, germplasm, heritabi...
The combining ability involving four females and eleven males using line x tester analysis was st... more The combining ability involving four females and eleven males using line x tester analysis was studied in two years with two date of sowing. Sufficient genetic variability was observed for earliness characters including seed yield per plant. Environments played a significant role in the expression of these traits. The sca/gca ratio indicated additive gene effects for days to flowering of primary raceme and seed yield per plant. Preponderance of non-additive gene effects was observed for days to maturity of primary raceme and nodes up to primary raceme. Both additive and non-additive gene effects were equally important for the inheritance of plant height up to primary raceme. Based on per se performance and gca effects, female JP 82 and male JI 258 found superior for earliness, while female JP 88 and male DCS 89 were good for seed yield per plant. The best per se yielding cross JP 88 x DCS 89 manifested significant desirable standard heterosis for seed yield per plant but undesirable...
"ABSTRACT The study was under taken using 21 selected bread wheat genotypes by class... more "ABSTRACT The study was under taken using 21 selected bread wheat genotypes by classifying according to their maturity time in three maturity group, i.e., early, mid-early and late group for comparative studies to know the effects of maturity time on cultivar variation for the characters related to growth duration and their associations among themselves and with grain yield. Significant variations for the characters under study were observed among the genotypes and genotypes within the maturity group, except for grain yield per plant in mid-early group. GW 173 was earliest among the genotypes studied. Lok 1 and Sonalika had short vegetative and long grain filling period and spent the highest percent (42%) of total life span to grain filling periods. However, grain yield per plant was the highest in Lok 42. The average value for maturity groups indicated that early group genotypes were 15 days shorter for vegetative and 6 days longer for grain filling periods with 25% higher yield than late group genotypes. The effect of maturity time was observed for correlations among the characters too. Significant positive correlation between days to ear emergence and maturity and significant negative correlation between days to ear emergence and grain filling index of late group became non-significant in early group. The correlation of grain yield per plant with days to ear emergence and maturity shifted from negative in late group to positive in early group. In fact, changes in associations could be due to mating system used for generating variability and selection practiced for obtaining more and more early types with desirable character combinations. "
"ABSTRACT Three brinjal varieties, their F1 and F2 generations from each of two ... more "ABSTRACT Three brinjal varieties, their F1 and F2 generations from each of two crosses, viz, H 7 x PLR 1 and H 7 x GBL 1 were grown in four replications of randomized block design. Heritability and associations for 10 characters were determined. All the characters in both the crosses were largely under genetic control, expect days to first picking in both the crosses and plant height in one cross, for which environment variance accounted for appreciable portion of the total variability. Complete dominance or over-dominance was observed for most the characters studied when the F1 means were compared with their respective parental means. Transgressive segregation was indicated for most of the characters studied in one direction or in both the directions. The heritability for days to first picking and plant height was erratic due to large environmental variance. The high heritability estimates for other characters warrant good progress from selection. Fruit per plant exhibited positive correlation with fruit yield per plant, fruit weight and fruit girth and negative association with fruit length only in one cross. Whereas association between fruit weight and fruit yield was significantly positive in both the cross. Thus, fruit weight seemed to be a major component of fruit yield and due consideration on this character should be given for improvement in fruit yield. "
International Journal of Agricultural Sciences, 2009
A set of 21 elite genotypes of durum wheat selected based on maturity time were evaluated for gra... more A set of 21 elite genotypes of durum wheat selected based on maturity time were evaluated for grain yield and some agronomical and physiological growth parameters. Variability and association analysis for 13 traits were carried out. Wide range of variation was observed for all the characters. The genotypic coefficient of variation was moderate for all the characters, except days to maturity, vegetative period and grain filling period, for which, the low magnitude was noted. High heritability coupled with high genetic advance was observed for days to ear emergence, plant height, flag leaf area, spike length, spikelets per spike, grains per spike and 100-grain weight. However, low heritability along with moderate genetic advance was observed for grain yield per plant, indicating that direct selection for grain yield would not be effective. Grain yield per plant was correlated in desired direction only with effective tillers per plant, therefore, this character should be considered as ...
"ABSTRACT 21 selected durum wheat genotypes by classifying them in to three matu... more "ABSTRACT 21 selected durum wheat genotypes by classifying them in to three maturity groups, i.e., early, midlate and late, were studied to know the effects of differences in maturity time on physiological growth parameters and grain yield. The mean values showed significant differences among the genotypes for all the characters. The Kiwi's' of early group had the shortest vegetative and the longest grain filling periods, whereas, midlate group variety HI 8498 was superior in grain yield per plant. The mean expression of maturity groups indicated the reduction in days to ear emergence, days to maturity, vegetative period, grain filling period and grain yield per plant with the increasing in earliness (late group through early group). Reverse was the true for 100-grain weight and grain filling index. Differences in maturity time also affected the correlation. Many unfavourable changes in magnitude and direction of correlations were observed in the early group genotypes when compared with the correlation coefficients of late group genotypes. Changes in mean performances and correlations may be due to mating system used for generating variability and tendency of plant breeders to select for more and more early types. Altering of undesirable changes should be possible by utilizing the genetic variations like Kiwi's' in appropriate breeding programmes. "
Indian journal of agricultural research, 2009
Genetic architecture of slow-rusting resistance to leaf rust was studied using generation mean an... more Genetic architecture of slow-rusting resistance to leaf rust was studied using generation mean analysis involving six basic generations (P1, P2, F1, F2, BC1 and BC2) of two bread wheat crosses viz., J 24 x HD 2189 and J 24 x HS 347. The individual and joint scaling tests revealed the presence of digenic epistasis for inheritance of slow-leaf rusting in both the crosses. The best fitting model revealed the significance of only additive (d) gene effect in cross J 24 x HD 2189 where simple selection could be effective for exploiting slow rusting phenomenon. In case of cross J 24 x HS 347, all the gene effects except (m) were significant indicating importance of additive and non-additive gene effects. Therefore, improvement through reciprocal recurrent selection, biparental mating or diallel selective mating could be employed for improvement of this trait. However, number of gene pairs controlling slow-leaf rusting was quite variable in both the crosses.
National Journal of Plant Improvement, 2007
"ABSTRACT: The F2 generation alongwith their five parents of four crosses were s... more "ABSTRACT: The F2 generation alongwith their five parents of four crosses were studied for variability, heritability and genetic advance for ten characters in brinjal. Observed and theoretical arithmetic and geometric means of F1 and F2 generations indicated the involvement of non-additive gene actions for fruit yield per plant, fruits per plant and days to first flower. Both GCV and PCV were low for days to first picking, moderate for days to first flower, plant height and fruit girth and high for branches per plant, fruit length, fruit shape index, fruits per plant, fruit weight and fruit yield per plant. High heritability alongwith high genetic advance and GCV for fruit length, fruit shape index, fruits per plant, fruit weight and fruit yield per plant in all the crosses suggested preponderance of additive gene actions for these traits. "
The genetic anslysis was carried out for green fodder yield and other eight quantitive characters... more The genetic anslysis was carried out for green fodder yield and other eight quantitive characters in forage sorghum...
Indian Journal of Genetics and Plant Breeding, 1982
A diallel analysis with seven varieties of forage sorghum revealed that gca and sca variances wer... more A diallel analysis with seven varieties of forage sorghum revealed that gca and sca variances were highly significant for days to flowering, plant height, number of leaves per plant, leaf length, leaf breadth, flag leaf area, green fodder and dry matter yield and crude protein percentage. ‘PC 6’, ‘SSG 59-3’ and ‘PC 1’ were good general combiners for green fodder as well as dry matter yield. Six crosses, ‘SSG 59-3 x PC 6’, ‘S 1049 x PC 1’, ‘SL 44 x PC 1’, ‘S 1049 x PC 6’, ‘SSG 59-3 x PC 1’ and ‘S 1049 x SSG 59 3’, were superior for green fodder and dry matter y eld.
"ABSTRACT The F1 and F2 generation of four crosses along with their respective paren... more "ABSTRACT The F1 and F2 generation of four crosses along with their respective parents were grown in randomized block design with four replications to study the inheritance and association of ten quantitative traits in brinjal. Additive-dominance model used to estimate m, [d] and [h] indicated that all the characters showed varied nature and magnitude of gene effects. Inadequacy of fit of the model as indicated by significant values of 2 in at least one of the four crosses for all the characters, except plant height, suggested non-additive gene effects for their inheritance. Multiple crossing followed by selective mating of plants in early segregating generation(s) may be appropriate to utilize such gene effects. Only the fruit weight gave significant positive correlations with fruit yield per plant in F2 generations of all the four crosses studied. This indicated that fruit weight should be the most important component of fruit yield in brinjal and due consideration should be given to this trait in selection programme. "
"ABSTRACT The P1, P2 and F2 generations of eight durum wheat crosses were studie... more "ABSTRACT The P1, P2 and F2 generations of eight durum wheat crosses were studied for maturity components and grain yield. The mean performances of parents and F2 generations for individual characters indicated that desirable transgressive segregations appear to be occurred for vegetative period, grain filling index and grain yield per plant in certain crosses, which should be exploited to select for superior types. Heritability was low for all the components of maturity but its magnitude was relatively higher for grain yield per plant in most crosses. High heritability for this trait indicated major role of additive gene action to explain the total variation existed for grain yield per plant in the material studied. Correlation coefficients revealed significant positive associations among days to ear emergence, days to maturity and vegetative period in all the crosses. Higher grain filing index was usually associated with earliness, shorter vegetative period and longer grain filling period. However, failuare to identify an association of these maturity components especially vegetative and grain filling periods with grain yield per plant indicated that selection for an optimal duration of vegetative and grain filling periods to improve grain yield would not seem to be a deserving objective for durum wheat particularly in our conditions. Therefore, breeding efforts should be concentrated on other characters related to grain yield. "
"ABSTRACT Generation mean analysis involving six basic generations of two crosse... more "ABSTRACT Generation mean analysis involving six basic generations of two crosses (Lok 1 x HD 2189 and Kalyan Sona x HS 347) was used to elucidate the inheritance of slow leaf-rusting resistance by best fitting model. Individual scaling tests and joint scaling test indicate the presence of epistasis for both the crosses. Both additive and dominance gene actions were involved in the genetics of slow leaf-rusting in cross Lok 1 x HD 2189, however, relative magnitude of dominance (h) was higher than additive (d). While additive gene action was involved in the inheritance of this trait in Kalyan Sona x HS 347. Additive x dominance (i) and dominance x dominance (l) interactions were also important for the expression of slow leaf-rusting in both the crosses. Duplicate epistasis of slow leaf-rusting was operating in cross Lok 1 x HD 2189. The number of gene pair controlling slow leaf-rusting in the cross Lok 1 x HD 2189 and Kalyan Sona x HS 347 indicate that HD 2189 possessed 1 to 12 and HS 347 possessed 1 to 4 genes for the differences in slow leaf-rusting. "
"ABSTRACT The F1, F2 and their three parents of two crosses, viz., H 7 x Green R... more "ABSTRACT The F1, F2 and their three parents of two crosses, viz., H 7 x Green Round and H 7 x GCL99-1 were grown in randomized block design with four replications. Differences in mean values of parents for various characters indicated involvement of diverse parents in the crosses studied. Heterotic response of hybrids and inbreeding depression in the F2 for fruit yield per plant indicated influence of non-additive gene action for the inheritance of this character. The F2 plants exceeded either of the parents for most of the characters, which seems to be due to transgressive segregation. CV values of F2 populations were higher than those of parents and F1s in nonsegregating populations, indicating high amount of variation exist in the material studied. High magnitude of heritability for most of the characters suggested the progress of improvement in yield and its components. Correlation analysis indicated that fruits per plant and fruit weight both were important components of fruit yield per plant. However, negative correlation between them would delay the progress in yield improvement. "