Heterosis study in Okra [Abelmoschus esculentus (L.) Moench] genotypes for pod yield attributes (original) (raw)
Related papers
2020
The present study was conducted in okra to estimate the magnitude of heterosis and to identify superior cross combinations for yield and its component traits. Thirty six F1s were developed by crossing 6 lines viz., Pusa Sawani (L1), Parbhani Kranti (L2), Arka Abhay (L3), Arka Anamika (L4), AE 65 (L5) and 14/11 (L6) and 6 testers viz., AE 64 (T1), AE 66 (T2), AE 17 (T3),14/4 (T4), 14/5 (T5) and 14/10 (T6) of okra in line x tester design during summer of 2018. All the 36 F1s along with their 12 parents (6 lines and 6 testers) and one standard check (Bhendi Hybrid CO 4) were evaluated in a randomized complete block design with two replications at Department of Vegetable Crops, Tamil Nadu Agricultural University, Coimbatore. Significance of mean squares due to treatments revealed the presence of considerable amount of genetic variability among the parents and cross combinations for all yield and yield attributing traits. The relative heterosis recorded the highest of 39.71 per cent in L...
2019
Seven genotypes and their 21 F1 crosses obtained from half diallel mating design were investigated to estimate the magnitude of heterosis for yield and its parameters. The extent of heterosis ranged for all the characters under study. Desirable heterosis for days to 1 flowering was observed in Annika X Rajini over both mid parent and better parent while the cross EC359637 X Arka Anamika significant desirable heterosis over standard check. For average fruit weight, the maximum magnitude of heterosis was obtained in cross EC359637 X Arka Anamika over average parent, Annika X IC014026 over better parent and Annika X EC359637 over better parent. Maximum desirable heterosis for yield per plant was observed in EC359637 X IC014026 over mid parent, better parent and standard check followed EC359637 X IC013664 and EC359637 X EC305768. Higher magnitude of heterosis observed in crosses revealed presence of significant genetic diversity among the genotypes.
Heterosis for Yield and Yield Components in Okra (Abelmoschus esculentus (L.) Moench)
Chilean journal of agricultural research, 2012
The study of heterosis would help in selection of heterotic crosses for commercial exploitation of F 1 hybrids in okra (Abelmoschus esculentus (L.) Moench). Forty five F 1 s were developed by crossing 10 elite lines of okra: P 1 (IC282248), P 2 (IC27826-A), P 3 (IC29119-B), P 4 (IC31398-A), P 5 (IC45732), P 6 (IC89819), P 7 (IC89976), P 8 (IC90107), P 9 (IC99716), and P 10 (IC111443), in half diallel fashion during summer 2009. All 45 F 1 s along with their 10 parents and one standard control (Mahyco Hybrid N° 10) were evaluated in a randomized complete block design with three replicates during early kharif (June to September) 2009 at the Vegetable Research Station, Rajendranagar, Andhra Pradesh, India, for heterosis of yield and its components of okra. Significance of mean squares due to genotypes revealed the presence of considerable genetic variability among the material studied for almost all yield and yield attributes except plant height. The overall mean heterosis over mid parent and standard control for total yield per plant was 6.92 and-15.44%, respectively, while for marketable yield per plant were 6.64 and-22.18%, respectively. Negatively heterotic crosses like C 19 (P 3 ×P 5) for days to 50% flowering (-4.35%) and C 4 (P 1 ×P 5) for first flowering and fruiting nodes (-15.22%), respectively, are important to exploit heterosis for earliness in okra. The crosses with non-significant standard heterosis in any given direction for total yield per plant C 42 , C 31 , C 35 , C 25 , and C 36 (8.63,-0.08,-2.61,-3.26, and-4.57%, respectively) and marketable yield per plant C 42 , C 31 , and C 36 (-5.87,-6.56, and-10.54%, respectively), were statistically on par with the standard control in their mean performance and are found to be as promising as that of the standard control. The F 1 hybrid C 42 (P 7 ×P 10) with high yield potential has the potential for commercial cultivation after further evaluation for early kharif season.
Heterosis for yield and its related traits in Okra (Abelmoschus esculentus L. Moench)
Electronic Journal of Plant Breeding, 2016
Eight parental lines of okra and their 28 F 1 hybrids obtained from half diallel were studied to investigate the extent of heterosis for yield and yield attributing characters. The magnitude of heterosis varied from cross to cross for all the characters studied. Maximum positive heterosis for fruit yild per plant over better parent and standard check (JOH 2) was observed to be 62.12 and 44.11 per cent, respectively. The cause of heterosis may be due to its component traits, mainly, days to first flowering, nodes per plant, length of internode, fruit weight and fruits per plant. The best performing hybrid AOL 09-25 x AOL 09-26 which recorded 44.11 per cent heterosis for yield over standard check may be exploited for commercial cultivation.
Assessment for Heterosis in Okra (Abelmoschusesculentus L.) Moench): A Review
International Journal of All Research Education and Scientific Methods (IJARESM), 2020
The heterosis increase yield, reproductive activity, biotic and abiotic resistance general vigour and quality. Decrease in the fitness and vigour inbreeding effect that is in breeding depression. Continuous selfing increase homozygosity in genotype. This is due to because of undesirable recessive gene. But in heterosis some servable dominant gene of a parent are dominant over recessive gene of other parents. Selection of the character is easy when the heritability of the character is very high. Variation is produced by genotype or additive effect this is due to the very close correspondence between genotype and phenotype having a little contribution of the environmental effect. The study of heterosis is done in okra many characters are taken in the study like flowering, resistance to stress, yield, etc. current research explicitly revealed the scope for improving okra productivity through heterosis breeding. As okra an often-cross-pollinated crop, it responds very good to heterosis breeding.
Evaluation for Heterosis in Okra (Abelmoschus esculentus (L.) Moench)
International Journal of Pure & Applied Bioscience
The present investigation was conducted in okra to study the magnitude of heterosis and to identify potential parents and superior cross combinations for twelve plant traits including fruit yield and its component traits. Forty five F 1 s were developed by crossing 10 elite lines of okra in half diallel fashion during summer 2016. All 45 F 1 s along with their 10 parents and one standard check (Nunhems hybrid Shakti) were evaluated in a randomized complete block design with three replications during late kharif
Heterotic studies of 45 single crosses derived from crossing 10 horticulturally superior, optimally diverse and nearly homozygous lines of okra (Abelmoschus esculentus (L.) Moench), namely P 1 (IC282248), P 2 (IC27826-A), P 3 (IC29119-B), P 4 (IC31398-A), P 5 (IC45732), P 6 (IC89819), P 7 (IC89976), P 8 (IC90107), P 9 (IC99716) and P 10 (IC111443) in a half diallel fashion over three seasons (early, mid and late kharif, 2009) revealed an appreciable amount of average heterosis and heterobeltiosis in a desirable direction in a good number of crosses for the majority of growth, earliness and yield attributes. Cross C 4 (P 1 ×P 5), displaying high negative heterosis over the standard check for days to 50% flowering (-4.24%) and first flowering and fruiting node (-13.22 %) is important to exploit heterosis for earliness in okra. The crosses with non-significant standard heterosis in any direction for total yield per plant C 42 (P 7 ×P 10), C 31 (P 5 ×P 6), C 35 (P 5 ×P 10), C 25 (P 4 ×P 5) and C 17 (P 2 ×P 10) and marketable yield per plant C 42 (P 7 ×P 10), C 31 (P 5 ×P 6), were statistically on par with the standard check in their mean performance and were as promising as that of the standard check under comparison (Mahyco Hybrid No. 10). Of the two comparable hybrids identified for both total yield and marketable yield/plant (C 42 and C 31), the F 1 hybrid C 42 (P 7 ×P 10) also had good fruit quality, which can be exploited after further testing at different locations for commercial cultivation for the entire kharif season.
2017
An experiment was conducted to study the presence of heterosis, inbreeding depression and the extent of residual heterosis in three cross combinations of okra namely, Arka Anamika × Parbhani Kranti, Arka Anamika × MDU 1 and Parbhani Kranti × MDU 1 involving five generations viz., P1, P2, F1, F2 and F3. The extent of relative heterosis, heterobeltiosis and standard heterosis was estimated for assessing the hybrid value for nine quantitative characters viz., days to first flower, plant height, inter node length, number of nodes per plant, number of fruits per plant, fruit length, fruit girth, fruit weight and fruit yield per plant. The cross Arka Anamika × Parbhani Kranti showed favorable significant relative heterosis and standard heterosis for days to first flower, plant height, number of fruits per plant, fruit length, fruit weight and fruit yield per plant. The same cross also recorded high residual heterosis for days to first flower, plant height, fruit weight and fruit yield per...