Genotype x environment interactions in sesame yield trials
1996
Prasit Jaisil | Srisom Visrutaratna | Suwit Laohasiriwong | Fukuoka, Hisao (Khon Kaen Univ., Khon Kaen (Thailand). Faculty of Agriculture. Dept. of Agronomy)
Fourteen sesame genotypes were evaluated at five locations i.e. Khon Kaen, Loei, Maha Sarakham, Roi Et and Ubon Ratchathani in late rainy season of 1988 and early rainy season of 1989. The objectives of this study were to examine genotype x environment interactions, to estimate broad-sense heritability and to evaluate yield stability in sesame. The results showed that genotype x environment variance components were less than genetic variance components in all characters. High broad-sense heritabilities were observed for plant height, number of branches/plant, number of capsules/plant and 1,000 seed weight, but rather low in seed yield. Stability analyses gave regression coefficients ranging from 0.472 to 1.979 (1.00 defined a stable genotype) for seed yield. On the basis of b and S sub(2)d, CW 103 and Roi Et 1 are suitable genotypes for growing under favorable environments. MKS/I/84013, Hnanni 25/160, MK 60 and Chaibadan are suitable genotypes for growing under unfavorable environments. CB 80, No.8202/P2/18/1P, MKS/I/83042/1, Sukhothai and Nakornsawan are identified as the stable genotypes.
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