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《Acta Agronomica Sinica》 1995-06
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Genetic Analysis on Direct and Maternal Effects of Seed Traits in Upland Cotton (Gossypium hirsutum L.)

Wu Jixiang Wang Guojian Zhu Jun Xu Fuhua Ji Daofan(Agronomy Department, Zhejiang Agricultural University, Hangzhou, 310029)  
Five cotton (Gossypium hirsutum L.) parents and their F1s, F2s, BC1; BC2, RBC1 and RBC2 were analyzed by genetic model for diploid plant seeds with MINQUE(0/1) approaches. The estimates of genetic variance components indicated that maternal genetic effects were more important than direct effects for cotton seed index, kernel percentage, seed density and seed oil percentage, respectively. Direct dominance variance component was significant for kernel percentage and seed density but not for other two seed traits. Covarianaces between direct and maternal effects were small and not significant. Highly signifficant variances were detected for cytoplasmic effects of seed density and seed-oil percentage. Cotton varieties could be developed for these seed traits by direct selection based on maternal plants. Genetic material with high oil content could also be developed by indirect selection for small seed index and large seed density based on maternal plants. The larger the values of the maternal additive effects were, the higher the total values of the maternal additive effects in hybrids were.
【Fund】: 浙江省教委资助项目
【CateGory Index】: S562
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