Genetic analysis of oil and amino acid content in shelled seed of upland cotton hybrids
1988
Ji Daofan | Zhu Jun (Zhejiang Agricultural Univ., Hangzhou (China). Dept. of Agronomy)
The oil and amino acid contents in seed kernel of four parents and their F1 hybrids in upland cotton (Gossypium hirsutum L. ) were studied by diallel analysis. Heterosis and genetic effects of these traits were analysed, and correlation coefficients among some seed traits were also examined. There were positive heterosis (4.75%) for oil content and negative heterosis (-3.60%) for total amino acid content in seed kernel. These two traits had larger dominance variances (H1, H2) than their additive variances (D) which were controlled by dominant genes. The dominant genes of oil contents show positive effects, and that of total amino acid contents show negative effects. There was a highly significant correlation between oil content in seed kernel and kernel percentage (r=0.678). The correlation coefficients between total amino acid content in seed kernel and seed index (r=0.504), and kernel index (r=0.447) were significant too. Heterosis and genetic parameters of all amino acids, excluding methionine, were similar to those of total amino acid content.
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