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本文采用NCⅡ交配设计方法,以9个陆地棉品种(系)配置16个杂交组合,利用加性—显性与环境互作的遗传模型(ADE模型),分析亲本和F1在2013年持续高温干旱条件下望江、九江2个环境下的农艺和产量性状,估算了各项遗传方差分量,分析了性状间各项遗传效应的相关性和各性状的杂种优势。结果表明,农艺和产量性状易受环境条件影响,子棉产量、皮棉产量、单株铃数和铃重的遗传主要受显性效应控制,衣分同时受加性和显性效应控制,子指主要受加性效应控制。遗传相关分析表明,子棉产量和皮棉产量与铃重和衣分呈显性正相关;铃重与衣分呈显性正相关,衣分与子指的加性和显性均为负相关。杂种优势分析表明,中棉所63的铃重、衣分、子指、子棉产量和皮棉产量的群体平均优势达极显著水平,其皮棉产量的杂种优势可以利用至F3。
In this study, 16 crosses were set up in 9 cotton genotypes by using the NCⅡ mating design method. The genetic model of additive-dominance and environmental interaction (ADE model) Under the condition of Wangjiang and Jiujiang, the agronomic and yield traits were calculated. The genetic variance components were estimated. The correlations of the genetic effects and the heterosis of each trait were analyzed. The results showed that agronomic and yield traits were easily affected by environmental conditions. The inheritance of seed cotton yield, lint yield, boll number per plant and boll weight were mainly controlled by the dominant effect. The lint percentage was controlled by both additive and dominance effects. Mainly affected by additive effects. Genetic correlation analysis showed that cotton boll yield and boll yield were positively correlated with boll weight and lint percentage. Boll weight was positively correlated with lint percentage, while both lint percentage and lint percentage were negatively correlated. Heterosis analysis showed that the average superiority of population of boll weight, lint, sub-finger, cotton seed yield and lint yield of CCRI 63 reached an extremely significant level, and the heterosis of lint yield could be utilized to F3.