利用7个置换系和渐渗系的双列杂交研究海陆杂种的数量性状遗传

Diallel analysis of quantitative traits of hybrid between Gossypium barbadense L.and G.hirsutum L.using 7 substitution and introgression lines

对7个置换系和渐渗系与陆地棉遗传标准系TM 1的重要农艺性状进行了系统遗传分析。利用加性显性加性×加性上位性及其与环境互作模型(ADAA),分析了8个杂交亲本和28个F1主要农艺性状的2年资料,估算了各项遗传方差分量。结果表明,产量性状主要受加性效应和显性效应共同控制,其中衣分和衣指加性方差的比率较高,分别为33.0%和42.2%,单株铃数以显性效应为主。纤维长度和麦克隆值存在显著的加性×加性上位性效应,比强度由加性和显性效应共同控制。主要产量和品质性状的狭义和广义遗传率均达到极显著水平。

Three substitution lines of 16, 17, 18 chromosome of Gossypium barbadense and 4 introgression lines with chromosome segments of Gossyplum barbadense in G. hirsutum standard background, TM-1, were genetically evaluated for important agronomic traits. Eight parents and their 28 F1 crosses of substitution lines in upland cotton were analyzed for their genetic effects alternatively by the genetic model of additive, dominance, additive × additive and their interaction with environment （ADAA）. Genetic variance components were estimated. The results indicated that important yield traits were mainly controlled by additive effects and dominant effects, lint percentage and lint index were controlled by additive effects, were 33.0% and 42. 2%. Bolls were controlled by dominant effects. Fiber length and micronaire were significant additive × additive variance, fiber strength were mainly controlled by the additive effects and dominant effects. Broad and narrow sense heritability estimates were significant at 0.01 level for the important agronomic traits.