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分别应用具有 112和 160个标记位点的两个籼 /籼交组合的 F2 群体的连锁图 ,对控制水稻株高的数量性状基因 (QTL)进行了研究。各定位了 4个和 3个株高 QTL,每个 QTL的贡献率在 5 .6%～ 2 2 .9%之间。在一个群体中 ,4个 QTL都表现为完全显性或超显性 ;在另一个群体中 ,3个 QTL均表现为部分显性。分别检测到 7对和 5对影响株高的双基因互作 ,其中一个群体以加性 -加性互作为主 ,另一个群体以加性 -显性 (或显性 -加性 )为主 ,两个群体中均没有检测到显性 -显性互作。另外 ,在二个群体中 ,都有 2个 QTL在染色体位置、基因作用模式和效应方向诸方面 ,与产量性状 QTL表现一致。
The linkage map of F2 population with two indica / indica crosses with 112 and 160 loci was used to study the quantitative trait loci (QTLs) controlling plant height in rice. Four and three plant height QTLs were mapped, with the contribution rate of each QTL being between 5.6% and 22.9%. In one population, all four QTLs were completely dominant or over dominant. In the other population, all three QTLs showed partial dominant. Seven pairs and five pairs of double-gene interactions affecting plant height were detected. One of them was additive-additive interaction, the other was additive-dominance (or dominant-additive) No dominant-dominant interaction was detected in either population. In addition, in the two populations, two QTLs were consistent with the QTLs for yield traits in terms of chromosomal location, gene mode of action and direction of effects.