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以将大面积应用的籼型恢复系蜀恢527和明恢86为轮回亲本,以另外3个水稻品种作为导入亲本,在回交种植的BC2F2世代,按照产量综合性状较优的原则,在6个群体选择单株,得到6个籼型恢复系的产量选择导入群体。通过对6个群体在合肥和海南试验点的田间株高性状的单双向方差分析,总共检测到0.01显著水平的12个主效QTL和145对上位互作,主效QTL和上位互作在不同群体之间表现出了遗传稳定性和群体和环境的特异性。一些位点通过上位互作和遗传连锁相互联系起来,构成了控制株高的协同互作的网络,又发现主效QTL与很多的参与上位互作位点紧密连锁或者直接参与了很多的上位互作,由此推断主效QTL是由于位点上位互作效应使之凸显出来。最后提出了改良水稻的株高提高水稻产量的策略。
The restorer lines Shuhui 527 and Minghui 86, which are large-scale indica restorer lines, were used as the reincarnated parents. Three other rice cultivars were introduced as parents. In the BC2F2 generation of backcrossing cultivation, A single population of individuals was selected to obtain six indica restorer lines for yield selection. Through the one-way and two-way ANOVAs analysis of six plant height traits in field in Hefei and Hainan, a total of 12 major-effect QTLs of 0.01 significant level and 145 pairs of epistatic interactions were detected. The main-effect QTLs and epistasis were different The population showed genetic stability and population and environmental specificity. Some sites are interconnected by epistatic interactions and genetic linkage and constitute a network of synergistic interactions that control plant height. The major QTLs are also found to be closely linked to many of the epistatic sites or directly involved in many epistatic interactions As a result, it is inferred that the main effect QTL is highlighted by the interaction of the upper position of the locus. Finally, the strategy of improving rice plant height to increase rice yield is proposed.