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本研究以光温敏不育系培矮64s(PA64s)为母本、超级籼稻品种93-11为父本构建的132个重组自交系为遗传材料,于2014年分别在陵水和富阳考察了剑叶夹角和单株产量两个性状,并开展QTL定位和分析。结果显示:两地共检测到控制水稻剑叶夹角的QTL 41个,其中5个位点在两地均检测到,占总数的12.2%;剑叶夹角在陵水检测到新的QTL位点12个,在富阳检测到新的QTL 17个,贡献率较大的加性效应大都来自培矮64s。两地共检测到单株产量QTL 15个,贡献率较大的加性效应基本都来自93-11。本研究进一步讨论了剑叶夹角对产量和杂交育种的影响,可为水稻理想株型分子设计育种提供理论依据。
In this study, 132 recombinant inbred lines constructed from the photoperiod-sensitive male sterile line Pei’ai 64s (PA64s) as the female parent and the super-indica rice variety 93-11 as the male parent were used as the genetic material in Lingshui and Fuyang respectively The angle of flag leaf and the yield of two traits, and QTL mapping and analysis. The results showed that 41 QTLs controlling the angle of flag leaf were detected in both loci, of which 5 loci were detected in both loci, accounting for 12.2% of the total; 12 were detected, 17 new QTLs were detected in Fuyang, and most of the additive effects with large contribution rate came from Pegasi 64s. A total of 15 QTLs per plant were detected in these two areas. The additive effects with larger contribution rates were all from 93-11. This study further discussed the effect of the angle between the flag leaf and the crossbreeding on the yield and breeding, which could provide a theoretical basis for the design and breeding of the ideal plant-type molecular marker in rice.