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基于玉米BC2F2群体的穗部性状QTL分析

DOI: 10.7668/hbnxb.2010.04.016, PP. 73-77

Keywords: 玉米,数量性状位点,穗部性状,作图群体

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Abstract:

以农系110为受体、农系31为供体材料,采用回交法构建了样本容量为9株的BC2F2回交群体,选取126个均匀分布在10条染色体上的多态性SSR标记进行6个穗部性状QTL分析.结果表明,受体农系110的穗长、穗粗、穗行数、行粒数、百粒重和穗粒重6个穗部性状表型值分别增加了9.4%,9.6%,4.1%,2.7%,0.3%和4.4%;构建一张含126个SSR标记的玉米分子标记连锁遗传图谱,总长度为2317.4cM,平均区间长18.4cM;采用复合区间作图法,定位了19个与玉米穗部性状有关的QTL,其中穗长QTL4个,穗粗QTL2个,行粒数QTL1个,穗行数QTL3个,百粒重QTL4个,穗粒重QTL个.

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