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甜玉米果皮柔嫩度QTL定位

DOI: 10.7671/j.issn.1001-411X.2012.04.004, PP. 444-447

Keywords: 甜玉米,果皮柔嫩度,QTL定位,SSR,遗传图谱

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Abstract:

由组合B15(不柔嫩)×B20(柔嫩)构建的F2:3家系群体(236个家系)为作图群体,构建了包含89个SSR标记的玉米遗传连锁图谱.图谱的总长度为1317.2cM,相邻两标记间平均距离为14.8cM.在F2:3家系群体中,共检测到与甜玉米果皮嫩度性状相关的QTL4个,分别位于第3、4、7染色体上,分别解释表型变异的3.0%、1.1%、1.0%和6.0%,且4个QTL加性效应均为负值,表明均来自果皮柔嫩度较好的亲本,具有降低果皮柔嫩度值,改善果皮柔嫩度的作用.

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