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玉米生育期QTL定位及上位性互作效应的遗传研究

DOI: 10.7668/hbnxb.2010.02.016, PP. 84-87

Keywords: 玉米,生育期,数量性状基因座位,上位性分析

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Abstract:

为了探讨玉米生育期的遗传规律,以自交系N6和BT-1为亲本组配了重组自交系(Recombinantinbredline,RIL)群体,利用207个微卫星标记构建分子标记遗传连锁图谱,对生育期相关的抽雄、吐丝和散粉3个性状进行QTL定位,并进行上位性效应分析。结果表明,在第1染色体umc1676-umc1590区域和第2染色体的umc1422-umc1776区域存在共同控制抽雄、吐丝和散粉3个性状的稳定的QTL位点。生育期3个性状QTL的上位性分析,都检测到3对加性×加性上位性互作效应,分别可以解释3.78%~5.43%,1.24%~2.36%和3.27%~4.04%的表型遗传变异。上位性效应是生育期性状的重要遗传基础。

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