作物学报 ›› 2010, Vol. 36 ›› Issue (2): 256-260.doi: 10.3724/SP.J.1006.2010.00256
石云素,于永涛,宋燕春,刘志斋,黎裕,王天宇
SHI Yun-Su,YU Yong-Tao,SONG Yan-Chun,LIU Zhi-Zhai, LI Yu,WANG Tian-Yu
摘要:
用新发现的玉米矮生种质资源矮2003×冀257构建的255个F2:3家系为作图群体, 利用114个覆盖玉米全基因组的SSR标记构建连锁图谱, 图谱总长度2 852.1 cM, 标记间平均距离为27.42 cM。2006年在北京与海南进行随机区组试验, 鉴定了255个F2:3家系成株期株高。用复合区间作图法(composite interval mapping, CIM), 对控制玉米株高性状的遗传位点进行QTL检测。在两个不同环境下均检测到相同的控制玉米株高的QTL位点3个, 分别位于第1和第2条染色体。其中在第1染色体上的1.10~1.11区段存在一个控制株高的主效QTL, 与dwarf plant8 (d8)位置相近, 在北京和海南环境下分别能够解释株高表型变异的50.5%和37.5%, 作用方式表现为显性效应。深入的序列分析结果显示, 该基因/QTL位于已知的d8基因下游20~30 cM的染色体区间, 这可能是玉米中控制株高的一个新基因。
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