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水稻极晚抽穗期基因的鉴定和遗传分析

SHANDONG AGRICULTURAL SCIENCES(2009)

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Abstract
水稻抽穗期是重要的农艺性状.本研究以一个带有华粳籼74遗传背景的单片段代换系为试验材料,对水稻抽穗期基因进行评价,发现单片段代换系W06-26-35-1-5-2带有极晚抽穗期基因,在山东种植,抽穗期稳定且表现为晚抽穗.该代换系的代换区间为PSM152- PSM154-PSM155-RM25-RM547-RM72-RM404,在第8染色体上带有抽穗期基因qHD8-1.对该代换系与受体亲本华粳籼74杂交发展的F2分离群体的单株进行抽穗期鉴定,发现晚抽穗和早抽穗单株数符合3:1的分离比,说明晚抽穗为一个显性基因控制.
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