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Pi-b、Pi-ta、Pikm和Pi54对水稻穗颈瘟的抗性评价

DOI: 10.7668/hbnxb.2014.03.040, PP. 221-226

Keywords: 水稻,稻瘟病,功能标记

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Abstract:

利用水稻稻瘟病抗病基因Pi-b、Pi-ta、Pikm和Pi54的功能标记检测2012年江苏省迟熟中粳稻预试64份品系,结合水稻穗颈瘟抗性鉴定,解析稻瘟病抗病基因Pi-b、Pi-ta、Pikm和Pi54在江苏省粳稻稻瘟病抗性育种中的作用。结果表明,在64份材料中含稻瘟病基因Pi-b的有49份,含Pi-ta的26份,含Pikm的19份,含Pi54的25份。64份品系的人工或病圃鉴定其抗性表现为2级中抗的有10份,3级感病的有43份,4级高感的有11份。64份品系中含有抗稻瘟病基因Pi-ta(26个新品系),或Pi-b、Pikm和Pi54组合(4个新品系),则该品系穗颈瘟抗性水平在2级中抗或3级感病,无4级高感,其他抗病基因组合其穗颈瘟抗性水平一般都存在4级高感。相关性分析表明,只有抗稻瘟病基因Pi-ta与穗颈瘟抗性存在显著相关性(r=0.344,P<0.01)。

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