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棉花学报  2010 

转基因抗虫棉黄萎病田间消长模式研究

DOI: 1002-7807(2010)05-0509-04, PP. 509-509

Keywords: 转基因抗虫棉,黄萎病,消长模式

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Abstract:

2008年和2009年利用田间病圃研究了17个转基因抗虫棉品种的黄萎病田间消长模式。基于各品种在不同调查时间点的2年病情指数进行聚类分析,可将供试品种划分为4种类型。分析发现,同一类型中不同品种的黄萎病田间消长模式相似,而不同类型间表现出明显差异。第Ⅰ类品种表现为在调查的前、中、后期病情指数较低,且其病指低于其它3类;第Ⅱ类品种在整个调查时期病情指数也较低,但全年有2个发病高峰;第Ⅲ类品种在调查前期病指较高,中期病指略有降低,后期病指快速上升,发病高峰期病指较高,其病指在整个调查时期高于第Ⅱ类;第Ⅳ类品种调查前期病指较高,中期病指降低,后期病指最高,全年有2个明显的发病高峰,且其病指在8月20日前的几个调查时期均显著高于其它3种类型。

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