小麦品种多样性对白粉病及产量和蛋白质的影响

 对品种多样性控制小麦白粉病的效果以及对产量和蛋白质的影响进行了研究，为利用品种多样性控制白粉病提供理论依据和技术支持。采用SSR技术分析5个小麦品种的亲缘关系；2008年和2009年按组合所含品种数为2、3、4和5个进行组合，在田间种植混种组合和单播小区，人工接种白粉菌，比较各小区中小麦白粉病的AUDPC值、产量和蛋白质变化。结果表明，5个品种亲缘关系相对较近；2个品种混合时以抗感搭配较好，随着抗病品种比例增加控病效果增强；2008年混合种植中有防治效果的组合占54.55%，相对防效为10.02%~47.58%，2009年有防治效果的组合占23.08%，相对防效在1.85% 到18.96 % 之间；在适当的组合中，如京冬8号/轮选987、京双16/京411/京冬8号对小麦白粉病有控制效果，混种不会影响产量和蛋白质含量；当有大量能克服本地品种抗性的外来菌源时混合种植的控病效果降低。品种多样性可以用做防治小麦白粉病的一项措施。

Effect of wheat cultivar mixtures on powdery mildew, yield and grain protein content

To provide a theoretical basis for the use of cultivar diversity on wheat powdery mildew control,the effects of cultivar diversity on wheat powdery mildew,the yield and the protein content of wheat were studied.The genetic relationship of five wheat cultivars was studied by SSR.Mixtures of two,three,four or five winter wheat cultivars and their pure stands were exposed to mixed powdery mildew races in 2007-2008 and 2008-2009.The changes of AUDPC value,yield and protein content were investigated.The results ...