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小麦新品种春化和光周期基因组成以及春化基因与产量性状的关系

Composition of Vernalization and Photoperiod-related Genes of New Wheat Varieties and Correlation Analysis for Photoperiod-related Genes with Yield

  • 摘要: 为研究春化和光周期基因在河南省小麦新品种中的分布特点及春化基因与产量性状的关系,以近年河南省冬小麦品种区域试验的118份小麦品种为材料,用STS标记对4个春化基因位点(Vrn-A1,Vrn-B1,Vrn-D1和Vrn-B3)和1个光周期基因位点(Phd-D1)进行检测,并结合供试材料的农艺性状,分析近年来河南省小麦新品种春化基因组成及其与品种的冬春性、苗穗期及产量性状的相关性。结果表明,供试的118份小麦品种在Phd-D1、Vrn-A1、Vrn-B3位点均为隐性等位变异;含有显性等位变异Vrn-B1的品种有9份,其分布频率为7.62%,且均表现为弱春性;含有显性等位变异Vrn-D1的品种有41份,其分布频率为34.7%,这些品种中有21份表现为弱春性;进一步的分析表明,显性等位变异Vrn-D1与苗穗期显著负相关,与产量构成各要素正相关,但未达显著水平;显性等位变异Vrn-B1与产量构成要素中的成穗数和穗粒数负相关,而与千粒重正相关,但均未达显著水平。

     

    Abstract: Absract:In order to investigate distribution characteristics of vernalization and photoperiod-related genes and their relationship with yield in new wheat varieties in Henan province, four vernalization-related loci(Vrn-A1, Vrn-B1, Vrn-D1 and Vrn-B3) and one photoperiod-related loci(Phd-D1) were detected by STS markers in 118 wheat varieties from the regional test area of winter wheat varieties in Henan province in recent years. Combined with the agronomic traits of the tested materials, the composition of vernalization-related genes of new wheat varieties in Henan province in recent years and its correlation with winter-spring characteristic, seedling-heading period and yield of the varieties were also analyzed. The results showed that the loci of Phd-D1、Vrn-A1、Vrn-B3 were recessive allelic variation. There were 9 varieties contained dominant allelic variation of Vrn-B1 loci, with a distribution frequency of 7.62%, and all of them showed weak vernalization. Additionally, there were 41 varieties contained dominant allelic variation of Vrn-D1 with a distribution frequency of 34.7%, and 21 of these varieties showed weak vernalization. Further analysis showed that the dominant allelic variation of Vrn-Dl loci was negatively correlated with seedling-heading stage and positively correlated with yield components, but not significantly. And, the dominant allelic variation of Vrn-Bl loci was negatively correlated with productive tiller number and kernels per spike, and positively correlated with 1000-grain weight, but but not significantly.

     

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