小麦品种耐寒性与春化VRN-1等位基因的关系研究

Relationship Analysis between Cold Hardiness and Vernalization VRN-1 Alleles in Wheat Varieties

以来自11个省份的134个小麦品种为试验材料,于2009-2010年在石家庄种植,调查冻害情况;并利用分子标记鉴定VRN-1等位基因组成,以明确小麦品种春化VRN-1等位基因组成与耐寒性的关系。结果表明:小麦品种的耐寒性与其VRN-1等位基因组成、地理来源和耐旱性等因素有密切关系。当地理来源相同时,品种的耐寒性一般随着VRN-1等位基因控制的春化效应的增强而减弱;当VRN-1等位基因组成相同时,品种的耐寒性一般随着地理来源的纬度降低而减弱。本研究结果为小麦品种的耐寒性改良提供了重要参考。

In order to clarify the effects of VRN-1 vernalization genes on cold hardiness of wheat,the freeze injury of 134 wheat cultivars collected from 11 main producing provinces was investigated in shijiazhuang during the period of 2009 - 2010. The VRN-1 alleles composition was identified using the sequence-specific markers which made its re- lationship with cold hardiness definite. The results indicated that the cold hardiness of cuhivars was closely related to composition of VRN-1 alleles,geographic origin, and drought tolerance. As in the same geographical origin, the cold hardiness of eultivars was generally weakened with the enhancement of vernalization effects controlled by VRN-1 al- leles. Besides,cold hardiness of cultivars with same VRN-1 alleles were always weakened with the lower latitude of ge- ographical origin. These results should be helpful to cold hardiness improvement of wheat cultivars.