Molecular cytogenetic characterization of two partial wheat Elytrigia elongata amphiploids resistant to powdery mildew
文献类型: 外文期刊
第一作者: He, Fang
作者: He, Fang;Xu, Jinqiu;Qi, Xiaolei;Bao, Yinguang;Li, Xingfeng;Wang, Honggang;Zhao, Fengtao
作者机构:
关键词: powdery mildew;Elytrigia elongata;partial amphiploid;genomic in situ hybridization
期刊名称:PLANT BREEDING ( 影响因子:1.832; 五年影响因子:1.956 )
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收录情况: SCI
摘要: Two new partial amphiploids SN20 and SN122, derived from crosses between Elytrigia elongata and common wheat Yannong15 and Shannongfu63, were found resistant to powdery mildew, a serious fungal wheat disease. Cytogenetic observations showed that each SN20 and SN122 plant had 56 chromosomes. The chromosomes in most pollen mother cells formed approximately 28 bivalents, thereby showing a high degree of cytogenetic stability. Genomic in situ hybridization using St-genomic DNA from Pseudoroegneria strigosa as a probe and ABD-genomic DNA from Chinese Spring wheat as a blocker demonstrated that the genomic formulas for the alien chromosomes in SN20 and SN122 were 2 St+10 J(S)+2J and 2 St+8 J(S)+4J, respectively. These wheat E.elongata partial amphiploids represent a potential novel source of resistance to powdery mildew for wheat breeding.
分类号: S3
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