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Molecular cytogenetic characterization of two partial wheat Elytrigia elongata amphiploids resistant to powdery mildew

文献类型： 外文期刊

作者： He, Fang 1 ; Xu, Jinqiu 1 ; Qi, Xiaolei 1 ; Bao, Yinguang 1 ; Li, Xingfeng 1 ; Zhao, Fengtao 2 ; Wang, Honggang 1 ;

作者机构： 1.Shandong Agr Univ, Coll Agron, Taian Subctr Natl Wheat Improvement Ctr, State Key Lab Crop Biol,Shandong Key Lab Crop Bio, Tai An 271018, Shandong, Peoples R China

2.Shandong Acad Agr Sci, Jinan 25010

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.

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