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Molecular Characterization of a New Wheat-Thinopyrum intermedium Translocation Line with Resistance to Powdery Mildew and Stripe Rust

文献类型： 外文期刊

作者： Zhan, Haixian 1 ; Zhang, Xiaojun 2 ; Li, Guangrong 1 ; Pan, Zhihui 1 ; Hu, Jin 2 ; Li, Xin 2 ; Qiao, Linyi 2 ; Jia, Juqin 1 ;

作者机构： 1.Univ Elect Sci & Technol China, Sch Life Sci & Technol, Chengdu 610054, Peoples R China

2.Shanxi Acad Agr Sci, Crop Sci Inst, Taiyuan 030031, Peoples R China

3.Shanxi Agr Univ, Coll Agron, Taigu 030801, Peoples R China

4.Minist Agr, Key Lab Crop Gene Resources & Germplasm Enhanceme, Taiyuan 030031, Peoples R China

关键词： wheat;Thinopyrum intermedium;translocation line;powdery mildew;stripe rust;in situ hybridization

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2015 年 16 卷 1 期

页码：

收录情况： SCI

摘要： A new wheat-Thinopyrum translocation line CH13-21 was selected from the progenies derived from a cross between wheat-Th. intermedium partial amphiploid TAI7047 and wheat line Mianyang11. CH13-21 was characterized by using genomic in situ hybridization (GISH), multicolor-GISH (mc-GISH), multicolor-fluorescence in situ hybridization (mc-FISH) and chromosome-specific molecular markers. When inoculated with stripe rust and powdery mildew isolates, CH13-21 displayed novel resistance to powdery mildew and stripe rust which inherited from its Thinopyrum parent. The chromosomal counting analyses indicated that CH13-21 has 42 chromosomes, with normal bivalent pairing at metaphase I of meiosis. GISH probed by Th. intermedium genomic DNA showed that CH13-21 contained a pair of wheat-Th. intermedium translocated chromosomes. Sequential mc-FISH analyses probed by pSc119.2 and pAs1 clearly revealed that chromosome arm 6BS of CH13-21 was replaced by Thinopyrum chromatin in the translocation chromosome. The molecular markers analysis further confirmed that the introduced Th. intermedium chromatin in CH13-21 belonged to the long arm of homoeologous group 6 chromosome. Therefore, CH13-21 was a new T6BS. 6Ai#1L compensating Robertsonian translocation line. It concludes that CH13-21 is a new genetic resource for wheat breeding programs providing novel variation for disease resistances.

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