文献类型： 外文期刊

作者： Dai, Cheng ¹ ; Gao, Ainong ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

2.Yunnan Acad Agr Sci, Inst Food Crops, Kunming 650205, Peoples R China

关键词： Wheat;Agropyron cristatum;6P;Translocation lines;Synteny

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

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收录情况： SCI

摘要： To improve genetic diversity of wheat and produce chromosome translocation lines with chromatin from Agropyron cristatum, this study screened progenies of a wheat line SM2-244 known to carry a reciprocal wheat-A. cristatum 5A. 6P chromosome translocation with increased fertile tiller number and grain number per spike. Genomic in situ hybridization (GISH) showed that these progenies contained four new types of translocation chromosomes, labeled as TC-A, TC-L, TC-S and TC-T. The long arm of chromosome 6P originally present in the 5A. 6P translocation was subdivided into three segments between relative arm length points 0-0.32, 0.32-0.69, 0.69-1 on the centromere to telomere axis. Screening with 6P-specific EST markers allocated 24, 30, 20 and 56 EST markers to segments C-6PL-0.32, 6PL-0.32-0.69, 6PL-0.69-1, and 6PS, respectively, and markers specific to individual arms were also identified. This study provides experimental resources and tools for mining of desirable genes on the A. cristatum chromosome 6P that can be exploited in wheat breeding.