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Molecular Cytogenetic Characterization of a New T2BL center dot 1RS Wheat-Rye Chromosome Translocation Line Resistant to Stripe Rust and Powdery Mildew

文献类型： 外文期刊

作者： Wang, Chunmei 1 ; Zheng, Qi 2 ; Li, Lihui 3 ; Niu, Yongehun 4 ; Wang, Haibo 6 ; Li, Bin 2 ; Zhang, Xiaotian 1 ; Xu, Yunfe 1 ;

作者机构： 1.CAS, IGDB, Ctr Agr Resources Res, Shijiazhuang 050021, Peoples R China

2.Chinese Acad Sci, IGDB, State Key Lab Plant Cell & Chromosome Engn, Beijing 100101, Peoples R China

3.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China

4.Chinese Acad Agr Sci, Inst Plant Protect, Beijing 100193, Peoples R China

5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

6.Hebei Acad Agr & Forestry Sci, Inst Genet & Physiol, Shijiazhuang 050051, Peoples R China; Chinese Acad Sci, Beijing 100101, Peoples R China

期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）

ISSN： 0191-2917

年卷期： 2009 年 93 卷 2 期

页码：

收录情况： SCI

摘要： Wheat (Triticum aestivum) genotypes with rye (Secale cereale) 1RS chromosomal translocations are widely used in wheat breeding programs because 1RS carries genes for resistance to several diseases. However, some of the pathogens have evolved into new races that overcome the resistance due to extensive use of cultivars with the resistance genes from rye. Therefore, identification and deployment of new resistance sources with desirable agronomic characteristics are important and urgent. We have used winter rye cultivar German White as a source of genes for desirable traits in wheat improvement. A new genotype named WR04-32 was produced through hybridization and chromosome manipulation between common winter wheat cultivar Xiaoyan 6 and German White. This genotype was highly resistant to a wide spectrum of the wheat stripe rust (Puccinia striiformis f. sp. tritici) and powdery mildew (Blumeria graminis f. sp. tritici) pathotypes prevalent in China. The polymerase chain reaction (PCR) result using EST-STS (expressed sequence tag-site tagged sequence) marker STS(WE126) specific to 1RS confirmed 1RS in WR04-32. and it was further proved to be a wheat-rye T2BL center dot 1RS translocation line using sequential genomic in situ hybridization (GISH) and multicolor fluorescence in situ hybridization (FISH) with probes pAs1 and pSc119.2 (or pHvG38). In addition to its resistance to stripe rust and powdery mildew, WR04-32 was genetically stable and had desirable agronomic traits, making it a desirable germplasm for wheat breeding.

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