Identification, Characterization, and Evaluation of Novel Stripe Rust-Resistant Wheat-Thinopyrum intermedium Chromosome Translocation Lines

文献类型： 外文期刊

第一作者： Zheng, Xingwei

作者： Zheng, Xingwei;Tang, Caiguo;Zhao, Jiajia;Qiao, Ling;Zheng, Jun;Han, Ran;Liu, Cheng;Zhang, Shuwei;Qiao, Linyi;Ge, Chuan

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关键词： cereals and grains; cultivar/resistance; disease management; field crops; fungi; genomic in situ hybridization; stripe rust; Thinopyrum intermedium

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： 2020 年 104 卷 3 期

页码：

收录情况： SCI

摘要： Stripe rust is an important disease in wheat, and development of genetic resistance in cultivars is an effective approach to control the disease. Wild species of wheat, such as Thinopyrum intermedium, are an excellent gene source for wheat improvement. In this study, two stripe rust-resistant wheat-Th. intermedium chromosome translocation lines, CH4131 and CH4132, were characterized by cytogenetic and pathological methods. The introgressed chromosome fragment was tagged using amplified fragment-length polymorphism-derived sequence-characterized amplified region (SCAR) markers and intron targeting markers, indicating that CH4131 and CH4132 both possess a homologous group 3 chromatin of Th. intermedium. Genomic in situ hybridization results suggested that a very small Th. intermedium chromosome segment was translocated to the terminal region of wheat 1BS for both lines, forming a configuration of T3Ai-1BS.1BL. The two translocation lines were resistant to stripe rust, and the resistance gene, temporarily designated YrCH-1BS, was likely derived from Th. intermedium. The translocated chromosome fragments have no genetic linkage drag to agronomic performance. The grain quality indexes of these two translocations were higher than local wheat varieties. Therefore, CH4131 and CH4132 could be used as potential gene sources in wheat improvement programs. The SCAR markers are useful to select stripe rust resistance from Th. intermedium.

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[1]Identification, Characterization, and Evaluation of Novel Stripe Rust-Resistant Wheat-Thinopyrum intermedium Chromosome Translocation Lines. Zheng, Xingwei,Tang, Caiguo,Zhao, Jiajia,Qiao, Ling,Zheng, Jun,Han, Ran,Liu, Cheng,Zhang, Shuwei,Qiao, Linyi,Ge, Chuan. 2020

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