Molecular characterization of a wheat -Thinopyrum ponticum partial amphiploid and its derived substitution line for resistance to stripe rust

文献类型： 外文期刊

第一作者： Hu, Li-Jun

作者： Hu, Li-Jun;Li, Guang-Rong;Zeng, Zi-Xian;Liu, Cheng;Yang, Zu-Jun;Chang, Zhi-Jian

作者机构：

关键词： C-banding;In situ hybridization;Stripe rust resistance;Thinopyrum ponticum

期刊名称：JOURNAL OF APPLIED GENETICS （ 影响因子：3.24； 五年影响因子：2.756 ）

ISSN： 1234-1983

年卷期： 2011 年 52 卷 3 期

页码：

收录情况： SCI

摘要： Stripe rust (caused by Puccinia striiformis) occurs annually in most wheat-growing areas of the world. Thinopyrum ponticum has provided novel rust resistance genes to protect wheat from this fungal disease. Wheat - Th. ponticum partial amphiploid line 7430 and a substitution line X005 developed from crosses between wheat and 7430 were resistant to stripe rust isolates from China. Genomic in situ hybridization (GISH) analysis using Pseudoroegneria spicata genomic DNA as a probe demonstrated that the partial amphiploid line 7430 contained ten J(s) and six J genome chromosomes, and line X005 had a pair of J(s)-chromosomes. Giemsa-C banding further revealed that both lines 7430 and X005 were absent of wheat chromosomes 6B. The EST based PCR confirmed that the introduced J(s) chromosomes belonging to linkage group 6, indicating that line X005 was a 6J(s)/6B substitution line. Both resistance observation and sequence characterized amplified region (SCAR) markers displayed that the introduced chromosomes 6J(s) were responsible for the stripe rust resistances. Therefore, lines 7430 and X005 can be used as a donor in wheat breeding for stripe rust resistance.

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