4.7 Article

Assessment of Resistance to Cereal Cyst Nematode, Stripe Rust, and Powdery Mildew in Wheat-Thinopyrum intermedium Derivatives and Their Chromosome Composition

期刊

PLANT DISEASE
卷 105, 期 10, 页码 2890-2898

出版社

AMER PHYTOPATHOLOGICAL SOC
DOI: 10.1094/PDIS-10-20-2141-RE

关键词

cereal cyst nematode; cytological analysis; disease resistance; powdery mildew; stripe rust; wheat-Thinopyrum intermedium derivatives

资金

  1. Agricultural Sci-tech Innovation Research Program of Shanxi Agricultural University [YGJPY2002, ZS1110]
  2. Key Research and Development Program of Shanxi Province [201903D221094, 201903D211003, 201903D211004-2]
  3. National Key Research and Development Project [2017YFD0101002]
  4. Agricultural Science and Technology Innovation Program [CAAS-ZDRW202002]

向作者/读者索取更多资源

Wide hybridization between wheat and wild relatives such as Thinopyrum intermedium is crucial for broadening genetic diversity and enhancing disease resistance. The newly developed wheat-Th. intermedium derivatives showed resistance to multiple pathogens, providing valuable materials for wheat resistance breeding programs. Genomic analyses revealed the chromosome compositions of the resistant lines, contributing to the development of disease-resistant wheat varieties.
Wide hybridization between wheat and wild relatives such as Thinopyrum intermedium is important for broadening genetic diversity and improving disease resistance in wheat. We developed 30 wheat-Th. intermedium derivatives. Here, we report assessments of their resistance to different pathogens including cereal cyst nematode (CCN; Heterodera spp.), Puccinia striiformis f. tritici Erikss. causing stripe rust, and Blumeria graminis f. tritici (DC.) Speer inciting powdery mildew. Under natural field infection, all the wheat-Th. intermedium lines were resistant to at least one of the pathogens, and four lines were resistant to multiple pathogens. Twenty-nine of 30 tested lines exhibited resistance to H. avenae, a dominant CCN species in wheat fields. Twenty-four lines were resistant to H. filipjevi, an emerging threat to wheat production. Tests of phenotypic responses in the naturally infected field nurseries identified six stripe rust-resistant lines and 13 powdery mildew-resistant lines. Mitotic observation demonstrated that these newly developed wheat-Th. intermedium derivatives included not only octoploid but also chromosome addition, substitution, and translocation lines. Chromosome compositions of the four lines resistant to multiple pathogens were analyzed by genomic in situ hybridization and fluorescence in situ hybridization. The octoploid lines Zhong 10-68 and Zhong 10-117 carried both intact Th. intermedium chromosomes and translocated chromosomes. Line Zhong 10-149 had 42 wheat chromosomes and two wheat ditelosomes plus a pair of T3BS.J translocated chromosomes. Line Zhong 10-160 carried 41 wheat chromosomes plus one pair of the J genome chromosomes of Th. intermedium. The multiple disease-resistant wheat-Th. intermedium derivatives, especially lines with chromosome counts close to that of common wheat, provide valuable materials for wheat resistance breeding programs.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据