期刊
JOURNAL OF PLANT PATHOLOGY
卷 104, 期 2, 页码 801-806出版社
SPRINGER
DOI: 10.1007/s42161-022-01101-6
关键词
Rice; Xanthomonas oryzae pv; oryzae; Xa39; Bacterial blight resistance
资金
- Improved Varieties Joint Research (Rice) Project of Anhui Province (14th five-year plan)
- National Natural Science Foundation of China [31571632, 31661143009]
- National High-tech Program of China [2014AA10A603]
- CAAS Innovative Team Award
- Science and Technology Major Project of Anhui Province [2021d06050002]
In this study, a novel dominant gene Xa39, which confers broad-spectrum resistance for bacterial blight (BB), was successfully introgressed into restorer lines of rice through marker-assisted introgression breeding method. The newly developed BB-resistant restorers and their hybrids with sterile lines exhibited similar resistance levels as the resistant donor. This study provides important reference information for utilizing the Xa39 gene in rice breeding program.
Bacterial blight (BB), which is caused by Xanthomonas oryzae pv. oryzae (Xoo), is one of the most important rice diseases in Asian countries. Developing resistant rice hybrids and cultivars is the most effective and economical strategy for controlling bacterial disease. In this study, a novel dominant gene Xa39, which confers broad-spectrum resistance for BB, was introgressed into two rice restorer lines H6X6 and H6X11 by a marker-assisted introgression breeding approach, combined with artificial inoculation with five Xoo and rigorous phenotypic selections. Finally, the two restorer lines H6X6-Xa39 and H6X11-Xa39 carrying a broader spectrum of BB resistance were developed. H6X6-Xa39, H6X11-Xa39, and their hybrid combinations with three sterile lines exhibited the same level of resistance as that of resistant donor FF329. The newly developed BB-resistant restorers and their derived hybrids with sterile lines were mostly identical to their respective original versions for agronomic traits, suggesting considerable value of the Xa39 gene in breeding BB resistance for genetic improvement of hybrid rice. Our results provide important reference information for the utilization of the Xa39 gene in rice breeding program.
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。
推荐
暂无数据