番茄疮痂病抗性遗传和基因定位最新进展.doc

文档介绍：
番茄疮痂病抗性遗传和基因定位最新进展#
杨文才*
(中国农业大学农学与生物技术学院蔬菜学系,设施蔬菜生长发育调控北京市重点实验室,
5
10
北京 100193)
摘要:由黄单胞杆菌(Xanthomonas)引起的番茄疮痂病是严重影响番茄生产的一种细菌性
病害。近年来,该病害病原菌小种的快速变化,特别是 X. gardneri 的扩散,加速了人们对抗
性遗传、基因定位和分子标记辅助育种的研究工作。迄今已经定位了 3 个抗 T3 小种的基因、
4 个抗 T3 小种的 QTL 和 3 个抗 T4 小种的 QTL,并对部分基因或 QTL 进行了精细定位,建
立了标记辅助选择体系,育成了抗 T4 小种的品种。本文将就这些最新的研究进展进行总结,
对现存问题进行分析,并对番茄疮痂病抗性遗传研究和育种应用前景进行探讨,以期为抗番
茄疮痂病育种提供参考。
关键词:蔬菜学;番茄疮痂病;抗性遗传;基因;QTL;进展
中图分类号:
15
Recent advance on ics and mapping of resistance to
bacterial spot in tomato
Yang Wencai
(Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops,
20
25
30
35
40
Department of Vegetable Science, College of Agriculture and Biotechnology, China Agricultural
University, Beijing 100193)
Abstract: Bacterial spot caused by Xanthomonas is a bacterial disease that severely affects tomato
production. In recent years, the rapid changes of the races in the pathogen of the disease,
particularly the spread of X. gardneri, facilitated the work on ics of resistance, mapping of
genes, and marker-assisted breeding for resistance to the disease in tomato. To date, three genes
and four QTLs conferring resistance to race T3 as well as three QTLs for resistance to race T4
have been mapped, some of them have been finely mapped, marker-assisted selection system has
been established, and varieties with resistance to