小偃6号高温下抗条锈性的遗传分析  

Inheritance analysis of stripe rust resistance of wheat cultivar Xiaoyan 6 under the high temperature

作　　者：姚秋燕[1] 徐智斌[1] 王美南[1] 井金学[1] 商鸿生[1] 

机构地区：[1]西北农林科技大学植物保护学院与陕西省农业分子生物学重点实验室,陕西杨凌712100

出　　处：《植物保护学报》2006年第2期117-121,共5页Journal of Plant Protection

基　　金：陕西省科技攻关课题(2005k02-G01-01);教育部长江学者和创新团队发展计划(IRT0558)

摘　　要：小偃6号是20世纪70年代末利用长穗偃麦草基因育成的小麦品种,具有高温抗条锈性,研究其抗条锈遗传基础,对揭示其抗病机制和培育持久抗病品种有重要意义。本研究采用常规杂交分析方法,在20～22℃条件下,用小麦条锈菌系CY29、CY30、CY31、CY32和Su-4分别接种小偃6号、铭贤169及其杂交F2代各株系幼苗,对小偃6号进行了抗条锈性遗传分析。结果表明,小偃6号对菌系CY31、CY29和Su-4的抗病性是由1显1隐2对基因独立遗传控制;对菌系CY30和CY32的抗病性由2对互补显性基因控制。此研究结果为选育持久抗病品种提供了必要的遗传信息,建议作为抗源在抗病育种中加以利用。Xiaoyan 6 is an elite wheat cultivar with high-temperature resistance to stripe rust, developed by using exogenous genes from Elytrigia elongata at the end of 70 ＇s last century. Inheritance of stripe rust resistance gene in Xiaoyan 6 is important for revealing mechanism of resistance to stripe rust and developing durable cuhivar. In controlling temperature （ 20 - 22℃ ） , seedlings of Xiaoyan 6, Mingxian 169 and their F2 progeny were tested with Chinese races （ CY29, CY30, CY31, CY32 and Su-4） of Puccinia striiformis f. sp. tritici. The results indicated that the resistance of Xiaoyan 6 to CY31, CY29 and Su-4 is controlled by one dominant gene and one recessive gene, and two complementary dominant genes to CY32 and CY30 in Xiaoyan 6. Xiaoyan 6 as resistant resource and its genetic information should be useful in breeding durable resistant cultivar to stripe rust.

关 键 词：小偃6号 小麦条锈菌 高温抗条锈性 遗传分析 

分 类 号：S512.1[农业科学—作物学]