【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。更多还原

【Abstract】 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 cultivar. 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.更多还原