西藏41个小麦品种(系)抗条锈病基因的分子检测

Molecular detection of stripe rust resistance genes in 41 wheat varieties from Tibet

小麦条锈病是西藏小麦生产的重要病害之一。明确西藏当前主要小麦品种的抗条锈病基因及抗锈特性，对抗源材料的合理布局和利用以及持久抗条锈病品种的选育具有重要的意义。

In order to investigate the resistance of main wheat cultivars to wheat stripe rust in Tibet, and identi- fy the existing Yr resistance genes in these plant varieties, 41 of wheat cultivars （lines） were evaluated for reSistance level on adult plants under field conditions in Linzhi during 2011-2013, and the evaluation was conducted by using the known SSR markers linked with rust resistance genes Yr1, Yr5, Yr9, Yr10, Yr15, Yr18 and Yr26. The results showed that Yr1, Yr5, Yr9, Yr10, Yr15, Yr18 and Yr26 could be detected at a frequency of 4.4%, 4.9%, 17.1%, 0%, 19.5%, 14.6% and 36.6%, respectively. The resistance performance of wheat varieties in the field combined with the Yr gene detection results showed that two materials possibly carried Yr5, six materials possibly carded Yr9, three materials possibly carded Yr15, five materials possibly carried Yr18, two materials possibly carded Yr26, and eight materials including Zang 178 and 43351 displayed high or very high level of resistance, in which other unknown new resistance genes might be contained.