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期 刊 ：植物遗传资源学报 2016年 17卷 4期

关键词：小麦；抗叶锈病基因；SSR；分子作图；

Keywords:wheat, leaf rust resistance gene, SSR, molecular mapping,

摘 要 ：小麦叶锈病是影响小麦产量的最主要病害之一,CIMMYT材料中的19HR WSN-76高抗小麦叶锈病，小麦抗病品系19HR WSN-76与感病品种郑州5389杂交得到F2群体，利用叶锈菌生理小种FHJP对F2群体接菌鉴定，结果显示群体的抗感比例符合3:1的理论比值，推测19HR WSN-76的抗叶锈性由一对显型基因控制，暂命名为LrHR76。利用分子标记技术和分离群体分组分析法对F2群体进行分子标记检测，位于3DL的SSR标记barc71与该抗病基因连锁，遗传距离为3.0 cM。

Abstract:Leaf rust causes yield losses in wheat crops worldwide. Wheat line 19HRWSN-76 was resistant to most tested Puccinia triticina races. To identify the resistance gene 19HRWSN-76 was crossed with the leaf rust susceptible wheat line Zhengzhou 5389. A single dominant gene for resistance was identified in segregating F2 population from this cross and tentatively designated LrHR76. The resistance gene initially located on chromosome 3DL based on the SSR marker barc71. The genetic distance between LrHR76 and barc71 is 3.0 cM.

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