30个小麦新品系抗条锈病基因分析及成株期抗病性评价

 小麦条锈病是影响我国小麦生产的重要病害之一，利用抗病品种是控制小麦条锈病流行的最经济有效的措施。逐步澄清我国小麦品种抗病基因组成及特点是合理利用抗病品种的基础。

Analysis of resistance genes and identification at adult stage to stripe rust in 30 new wheat lines

Seedlings of 30 new wheat lines were inoculated with 21 selected races of Puccinia striiformis to postulate stripe rust resistance genes. The results indicated that a total of 15 probable seedling stripe rust resistance genes or gene combination, including Yr1, Yr2, Yr3, Yr2+6, Yr2+HVⅡ, Yr5, Yr7, Yr8, Yr9, Yr10, Yr21, Yr24, Yr27, Yr32 and YrSD, were detected. Yr21, the most common gene, presented in 10 lines, Yr27 in six lines and Yr1 in five lines. There are 6 lines which can resist all the tested races. Xingtai 456 and Chuan 09023 have very widely resistance spectrum, but different from that of any known gene carriers, indicating that the two varieties contained new resistance gene. In adult, except Zhen 06088 and Yang 08-6, the other wheat lines showed high resistance or immunity to mixed races. These results can further understand the resistance genes and distribution in new wheat lines, and provide information for resistance breeding and reasonable deployment of resistance gene to wheat stripe rust.