西科麦2028抗条锈性的遗传分析

西科麦2028是地理远缘小麦材料的杂交后代,具有突出的抗条锈病性能。为了解西科麦2028对小麦条锈病的抗性遗传规律,以西科麦2028和铭贤169的杂交群体为研究对象,采用我国目前小麦条锈菌流行小种CYR31、CYR32、CYR33、Su11-4对供试群体进行成株期接种,分析杂交后代的抗病性及分布情况。结果表明:西科麦2028对CYR31的抗病性由3对显性基因控制;对CYR32由2对显性和1对隐性基因控制;对CYR33由1对显性基因控制;对Su11-4由1对显性和1对隐性基因控制。

Genetic analysis of stripe rust resistance gene in wheat cultivar Xikemai2028

Abstract: To the clear of Xikemai2028 of wheat stripe rust was popular small resistance and genetic law of resistance, in order to better and more effectively provide the basis for disease resistance in wheat breeding. With wheat stripe rust was physiological small CYR31 and CYR32, CYR33 and Su11-4, in seedling stage and booting stage of Xikemai2028 induced by artificial inoculation and natural, disease resistance identification. With Xikemai2028 and infected Mingxian 169 parents for hybridization, with CYR31 and CYR32, CYR33, Su11-4 small kind of wheat stripe rust was physiology, including of F2 and F3 lines and backcross BC1F1, artificial inoculation identification of BC1F2 generations. The results:showed that the immune and nearly immune article to rust in Xikemai2028 of wheat. Controlled by the three pairs of dominant gene for CYR31 disease resistance; To CYR32 by 2 to explicit and 1 to control the recessive gene; By CYR33 1 to dominant gene control; By Su11-4 for explicit and 1 control of recessive gene.