人工合成小麦RIL群体对条锈病新小种条中32的抗性表现  

Resistance evaluation of RILs developed from a synthetic wheat Syn-CD 780×T.aestivum L.cv.Chuanyu 12 to Chinese new stripe rust race CYR32

作　　者：汤永禄[1] 杨武云[1] 曾云超[1] 李朝苏[1] 彭云良[2] 邹裕春[1] 陈放[3] 

机构地区：[1]四川省农业科学院作物研究所,四川成都610066 [2]四川省农业科学院植保研究所,四川成都610066 [3]四川大学生命科学学院,四川成都610064

出　　处：《西南农业学报》2007年第2期266-269,共4页Southwest China Journal of Agricultural Sciences

基　　金：四川省青年基金;四川省应用基础项目

摘　　要：利用人工合成六倍体小麦资源Syn-CD780与感病品种川育12杂交,构建了一套重组近交系（F8,131个株系）。2004~2006年,就重组近交系对条锈病优势生理小种条中32进行了苗期和成株期抗性鉴定。结果表明：苗期抗感比例为3.09∶1,卡方值0.0230,成株期抗感比例为1.42∶1,卡方值0.3403,二者均达极显著水平。由此推断Syn-780含有1对苗抗基因,而成株期抗性则可能由2对显性互补基因控制。有关抗性基因的来源有待进一步深入研究。Stripe rust,caused by Puccinia striiformis West. ,is a worldwide wheat disease and one of the greatest constraints to wheat production of Sichuan province, China. With the purpose of identifying and utilizing genes for resistance to the disease, a population of 131 Fs recombinant inbred lines developed from a synthetic wheat Syn-CD780 x T. aestivum L. cv. Chuanyul2 was visually evaluated for seedling and adult-plant resistance to Chinese new stripe rust race CYR32 during 2004 - 2006. The results illustrated the 3：1 and 9：7 segregation ratios for the pooled resistant vs. susceptible line classes,respectively. It could be drawn from this analysis that the resistance at seedling of Syn-780 to CYR32 was controlled by one dominant gene and the resistance at adult-pant resistance to the same stripe rust race was controlled by two complementary dominant genes. The synthetics Syn-CD780 can be used as resistant germplasm resource for wheat breeding in China.

关 键 词：人工合成六倍体小麦 RIL群体 条中32 

分 类 号：S512.1[农业科学—作物学]