14个小麦品种(系)抗叶锈性分析

Analysis of Wheat Leaf Rust Resistance Genes in 14 Wheat Cultivars or Lines

选用16个小麦叶锈菌菌系对14个小麦品种(系)进行抗叶锈性鉴定和苗期抗叶锈基因推导,初步分析这些品种(系)的抗性和携带的抗病基因;进一步利用21个与Lr基因紧密连锁或共分离的分子标记,对这14个品种(系)中可能含的抗叶锈基因进行鉴定。结果表明,s98351-2-2-2-1可能含Lr3a、Lr28和Lr50;9629-03A-4-1-1可能含Lr37;97167-1-2-1-1-2-1、919-20-2c2、9589、免中438、9916-8-6和9916-8-18含Lr26;96104-1-5-1c2可能含Lr28;00-55-3-1-1含Lr1;1R13可能含Lr24、Lr37和Lr38;1R17可能含Lr24和Lr38;1R35含Lr10和Lr34,还可能含Lr3a和Lr50;9524-1-2-2-1含未知抗叶锈基因或本试验使用的已知抗病基因以外的抗叶锈基因。所有品种(系)均不含Lr9、Lr19、Lr20、Lr21、Lr29、Lr35、Lr42和Lr47基因。测试的14个品种(系)中有比较丰富的抗叶锈病基因,可为育种提供丰富的抗源。

The objective of this study was to detect resistance genes to leaf rust in 14 wheat cultivars or lines.The resistance of the 14 wheat cultivars or lines was investigated at seedling and adult stages,and the resistance genes at seedling stage were postulated by inoculating 16 races of Puccinia triticina.Further validation was conducted using 21 molecular markers cosegregated with or closely linked to the known Lr genes.According to the results of both phenotypic identification and molecular marker data,the information of the resistance genes in the 14 cultivars or lines was obtained.Genes Lr3a,Lr28,and Lr50 were postulated in s98351-2-2-2-1.Gene Lr37 was possibly carried by 9629-03A-4-1-1.Lr26 was present in 97167-1-2-1-1-2-1,919-20-2c2,9589,Mianzhong 438,9916-8-6,and 9916-8-18.Lr28 was possibly present in 96104-1-5-1c2.Lr1 was contained in 00-55-3-1-1.Lr24,Lr37,and Lr38 were possibly in 1R13.Lr24 and Lr38 were possibly carried by 1R17.Gene Lr10 and Lr34 were detected in 1R35,and Lr3a and Lr50 were also postulated in 1R35.Besides,9524-1-2-2-1 might contain unknown or untested resistance genes against P.triticina pathotypes.Genes Lr9,Lr19,Lr20,Lr21,Lr29,Lr35,and Lr42 were not present in all cultivars or lines.The results indicate that these cultivars and lines carry diverse resistance genes to wheat leaf rust,and can be used as resistance re-source for resistance breeding.