土耳其8个小麦品种农艺性状及抗叶锈性分析

为确定8个来自土耳其的普通小麦品种在我国的应用前景,对其进行全生育期农艺性状观察,并利用44个以Thatcher为背景的近等基因系(单基因系)作为已知基因的鉴别寄主,接种8个小麦叶锈菌致病型进行苗期抗叶锈基因推导,结合成株期抗病鉴定,初步明确了这些品种(系)的抗性和可能携带的抗病基因。利用20个与Lr基因紧密连锁或共分离的分子标记,对8个土耳其小麦品种进行抗叶锈病基因的进一步鉴定。推测YJ000900中可能含有Lr1、Lr3、Lr17、Lr20;YJ000906中可能含有Lr1、Lr17、Lr20;YJ000901、YJ000902、YJ000904、YJ000905、YJ000907中可能含有Lr1;8个材料中均不含Lr9、Lr19、Lr20、Lr21、Lr24、Lr26、Lr28、Lr29、Lr34、Lr35、Lr37、Lr38和Lr47基因。结果表明,来自土耳其的8个小麦材料具有较差的抗叶锈性、抗寒和抗倒伏能力,而且产量低,不适宜于大规模推广种植,也不能作为我国小麦抗叶锈的抗源使用。

Agronomic Traits and Wheat Leaf Rust Resistance of Ten Turkey Wheat Accessions

To evaluate the leaf rust resistance and the application prospect of eight wheat cultivars from Turkey,the agronomic traits were surveyed in whole growth period for two years and forty-four near isogenic lines(or single gene lines)in Thatcher background with known wheat leaf rust resistance genes were used as differential hosts.All genotypes were inoculated with eight pathotypes of Puccinina triticina at seedling stage.The results indicated that Lr1,Lr3,Lr17,Lr20 and some unknown resistance genes might present in the 8 accessions.As revealed by 20 molecular markers closely linked or co-segregated with part of the known Lr genes,the 8 accessions from Turkey were postulated to carry 4 resistance genes,such as Lr1,Lr3,Lr17 and Lr20 in YJ000900,Lr1,Lr17 and Lr20 in YJ000906,Lr1 in YJ000901,YJ000902,YJ000904,YJ000905 and YJ000907.However,Lr9,Lr19,Lr20,Lr21,Lr24,Lr26,Lr28,Lr29,Lr34,Lr35,Lr37,Lr38 and Lr47 were not detected in the 8 accessions.The results showed that 8 wheat accessions from Turkey have poor resistance to wheat leaf rust,cold hardiness and lodging,and low production.These indicate that the test accessions are not suitable for releasing in China and for leaf rust resistance resource.