山西省小麦主栽品种抗叶锈病研究

选用14个具有不同毒性基因组合的叶锈菌系,推导分析了来自山西省6个育种单位和种子部门的24个重要小麦品种所携带的抗叶锈病基因状况。在供试的44个已知抗叶锈病基因(或基因组合)中,推导出了Lr1,Lr3,Lr13,Lr23,Lr26,Lr30等6个抗叶锈病基因,以单基因或基因组合形式分别分布在19个小麦品种中,其中Lr1,Lr3,Lr26是供试材料的主要已知抗叶锈病基因。成株期抗病性鉴定结果表明,在24个供试品种中,仅有晋麦62号和鲁麦14号两个品种表现出对叶锈病良好的抗性,晋麦31号、晋麦56号和晋麦61号3个品种表现为中抗至中感(杂合类型),晋春9号、晋春13号、晋偃746—9等12个品种具有慢叶锈病特征。

Leaf Rust Resistance of Major Wheat Cultivars in Shanxi Province

Genes for resistance to leaf rust(Lr) in twenty-four important wheat cultivars from six wheat breeding institutes or companies were analyzed using fourteen isolates of Puccinia triticina. Six Lr genes:Lr1,Lr3,Lr13,Lr23,Lr26,Lr30 of the fourty-four tested genes were postulated as present in nineteen wheat cultivars, either alone or in combinations. Of them, Lr1,Lr3,Lr26 were the main genes for resistance to leaf rust of the tested materials. Adult plant resistance of twenty-four wheat cultivars was identified with five Puccinia triticina pathotypes in the field. Two cultivars displayed good resistance at adult stage and three cultivars with the heterogeneous response and twelve cultivars with slow-rusting resistance.