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首页> 外文期刊>Cereal Research Communications >Eight Loci for Resistance to Ustilago tritici Race T11 Indicated in 20 Wheat Lines
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Eight Loci for Resistance to Ustilago tritici Race T11 Indicated in 20 Wheat Lines

机译：在20个小麦品系中显示了8个抗小麦白粉病T11族的位点

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摘要

Loose smut of wheat is a disease of world wide significance. Resistant cultivars constitute a potentially useful and environmentally benign method of controlling this disease. The genetic basis of resistance in 20 wheat genotypes with resistance to Ustilago tritici race T11 was studied in crosses with the widely grown but susceptible Indian cultivar, PBW 343. These lines were also involved in 10 'resistant x resistant' crosses, to infer diversity for resistance genes in this set. All 30 crosses were developed to the F-3 stage. Fifteen parents were inferred to carry dominant genes for resistance to race T11. Ten of these resistant lines (ML 521, W 59, W 1616, W 2484, W 2531, W 5915, W 6202, WL 1786, WL 2956 and WL 3450) had resistance controlled by 2 dominant genes acting in a complementary manner whereas in 4 lines (W 4461, W 5100, W 2615 and WL 3951), there was a single dominant gene and in a single genotype, WL 5907, there were 2 dominant genes with duplicate gene action governing the resistance. In lines W 2139, W 3899, W 4985, W 5450 and W 5792 a single recessive gene conferred resistance. Inheritance in two crosses, one derived from a line possessing a single dominant gene and the other from a line possessing a single recessive gene was re-analyzed and successfully confirmed in F-5 generation. The segregation of most of the 'resistant x resistant' crosses conformed to the inferences drawn about the parents in the 'resistant x susceptible' crosses.
机译：小麦黑穗病是一种世界性的疾病。抗性品种构成了控制这种疾病的潜在有用且对环境无害的方法。在与广泛种植但易感的印度品种PBW 343的杂交中研究了20种小麦基因型对小麦Uttilago T11抗性的抗性遗传基础。这些品系还参与了10个“抗性x抗性”杂交，从而推断出多样性该组中的抗性基因所有30个十字架都发展到F-3阶段。推断有15个父母携带对T11种族具有抗性的显性基因。这些抗性品系中的十个（ML 521，W 59，W 1616，W 2484，W 2531，W 5915，W 6202，WL 1786，WL 2956和WL 3450）具有由2个互补作用的优势基因控制的抗性，而在在4个品系（W 4461，W 5100，W 2615和WL 3951）中，有一个显性基因，在一个基因型WL 5907中，有2个显性基因具有重复的基因作用来控制抗性。在W 2139，W 3899，W 4985，W 5450和W 5792行中，单个隐性基因赋予抗性。重新分析了两个杂交的遗传，一个来自一个具有单一显性基因的品系，另一个来自一个具有单个隐性基因的品系，并在F-5世代中成功得到证实。大多数“抗性x抗性”杂交的分离与关于“抗性x易感”杂交的亲本的推论一致。

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