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Inheritance of Crown Rust Resistance in a Perennial Ryegrass Genotype of the Cultivar Arvella

机译:植物植物植物植物抗胎体抗性的遗传

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Crown rust, caused by Puccinia coronata f. sp. lolii is a common disease of perennial ryegrass (Lolium perenne) in Europe. To study the inheritance of resistance to crown rust, a resistant genotype of the diploid cultivar Arvella was crossed with a susceptible genotype of the cultivar Aurora to generate a Fi population. Out of this population, two parents were selected on the basis of crown rust reaction and backcrossed with a susceptible Aurora genotype to generate two sets of F2 populations. All parents, the Fi and the two F2 populations were screened for their response to three single-pustule isolates (SPI) of crown rust in a detached-leaf segment test under growth chamber conditions. Genetic analysis of resistance led to the identification of two dominant resistance genes. The first gene, LpPc4, conferred resistance to SPI A and K, but not to SPI F. The second gene, LpPc5, proved to be effective against SPI F and K, but not against SPI A.
机译:冠锈,由Puccinia coronata f引起。 SP。 萝莉是欧洲常年黑麦草(Lolium Perenne)的常见疾病。 为研究抗冠锈的耐药性的遗传,二倍体品种Arvella的抗性基因型与品种极光的敏感基因型交叉,以产生填充群体。 在这一人口中,在冠锈反应的基础上选择了两个父母,并用易感极光基因型进行了交流,以产生两组F2种群。 筛选所有父母,FI和两个F2群体的响应于生长室条件下的分离叶片段试验中的三个单猪锈病(SPI)的响应。 抗性的遗传分析导致了两个显性抗性基因的鉴定。 第一个基因,LPPC4,赋予SPI A和K的抗性,但不是SPI F.第二基因,LPPC5证明是对SPI F和K有效,但不是对SPI A.

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