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Genetics of stripe rust resistance in a common wheat landrace Aus27492 and its transfer to modern wheat cultivars
Canadian Journal of Plant Pathology ( IF 2 ) Pub Date : 2021-10-04 , DOI: 10.1080/07060661.2021.1979657
Mesfin Gessese 1 , Hanif Miah 1 , Urmil Bansal 1 , Harbans Bariana 1
Affiliation  

Abstract

The development of resistant cultivars is a preferred way to manage the wheat rust pathogens. Successful breeding relies on the continuous discovery, characterization and deployment of genetically diverse resistance sources. This investigation covers the identification and characterization of the stripe rust (caused by Puccinia striiformis f. sp. tritici) resistance carried by a pre-Green Revolution wheat genotype, Aus27492, from France and its transfer to modern backgrounds. Genetic analysis of stripe rust resistance using an F3 population derived from the cross of Aus27492 with the susceptible parent ‘Avocet S’ indicated digenic inheritance of all stage resistance. The underlying genes were tentatively named YrAW6 and YrAW7 and these loci were located in the long arms of chromosomes 2B and 5A, respectively, through the Illumina iSelect 90 K Infinium SNP genotyping array-based bulked segregant analysis (BSA). While YrAW7 was shown to be the same as the previously described stripe rust resistance gene Yr34 based on pathotypic specificity, YrAW6 appears to represent a new locus. To take these results from the laboratory to farmers’ fields, derivatives of Aus27492 in the Australian wheat cultivars ‘Emu Rock’, ‘Mace’ and ‘Suntop’ were delivered to Australian wheat-breeding companies for use as donor sources.



中文翻译:

普通小麦地方品种 Aus27492 抗条锈病的遗传学及其向现代小麦品种的转移

摘要

培育抗病品种是控制小麦锈病病原体的首选方法。成功的育种依赖于对遗传多样性抗性源的不断发现、表征和部署。本次调查涵盖了条锈病的鉴定和表征(由条锈菌楼属小麦)由预绿色革命小麦基因型,Aus27492,来自法国并将其传递给现代背景下的阻力。使用源自 Aus27492 与易感亲本“Avocet S”杂交的 F 3种群对条锈病抗性进行遗传分析表明所有阶段抗性的双基因遗传。潜在的基因被暂时命名为YrAW6通过基于 Illumina iSelect 90  K Infinium SNP 基因分型阵列的批量分离分析 (BSA),YrAW7和这些基因座分别位于染色体 2B 和 5A 的长臂中。虽然YrAW7被证明与之前描述的基于病理特异性的条锈病抗性基因Yr34相同,但YrAW6似乎代表了一个新的基因座。为了将这些结果从实验室带到农民的田地,澳大利亚小麦品种“Emu Rock”、“Mace”和“Suntop”中的 Aus27492 衍生物被交付给澳大利亚小麦育种公司用作供体来源。

更新日期:2021-12-09
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