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首页> 外文期刊>Australian Journal of Crop Science >Genetic mapping of the resistance allele Co-5 2 to Colletotrichum lindemuthianum in the common bean MSU 7-1 line
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Genetic mapping of the resistance allele Co-5 2 to Colletotrichum lindemuthianum in the common bean MSU 7-1 line

机译：普通豆MSU 7-1品系中抗性等位基因Co-5 2对炭疽菌的遗传定位

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摘要

Anthracnose is a devastating fungal disease of common bean (Phaseolus vulgaris L.), the causal agent of which is Colletotrichum lindemuthianum. MSU 7-1 is a common bean breeding line that contains the Co-52 and Co-7 anthracnose resistance genes. In this study, phenotypic analyses were conducted in an F2 population derived from the Mexico 222 (S) × MSU 7-1 (R) cross that was inoculated with race 64 of C. lindemuthianum. Segregation analysis revealed a 3R:1S ratio, indicating that only Co-52 confers resistance to race 64 once the Co-7 gene has been defeated by this race. The molecular marker g12333250, in linkage group Pv07, was linked in coupling phase to Co-52 at a distance of 1.2 cM. The presence or absence of this marker was also determined in the G 2333, TU, H1 and PI 207262 cultivars. It was found that the g12333250 molecular marker was present in G 2333 and absent in the other cultivars. Because the allele and marker are physically linked in a cis configuration, the Co-52 resistance allele present in MSU 7-1 and G 2333 cultivars can be monitored with great efficiency using g12333250. These results will be very useful for breeding programs aimed at developing anthracnose-resistant bean cultivars via marker-assisted selection.
机译：炭疽病是一种毁灭性的普通豆类真菌病（菜豆），其病原体是炭疽菌（Colletotrichum lindemuthianum）。 MSU 7-1是一种常见的大豆育种系，其中包含Co-52和Co-7炭疽病抗性基因。在这项研究中，对来自墨西哥222（S）×MSU 7-1（R）杂交的F2种群进行了表型分析，该种群接种了C. lindemuthianum的种族64。分离分析显示3R：1S比率，表明一旦Co-7基因被该种族击败，只有Co-52赋予对种族64的抗性。在连接基团Pv07中的分子标记g12333250在偶联阶段以1.2 cM的距离与Co-52连接。在G 2333，TU，H1和PI 207262品种中​​也确定了此标记的存在与否。发现g12333250分子标记存在于G 2333中，而在其他品种中不存在。由于等位基因和标记物以顺式构型物理连接，因此使用g12333250可以高效监控MSU 7-1和G 2333品种中存在的Co-52抗性等位基因。这些结果对于旨在通过标记辅助选择开发耐炭疽病的大豆品种的育种计划非常有用。

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