Inheritance of anthracnose resistance in common bean differential cultivar AB 136
Inheritance of anthracnose resistance in common bean differential cultivar AB 136
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DOI：
10.1094/pdis.1997.81.9.996
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发表时间：
1997-09-01
期刊：
影响因子：
4.5
通讯作者：
Moreira, MA
中科院分区：
文献类型：
--
作者：
AlzateMarin, AL;Baia, GS;Moreira, MA
普通菜豆（Phaseolus vulgaris L.）在与感病鉴别品种Michelite（89号生理小种）、Mexico 222（64号生理小种）和Cornell 49-242（73号生理小种）的杂交中，研究了鉴别品种AB 136对89、64和73号生理小种（二元系统命名）的抗性。在每个杂交中，在环境控制的温室条件下，用相应的小种接种两个祖先，F-1、F-2和回交衍生的植物。结果表明，对89号和64号生理小种的抗性受单基因控制，F-2的分离比为3：1，与AB 136的回交为1：0，与Michelite（89号生理小种）和Mexico 222（64号生理小种）的回交为1：1。对于生理小种73，观察到抗性植物和感病植物之间的以下分离比：在F-2中为13：3，在与AB 136的回交中为1：0，并且在与Cornell 49-242的回交中为1：1。这些结果表明，两个独立的基因可能决定AB 136对73号小种的抗性，一个显性（Co-6）和一个隐性，建议指定为co-8。基因型Co-6_或Co-8 Co-8将产生抗性，而基因型Co-6 Co-6 Go-8_将产生易感性。鉴于AB 136系中存在的炭疽病抗性基因的显性性质及其对其他研究人员在巴西鉴定的25种Colleiotrichum lindemuthianum的抗性，我们将该品种作为供体亲本之一纳入我们的分子标记辅助回交育种计划，以开发抗炭疽病并适应巴西中部的普通菜豆品种。
Inheritance of anthracnose resistance of the common bean (Phaseolus vulgaris L.) differential cultivar AB 136 to races 89, 64, and 73 (binary system designation) was studied in crosses with the susceptible differential cultivars Michelite (race 89), Mexico 222 (race 64), and Cornell 49-242 (race 73). In each cross two progenitors, the F-1, F-2, and backcross-derived plants were inoculated with the respective race under environmentally controlled greenhouse conditions. The results indicate that single dominant gene(s) control resistance to races 89 and 64, giving a segregation ratio of 3:1 in the F-2, 1:0 in the backcrosses to AB 136, and 1:1 in the backcross to Michelite (race 89), and to Mexico 222 (race 64). For race 73, the following segregation ratios between resistant and susceptible plants were observed: 13:3 in the F-2, 1:0 in the backcross to AB 136, and 1:1 in the backcross to Cornell 49-242. Such results suggest that two independent genes may determine resistance of AB 136 to race 73, one dominant (Co-6) and one recessive that is proposed to be assigned co-8. Genotypes Co-6_ or co-8 co-8 would condition resistance, whereas susceptibility would be present in genotypes co-6 co-6 Go-8_. Given the dominant nature of anthracnose resistance genes present in line AB 136 and its resistance to 25 races of Colleiotrichum lindemuthianum identified in Brazil by other researchers, we included this cultivar as one of the donor parents in our molecular marker-assisted backcross breeding program, to develop common bean cultivars resistant to anthracnose and adapted to Central Brazil.