不同位点控制菜豆炭疽菌同一菌系不同分离物的抗性。
Different loci control resistance to different isolates of the same race of Colletotrichum lindemuthianum in common bean.
机构信息
Department of Biology, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil.
Department of Genetics, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, São Paulo, Brazil.
出版信息
Theor Appl Genet. 2021 Feb;134(2):543-556. doi: 10.1007/s00122-020-03713-x. Epub 2020 Nov 1.
Linkage and genome-wide association analyses using high-throughput SNP genotyping revealed different loci controlling resistance to different isolates of race 65 of Colletotrichum lindemuthianum in common bean. Development of varieties with durable resistance to anthracnose is a major challenge in common bean breeding programs because of the extensive virulence diversity of Colletotrichum lindemuthianum fungus. We used linkage and genome-wide association analyses to tap the genomic regions associated with resistance to different isolates of race 65. Linkage mapping was done using an F population derived from the cross between the Mesoamerican common beans BRS Estilo x Ouro Vermelho, inoculated with two different isolates of race 65. Association genetics relied on a diversity common bean panel containing 189 common bean accessions inoculated with five different isolates of race 65 as an attempt to validate the linkage analysis findings and, eventually, identify other genomic regions associated with resistance to race 65. The F population and diversity panel were genotyped with the BARCBean6K_3 Illumina BeadChip containing 5398 SNP markers. Both linkage and genome-wide association analyses identified different loci controlling resistance to different isolates of race 65 on linkage group Pv04. Genome-wide association analysis also detected loci on Pv05, Pv10 and Pv11 associated with resistance to race 65. These findings indicate that resistance to race 65 can be overcome by the virulence diversity among different isolates of the same race and could lead to the loss of resistance after cultivar release. We identified 25 resistant common bean cultivars to all five isolates of race 65 in the diversity panel. The accessions should be useful to develop cultivars combining different resistance genes that favor durable resistance to anthracnose in common bean.
利用高通量 SNP 基因分型进行连锁和全基因组关联分析,揭示了控制不同 65 号菌系炭疽病抗性的不同基因座。由于炭疽菌的广泛毒力多样性,开发对炭疽病具有持久抗性的品种是普通豆育种计划的主要挑战。我们使用连锁和全基因组关联分析来挖掘与不同 65 号菌系抗性相关的基因组区域。连锁图谱是通过 Mesoamerican 普通豆 BRS Estilo 和 Ouro Vermelho 杂交后代的 F 群体进行的,该群体用两种不同的 65 号菌系接种。关联遗传学依赖于一个包含 189 个普通豆品种的多样性普通豆面板,这些品种用 5 种不同的 65 号菌系接种,试图验证连锁分析结果,并最终识别与 65 号菌系抗性相关的其他基因组区域。F 群体和多样性面板用包含 5398 个 SNP 标记的 BARCBean6K_3 Illumina BeadChip 进行了基因分型。连锁和全基因组关联分析都在 Pv04 连锁群上鉴定出控制不同 65 号菌系抗性的不同基因座。全基因组关联分析还检测到 Pv05、Pv10 和 Pv11 连锁群上与 65 号菌系抗性相关的基因座。这些发现表明,同一菌系不同菌系的毒力多样性可以克服对 65 号菌系的抗性,并且可能导致品种释放后抗性丧失。我们在多样性面板中鉴定出 25 种对所有 5 种 65 号菌系都具有抗性的普通豆品种。这些品系应该有助于开发结合不同抗性基因的品种,以促进普通豆对炭疽病的持久抗性。