Anthracnose is a severe disease of common bean that, under favorable conditions, can cause a 100% yield loss. For effective resistance breeding, the virulence and genetic variability of the causal pathogen, Colletotrichum lindemuthianum, must be understood and the emergence of new races monitored to ensure the development of broad-spectrum, durable resistance. In the present study, 28 isolates of C. lindemuthianum collected in Pernambuco, Brazil, were characterized: i) for their pathogenicity on a differential common bean cultivar set, ii) for their genetic variability, based on the Internally Transcribed Spacer (ITS) region sequences, and iii) for their ability to cause anthracnose on a selection of 20 common bean accessions. The 12 differential cultivars were inoculated with the 28 isolates, identifying 16 races of C. lindemuthianum: 2, 3, 8, 9, 10, 64, 65, 72, 73, 75, 81, 85, 89, 117, 139, and 331. Except for race 81, all were reported for the first time in Pernambuco; this was the first report of race 139 in Brazil and of race 331 in the world. The ITS region sequence of 17 isolates revealed the presence of 27 SNPs, four SNPs in the ITS 1 region, and 23 SNPs in the ITS 2 region. Of the 20 common bean accessions screened for resistance with the 16 isolates of C. lindemuthianum, the Andean accessions ‘Praia’ and ‘Africano 4’ were the most resistant. The broad resistance detected in some common bean accessions indicates their utility as potential sources of resistance to C. lindemuthianum, particularly in areas where Mesoamerican beans and Mesoamerican races of the pathogen are predominant.

炭疽病是一种常见的豆类严重病，在有利条件下，可导致100％的产量损失。为了进行有效的抗性育种，必须了解病原体病原菌（Colletotrichum lindemuthianum）的毒力和遗传变异性，并监测新种族的出现，以确保产生广谱，持久的抗性。在本研究中，林氏梭状芽胞杆菌的28种分离株从巴西伯南布哥州收集的细菌具有以下特征：i）在不同的普通豆栽培品种上的致病性； ii）基于内部转录间隔区（ITS）区域序列的遗传变异性； iii）引起炭疽病的能力选择20种常见的豆种。用28个分离株接种了12个差异品种，确定了16个小种的C.lindemuthianum：2、3、8、9、10、64、65、72、73、75、81、85、89、117、139和139。 331 。除第81场比赛外，所有报道均在伯南布哥州首次报道。这是巴西第139场比赛和世界331场比赛的首次报道。17个分离株的ITS区域序列显示在ITS 1区域存在27个SNP，在ITS 2区域存在4个SNP，而在ITS 2区域存在23个SNP。在用16个分离的C. lindemuthianum进行抗性筛选的20种常见豆种中，安第斯种“ Praia”和“ Africano 4”种的抗性最高。在一些常见的豆种中检测到的广泛耐药性表明，它们可作为对菩提树抗药性的潜在来源，特别是在中美洲豆类和病原体中美洲种系占主导地位的地区。