Genetic diversity ofPseudocercospora griseolaresistancelociin common beans

Author(s):Show less -

de Almeida, Caleo Panhoca ; Arruda, Natalia ; de Carvalho Paulino, Jean Fausto ; de Freitas, Gabriel Mamedio ; Janini Bonfante, Gabriel Francesco ; Bajay, Miklos Maximiliano ; de Deus, Bianca Cristina ; Alves Patricio, Flavia Rodrigues ; Morais Carbonell, Sergio Augusto ; Chiorato, Alisson Fernando ; Benchimol-Reis, Luciana Lasry

• Document type: Journal article
• Source: ROPICAL PLANT PATHOLOG; v. 46, n. 1, p. 10-pg., 2020-09-03.

Abstract

Common bean (Phaseolus vulgarisL.) is one of the most widely grown legumes in the world. Although the crop has high yield potential, average yields in Brazil are low due to several diseases. Angular leaf spot (ALS), caused byPseudocercospora griseola, is among the most important diseases. A set of 81 accessions from the Instituto Agronomico (IAC, Campinas, SP) germplasm bank were evaluated for ALS resistance and genotyped by 12 microsatellites previously associated with ALS QTL resistance. Allele frequencies, number of alleles perlocus, expected heterozygosity (He), and Shannon's Information Index (I) were calculated. The average Ho was 0.12, and the He was 0.54. The STRUCTURE analysis and UPGMA clustering based on Nei's genetic distance indicated a moderate degree of genetic diversity, with 4 and 5 main groups, respectively. Evaluation of the severity of ALS showed that 17% of the accessions had resistance. Cultivars were recommended for breeding crosses aimed at gaining in genetic diversity and resistance to ALS. (AU)

• FAPESP's process: 14/19967-1 - Identification of common bean genotypes resistant to angular leaf spot by assessing the incompatibility reactions and molecular markers
• Grantee: Natalia Arruda
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 14/11145-2 - Molecular marker assisted selection using the AB-QTL method and genotyping by sequencing (GBS) toward angular leaf spot and antracnose resistance in common beans
• Grantee: Luciana Lasry Benchimol-Reis
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/01753-3 - Marker assisted selection and genotyping by sequenecing (GBS) toward angular leaf resistance in common beans
• Grantee: Caléo Panhoca de Almeida
• Support Opportunities: Scholarships in Brazil - Master