Genome-wide association analysis of bean fly resistance and agro-morphological traits in common bean

The bean fly (Ophiomyia spp) is a key insect pest causing significant crop damage and yield loss in common bean (Phaseolus vulgaris L., 2n = 2x = 22). Development and deployment of agronomic superior and bean fly resistant common bean varieties aredependent on genetic variation and the identificatio...

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Bibliographic Details
Published in:PloS one 2021-04, Vol.16 (4), p.e0250729
Main Authors: Nkhata, Wilson, Shimelis, Hussein, Melis, Rob, Chirwa, Rowland, Mzengeza, Tenyson, Mathew, Isack, Shayanowako, Admire
Format: Article
Language:English
Subjects:
Analysis
Animals
Biology and Life Sciences
Common beans
Diptera
Diptera - genetics
Disease Resistance - genetics
Genetic aspects
Genome-Wide Association Study
Genotype
Phaseolus - genetics
Phaseolus - parasitology
Phenotype
Plant Diseases - genetics
Plant Diseases - parasitology
Polymorphism, Single Nucleotide
Single nucleotide polymorphisms
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Summary:The bean fly (Ophiomyia spp) is a key insect pest causing significant crop damage and yield loss in common bean (Phaseolus vulgaris L., 2n = 2x = 22). Development and deployment of agronomic superior and bean fly resistant common bean varieties aredependent on genetic variation and the identification of genes and genomic regions controlling economic traits. This study's objective was to determine the population structure of a diverse panel of common bean genotypes and deduce associations between bean fly resistance and agronomic traits based on single nucleotide polymorphism (SNP) markers. Ninety-nine common bean genotypes were phenotyped in two seasons at two locations and genotyped with 16 565 SNP markers. The genotypes exhibited significant variation for bean fly damage severity (BDS), plant mortality rate (PMR), and pupa count (PC). Likewise, the genotypes showed significant variation for agro-morphological traits such as days to flowering (DTF), days to maturity (DTM), number of pods per plant (NPP), number of seeds per pod (NSP), and grain yield (GYD). The genotypes were delineated into two populations, which were based on the Andean and Mesoamerican gene pools. The genotypes exhibited a minimum membership coefficient of 0.60 to their respective populations. Eighty-three significant (P
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0250729