Discovery and validation of genomic regions associated with resistance to maize lethal necrosis in four biparental populations.

ABSTRACT: In sub-Saharan Africa, maize is the key determinant of food security for smallholder farmers. The sudden outbreak of maize lethal necrosis (MLN) disease is seriously threatening the maize production in the region. Understanding the genetic basis of MLN resistance is crucial. In this study, we used four biparental populations applied linkage mapping and joint linkage mapping approaches to identify and validate the MLN resistance-associated genomic regions. All populations were genotyped with low to high density markers and phenotyped in multiple environments against MLN under artificial inoculation. Phenotypic variation for MLN resistance was significant and heritability was moderate to high in all four populations for both early and late stages of disease infection. Linkage mapping reveale

SUBMITTER: Gowda M 

PROVIDER: S-EPMC5945787 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature