Homoeologous duplicated regions are involved in quantitative resistance of Brassica napus to stem canker.

ABSTRACT:

Background

Several major crop species are current or ancient polyploids. To better describe the genetic factors controlling traits of agronomic interest (QTL), it is necessary to understand the structural and functional organisation of these QTL regions in relation to genome duplication. We investigated quantitative resistance to the fungal disease stem canker in Brassica napus, a highly duplicated amphidiploid species, to assess the proportion of resistance QTL located at duplicated positions.

Results

Genome-wide association analysis on a panel of 116 oilseed rape varieties genotyped with 3228 SNP indicated that 321 markers, corresponding to 64 genomic regions, are associated with resistance to stem canker. These genomic regions are relatively equally distributed on the A (

SUBMITTER: Fopa Fomeju B 

PROVIDER: S-EPMC4082613 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature