Exploiting natural variation in crown root traits via genome-wide association studies in maize.

ABSTRACT:

Background

Root system architecture (RSA), which is determined by the crown root angle (CRA), crown root diameter (CRD), and crown root number (CRN), is an important factor affecting the ability of plants to obtain nutrients and water from the soil. However, the genetic mechanisms regulating crown root traits in the field remain unclear.

Methods

In this study, the CRA, CRD, and CRN of 316 diverse maize inbred lines were analysed in three field trials. Substantial phenotypic variations were observed for the three crown root traits in all environments. A genome-wide association study was conducted using two single-locus methods (GLM and MLM) and three multi-locus methods (FarmCPU, FASTmrMLM, and FASTmrEMMA) with 140,421 SNP.

Results

A total of 38 QTL including 126 SNPs

SUBMITTER: Wang H 

PROVIDER: S-EPMC8299645 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature