Genetic basis of heterosis for yield and yield components explored by QTL mapping across four genetic populations in upland cotton.

ABSTRACT:

Background

Quantitative trait loci (QTL) mapping provides a powerful tool to unravel the genetic bases of cotton yield and its components, as well as their heterosis. In the present study, the genetic basis underlying inbreeding depression and heterosis for yield and yield components of upland cotton was investigated in recombinant inbred line (RIL), immortalized F₂ (IF₂), and two backcross (BCF₁) populations based on a high-density SNP linkage map across four environments.

Results

Significant inbreeding depression of fruit branches per plant (FB), boll numbers per plant (BN), seed cotton yield (SY), and lint yield (LY) in RIL population and high levels of heterosis for SY, LY, and boll weight (BW) in IF₂ and two BCF₁ po

SUBMITTER: Li C 

PROVIDER: S-EPMC6292039 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature