Expression complementation of gene presence/absence polymorphisms in hybrids contributes importantly to heterosis in sunflower.

ABSTRACT:

Introduction

Numerous crops have transitioned to hybrid seed production to increase yields and yield stability through heterosis. However, the molecular mechanisms underlying heterosis and its stability across environments are not yet fully understood.

Objectives

This study aimed to (1) elucidate the genetic and molecular mechanisms underlying heterosis in sunflower, and (2) determine how heterosis is maintained under different environments.

Methods

Genome-wide association (GWA) analyses were employed to assess the effects of presence/absence variants (PAVs) and stop codons on 16 traits phenotyped in the sunflower association mapping population at three locations. To link the GWA results to transcriptomic variation, we sequenced the transcriptomes of two sunflower cul

SUBMITTER: Lee JS 

PROVIDER: S-EPMC9788961 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature