Genome-wide association and high-resolution phenotyping link Oryza sativa panicle traits to numerous trait-specific QTL clusters. Academic Article uri icon

Overview

MeSH

  • Chromosome Mapping
  • Genome-Wide Association Study
  • Phenotype

MeSH Major

  • Genome, Plant
  • Inflorescence
  • Oryza
  • Quantitative Trait Loci

abstract

  • Rice panicle architecture is a key target of selection when breeding for yield and grain quality. However, panicle phenotypes are difficult to measure and susceptible to confounding during genetic mapping due to correlation with flowering and subpopulation structure. Here we quantify 49 panicle phenotypes in 242 tropical rice accessions with the imaging platform PANorama. Using flowering as a covariate, we conduct a genome-wide association study (GWAS), detect numerous subpopulation-specific associations, and dissect multi-trait peaks using panicle phenotype covariates. Ten candidate genes in pathways known to regulate plant architecture fall under GWAS peaks, half of which overlap with quantitative trait loci identified in an experimental population. This is the first study to assess inflorescence phenotypes of field-grown material using a high-resolution phenotyping platform. Herein, we establish a panicle morphocline for domesticated rice, propose a genetic model underlying complex panicle traits, and demonstrate subtle links between panicle size and yield performance.

publication date

  • February 4, 2016

has subject area

  • Chromosome Mapping
  • Genome, Plant
  • Genome-Wide Association Study
  • Inflorescence
  • Oryza
  • Phenotype
  • Quantitative Trait Loci

Research

keywords

  • Journal Article

Identity

Language

  • eng

PubMed Central ID

  • PMC4742901

Digital Object Identifier (DOI)

  • 10.1038/ncomms10527

PubMed ID

  • 26841834

Additional Document Info

start page

  • 10527

volume

  • 7