Strong temporal dynamics of QTL action on plant growth progression revealed through high-throughput phenotyping in canola.
Brassica
biomass
genome-wide association studies
growth dynamics
high-throughput phenotyping
vegetative development
Journal
Plant biotechnology journal
ISSN: 1467-7652
Titre abrégé: Plant Biotechnol J
Pays: England
ID NLM: 101201889
Informations de publication
Date de publication:
01 2020
01 2020
Historique:
received:
21
11
2018
revised:
13
05
2019
accepted:
15
05
2019
pubmed:
28
5
2019
medline:
23
6
2020
entrez:
25
5
2019
Statut:
ppublish
Résumé
A major challenge of plant biology is to unravel the genetic basis of complex traits. We took advantage of recent technical advances in high-throughput phenotyping in conjunction with genome-wide association studies to elucidate genotype-phenotype relationships at high temporal resolution. A diverse Brassica napus population from a commercial breeding programme was analysed by automated non-invasive phenotyping. Time-resolved data for early growth-related traits, including estimated biovolume, projected leaf area, early plant height and colour uniformity, were established and complemented by fresh and dry weight biomass. Genome-wide SNP array data provided the framework for genome-wide association analyses. Using time point data and relative growth rates, multiple robust main effect marker-trait associations for biomass and related traits were detected. Candidate genes involved in meristem development, cell wall modification and transcriptional regulation were detected. Our results demonstrate that early plant growth is a highly complex trait governed by several medium and many small effect loci, most of which act only during short phases. These observations highlight the importance of taking the temporal patterns of QTL/allele actions into account and emphasize the need for detailed time-resolved analyses to effectively unravel the complex and stage-specific contributions of genes affecting growth processes that operate at different developmental phases.
Identifiants
pubmed: 31125482
doi: 10.1111/pbi.13171
pmc: PMC6920335
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
68-82Informations de copyright
© 2019 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd.
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