Total FLC transcript dynamics from divergent paralogue expression explains flowering diversity in Brassica napus.
Brassica napus
flowering locus C
gene dosage balance
modelling
phenotypic plasticity
polyploidy
transcriptomics
vernalization
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
03 2021
03 2021
Historique:
received:
03
10
2020
accepted:
19
11
2020
pubmed:
9
12
2020
medline:
15
5
2021
entrez:
8
12
2020
Statut:
ppublish
Résumé
Flowering time is a key adaptive and agronomic trait. In Arabidopsis, natural variation in expression levels of the floral repressor FLOWERING LOCUS C (FLC) leads to differences in vernalization. In Brassica napus there are nine copies of FLC. Here, we study how these multiple FLC paralogues determine vernalization requirement as a system. We collected transcriptome time series for Brassica napus spring, winter, semi-winter, and Siberian kale crop types. Modelling was used to link FLC expression dynamics to floral response following vernalization. We show that relaxed selection pressure has allowed expression of FLC paralogues to diverge, resulting in variation of FLC expression during cold treatment between paralogues and accessions. We find that total FLC expression dynamics best explains differences in cold requirement between cultivars, rather than expression of specific FLC paralogues. The combination of multiple FLC paralogues with different expression dynamics leads to rich behaviour in response to cold and a wide range of vernalization requirements in B. napus. We find evidence for different strategies to determine the response to cold in existing winter rapeseed accessions.
Identifiants
pubmed: 33289112
doi: 10.1111/nph.17131
pmc: PMC7986421
doi:
Substances chimiques
Arabidopsis Proteins
0
MADS Domain Proteins
0
Banques de données
RefSeq
['PRJNA648031']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
3534-3548Subventions
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/J004464/1
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BBS/E/J/000PR9788
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BBS/E/J/00000611
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BBS/E/J/000PR9773
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/P003095/1
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/P013511/1
Pays : United Kingdom
Informations de copyright
© 2020 The Authors New Phytologist © 2020 New Phytologist Foundation.
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