Format

Send to

Choose Destination
Nature. 2017 Jun 1;546(7656):148-152. doi: 10.1038/nature22380. Epub 2017 May 22.

The sunflower genome provides insights into oil metabolism, flowering and Asterid evolution.

Author information

1
LIPM, Université de Toulouse, INRA, CNRS, Castanet-Tolosan, France.
2
Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.
3
INRA/UBP UMR 1095 GDEC (Genetics, Diversity and Ecophysiology of Cereals), Clermont Ferrand 63100, France.
4
Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, University of Paris-Saclay, 91405 Orsay, France.
5
Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, University of Paris-Diderot, Sorbonne Paris-Cité, 91405 Orsay, France.
6
Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado 80309-0334, USA.
7
Department of Plant Biology, Miller Plant Sciences, University of Georgia, Athens, Georgia 30602, USA.
8
Department of Biotechnology, Tel-Hai Academic College, Upper Galilee 12210, Israel.
9
MIGAL - Galilee Research Institute, PO box 831, Kiryat Shmona 11016, Israel.
10
INRA, Centre National de Ressources Génomiques Végétales, F-31326 Castanet-Tolosan, France.
11
INRA, US 1279 EPGV/CEA/CNG, Evry, France.
12
Dow AgroSciences LLC, Indianapolis, Indiana 46268, USA.
13
Biogemma, 31700 Mondonville, France.
14
INRA, GeT-PlaGe, Genotoul, Castanet-Tolosan, France.
15
INRA, UMR1388 Génétique, Physiologie et Systèmes d'Elevage, F-31326 Castanet-Tolosan, France.
16
DuPont Pioneer, Johnston, Iowa 50131, USA.
17
Department of Plant Sciences, University of California, Davis, California 95616, USA.
18
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA.
19
Center for Genomics and Bioinformatics, Indiana University, Bloomington, Indiana 47405, USA.
20
Department of Biological Sciences, University of Memphis, Memphis, Tennessee 38152, USA.
21
TERRES INOVIA, UMR Arche INRA/ENSAT F-31320 Castanet-Tolosan, France.
22
Department of Horticulture, University of Georgia, Athens, Georgia 30602, USA.
23
Wellcome Trust Sanger Institute, Hinxton CB10 1SA, UK.
24
MIAT, Université de Toulouse, INRA, Castanet-Tolosan, France.

Abstract

The domesticated sunflower, Helianthus annuus L., is a global oil crop that has promise for climate change adaptation, because it can maintain stable yields across a wide variety of environmental conditions, including drought. Even greater resilience is achievable through the mining of resistance alleles from compatible wild sunflower relatives, including numerous extremophile species. Here we report a high-quality reference for the sunflower genome (3.6 gigabases), together with extensive transcriptomic data from vegetative and floral organs. The genome mostly consists of highly similar, related sequences and required single-molecule real-time sequencing technologies for successful assembly. Genome analyses enabled the reconstruction of the evolutionary history of the Asterids, further establishing the existence of a whole-genome triplication at the base of the Asterids II clade and a sunflower-specific whole-genome duplication around 29 million years ago. An integrative approach combining quantitative genetics, expression and diversity data permitted development of comprehensive gene networks for two major breeding traits, flowering time and oil metabolism, and revealed new candidate genes in these networks. We found that the genomic architecture of flowering time has been shaped by the most recent whole-genome duplication, which suggests that ancient paralogues can remain in the same regulatory networks for dozens of millions of years. This genome represents a cornerstone for future research programs aiming to exploit genetic diversity to improve biotic and abiotic stress resistance and oil production, while also considering agricultural constraints and human nutritional needs.

PMID:
28538728
DOI:
10.1038/nature22380
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Nature Publishing Group
Loading ...
Support Center