Data from: Genome scans reveal candidate domestication and improvement genes in cultivated sunflower, as well as post-domestication introgression with wild relatives.

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Description:

• The development of modern crops typically involves both selection and hybridization, but to date most studies have focused on the former. In the present study we explore how both processes, and their interactions, have molded the genome of the cultivated sunflower, a globally important oilseed. • To identify genes targeted by selection during the domestication and improvement of sunflower, and to detect post-domestication hybridization with wild species, we analyzed transcriptome sequences of 80 genotypes, including wild, landrace, and modern lines of Helianthus annuus, as well as two cross-compatible wild relatives, H. argophyllus and H. petiolaris. • Outlier analyses identified 122 and 15 candidate genes associated with domestication and improvement, respectively. As in several previous studies, genes putatively involved in oil biosynthesis were the most extreme outliers. Additionally, several promising associations were observed with previously mapped QTLs, such as branching. Admixture analyses revealed that all of the modern cultivar genomes we examined contained one or more introgressions from wild populations, with every chromosome having evidence of introgression in at least one modern line. • Cumulatively, introgressions cover approximately 10% of the cultivated sunflower genome. Surprisingly, introgressions do not avoid candidate domestication genes likely because of the re-introduction of branching.

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Auteur(s) :

Baute, Gregory J.

Baute, Gregory J.

University of British Columbia

, Kane, Nolan C.

Kane, Nolan C.

University of Colorado Boulder

, Grassa, Christopher J.

Grassa, Christopher J.

University of British Columbia

, Lai, Zhao

Lai, Zhao

Indiana University Bloomington

et Rieseberg, Loren H.

Rieseberg, Loren H.

University of British Columbia

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Dépôt source:

Dryad

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URL:

https://doi.org/10.5061/dryad.k14bq

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Date de publication:

2015-12-02

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Mots-clés (en):

Helianthus annuus, Helianthus petiolaris, Breeding, Quaternary period, Sunflower, et Helianthus argophyllus

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Citation selon les normes APA:

Data from: Genome scans reveal candidate domestication and improvement genes in cultivated sunflower, as well as post-domestication introgression with wild relatives. (2015). [Data set]. Dryad. https://doi.org/10.5061/dryad.k14bq

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