Signatures of natural selection in abiotic stress-responsive genes of Solanum chilense.
R Soc Open Sci
; 5(1): 171198, 2018 Jan.
Article
em En
| MEDLINE
| ID: mdl-29410831
Environmental conditions are strong selective forces, which may influence adaptation and speciation. The wild tomato species Solanum chilense, native to South America, is exposed to a range of abiotic stress factors. To identify signatures of natural selection and local adaptation, we analysed 16 genes involved in the abiotic stress response and compared the results to a set of reference genes in 23 populations across the entire species range. The abiotic stress-responsive genes are characterized by elevated nonsynonymous nucleotide diversity and divergence. We detected signatures of positive selection in several abiotic stress-responsive genes on both the population and species levels. Local adaptation to abiotic stresses is particularly apparent at the boundary of the species distribution in populations from coastal low-altitude and mountainous high-altitude regions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
País/Região como assunto:
America do sul
/
Chile
Idioma:
En
Revista:
R Soc Open Sci
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Alemanha
País de publicação:
Reino Unido