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Differential adaptation drives ecological speciation in campions (Silene) : evidence from a multi-site transplant experiment

Favre, Adrien (författare)
Swiss Fed Inst Technol, Plant Ecol Genet, Inst Integrat Biol, Univ Str 16, CH-8092 Zurich, Switzerland.;Univ Leipzig, Inst Biol, Dept Mol Evolut & Plant Systemat & Herbarium LZ, Johannisallee 21-23, D-04103 Leipzig, Germany.
Widmer, Alex (författare)
Swiss Fed Inst Technol, Plant Ecol Genet, Inst Integrat Biol, Univ Str 16, CH-8092 Zurich, Switzerland.
Karrenberg, Sophie (författare)
Uppsala universitet,Växtekologi och evolution,Swiss Fed Inst Technol, Plant Ecol Genet, Inst Integrat Biol, Univ Str 16, CH-8092 Zurich, Switzerland.
Swiss Fed Inst Technol, Plant Ecol Genet, Inst Integrat Biol, Univ Str 16, CH-8092 Zurich, Switzerland;Univ Leipzig, Inst Biol, Dept Mol Evolut & Plant Systemat & Herbarium LZ, Johannisallee 21-23, D-04103 Leipzig, Germany. Swiss Fed Inst Technol, Plant Ecol Genet, Inst Integrat Biol, Univ Str 16, CH-8092 Zurich, Switzerland. (creator_code:org_t)
WILEY-BLACKWELL, 2017
2017
Engelska.
Ingår i: New Phytologist. - : WILEY-BLACKWELL. - 0028-646X .- 1469-8137. ; 213:3, s. 1487-1499
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • In order to investigate the role of differential adaptation for the evolution of reproductive barriers, we conducted a multi-site transplant experiment with the dioecious sister species Silenedioica and S.latifolia and their hybrids. Crosses within species as well as reciprocal first-generation (F-1) and second-generation (F-2) interspecific hybrids were transplanted into six sites, three within each species' habitat. Survival and flowering were recorded over 4yr. At all transplant sites, the local species outperformed the foreign species, reciprocal F-1 hybrids performed intermediately and F-2 hybrids underperformed in comparison to F-1 hybrids (hybrid breakdown). Females generally had slightly higher cumulative fitness than males in both within- and between-species crosses and we thus found little evidence for Haldane's rule acting on field performance. The strength of selection against F-1 and F-2 hybrids as well as hybrid breakdown increased with increasing strength of habitat adaptation (i.e. the relative fitness difference between the local and the foreign species) across sites. Our results suggest that differential habitat adaptation led to ecologically dependent post-zygotic reproductive barriers and drives divergence and speciation in this Silene system.

Ämnesord

NATURAL SCIENCES  -- Biological Sciences -- Botany (hsv//eng)
NATURVETENSKAP  -- Biologiska vetenskaper -- Botanik (hsv//swe)
NATURVETENSKAP  -- Biologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Nyckelord

dioecy
habitat adaptation
Haldane's rule
hybrid breakdown
reproductive isolation
sex ratio
Silene dioica
Silene latifolia

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Favre, Adrien
Widmer, Alex
Karrenberg, Soph ...
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