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Morph-specific selection on floral traits in a polymorphic plant

Vanhoenacker, Didrik (author)
Stockholms universitet,Botaniska institutionen
Toräng, Per (author)
Uppsala universitet,Växtekologi och evolution
Ågren, Jon (author)
Uppsala universitet,Växtekologi och evolution
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Ehrlen, Johan (author)
Stockholms universitet,Botaniska institutionen
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 (creator_code:org_t)
2010-05-13
2010
English.
In: Journal of Evolutionary Biology. - : Wiley. - 1010-061X .- 1420-9101. ; 23:6, s. 1251-1260
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Correlations between phenotypic traits are common in many organisms, but the relative importance of nonadaptive mechanisms and selection for the evolution and maintenance of such correlations are poorly understood. In polymorphic species, morphs may evolve quantitative differences in additional characters as a result of morph-specific selection. The perennial rosette herb Primula farinosa is polymorphic for scape length. The short-scaped morph is less damaged by grazers and seed predators but is more strongly pollen limited than the long-scaped morph. We examined whether morph-specific differences in biotic interactions are associated with differences in selection on two other traits affecting floral display (number of flowers and petal size) and on one trait likely to affect pollination efficiency (corolla tube width) in three P. farinosa populations. Differences in selection between morphs were detected in one population. In this population, selection for more flowers and larger petals was stronger in the short-scaped than in the long-scaped morph, and although there was selection for narrower corolla tubes in the short-scaped morph, no statistically significant selection on corolla tube width could be detected in the long-scaped morph. In the study populations, the short-scaped morph produced more and larger flowers and wider corolla tubes. Current morph-specific selection was thus only partly consistent with trait differences between morphs. The results provide evidence of morph-specific selection on traits associated with floral display and pollination efficiency, respectively.

Subject headings

NATURVETENSKAP  -- Biologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Keyword

correlational selection
floral display
flower morphology
phenotypic selection
pollination
Primula farinosa
seed predation
Biology
Biologi

Publication and Content Type

ref (subject category)
art (subject category)

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Vanhoenacker, Di ...
Toräng, Per
Ågren, Jon
Ehrlen, Johan
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NATURAL SCIENCES
NATURAL SCIENCES
and Biological Scien ...
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Journal of Evolu ...
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Stockholm University
Uppsala University

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