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Multiple aspects of the selfing syndrome of the morning glory Ipomoea lacunosa evolved in response to selection: A Qst-Fst comparison.

Publication ,  Journal Article
Rifkin, JL; Liao, IT; Castillo, AS; Rausher, MD
Published in: Ecology and evolution
July 2019

The frequent transition from outcrossing to selfing in flowering plants is often accompanied by changes in multiple aspects of floral morphology, termed the "selfing syndrome." While the repeated evolution of these changes suggests a role for natural selection, genetic drift may also be responsible. To determine whether selection or drift shaped different aspects of the pollination syndrome and mating system in the highly selfing morning glory Ipomoea lacunosa, we performed multivariate and univariate Qst-Fst comparisons using a wide sample of populations of I. lacunosa and its mixed-mating sister species Ipomoea cordatotriloba. The two species differ in early growth, floral display, inflorescence traits, corolla size, nectar, and pollen number. Our analyses support a role for natural selection driving trait divergence, specifically in corolla size and nectar traits, but not in early growth, display size, inflorescence length, or pollen traits. We also find evidence of selection for reduced herkogamy in I. lacunosa, consistent with selection driving both the transition in mating system and the correlated floral changes. Our research demonstrates that while some aspects of the selfing syndrome evolved in response to selection, others likely evolved due to drift or correlated selection, and the balance between these forces may vary across selfing species.

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Published In

Ecology and evolution

DOI

EISSN

2045-7758

ISSN

2045-7758

Publication Date

July 2019

Volume

9

Issue

13

Start / End Page

7712 / 7725

Related Subject Headings

  • 4102 Ecological applications
  • 3104 Evolutionary biology
  • 3103 Ecology
  • 0603 Evolutionary Biology
  • 0602 Ecology
 

Citation

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Rifkin, J. L., Liao, I. T., Castillo, A. S., & Rausher, M. D. (2019). Multiple aspects of the selfing syndrome of the morning glory Ipomoea lacunosa evolved in response to selection: A Qst-Fst comparison. Ecology and Evolution, 9(13), 7712–7725. https://doi.org/10.1002/ece3.5329
Rifkin, Joanna L., Irene T. Liao, Allan S. Castillo, and Mark D. Rausher. “Multiple aspects of the selfing syndrome of the morning glory Ipomoea lacunosa evolved in response to selection: A Qst-Fst comparison.Ecology and Evolution 9, no. 13 (July 2019): 7712–25. https://doi.org/10.1002/ece3.5329.
Rifkin JL, Liao IT, Castillo AS, Rausher MD. Multiple aspects of the selfing syndrome of the morning glory Ipomoea lacunosa evolved in response to selection: A Qst-Fst comparison. Ecology and evolution. 2019 Jul;9(13):7712–25.
Rifkin, Joanna L., et al. “Multiple aspects of the selfing syndrome of the morning glory Ipomoea lacunosa evolved in response to selection: A Qst-Fst comparison.Ecology and Evolution, vol. 9, no. 13, July 2019, pp. 7712–25. Epmc, doi:10.1002/ece3.5329.
Rifkin JL, Liao IT, Castillo AS, Rausher MD. Multiple aspects of the selfing syndrome of the morning glory Ipomoea lacunosa evolved in response to selection: A Qst-Fst comparison. Ecology and evolution. 2019 Jul;9(13):7712–7725.
Journal cover image

Published In

Ecology and evolution

DOI

EISSN

2045-7758

ISSN

2045-7758

Publication Date

July 2019

Volume

9

Issue

13

Start / End Page

7712 / 7725

Related Subject Headings

  • 4102 Ecological applications
  • 3104 Evolutionary biology
  • 3103 Ecology
  • 0603 Evolutionary Biology
  • 0602 Ecology