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Selection through male function favors smaller floral display size in the common morning glory Ipomoea purpurea (Convolvulaceae).

Publication ,  Journal Article
Lau, JA; Miller, RE; Rausher, MD
Published in: The American naturalist
July 2008

In self-compatible, hermaphroditic plants, display size-the number of flowers open on a plant at one time-is believed to be influenced by trade-offs between increasing geitonogamous selfing and decreasing per-flower pollen export as display size increases. Experimental results presented here indicate that selection through male function favors smaller display sizes in Ipomoea purpurea. In small arrays, plant display size was manipulated experimentally, and female selfing rate, male outcross success, and total male fitness were estimated using genetic markers and likelihood and regression analyses. As would be expected if larger displays experience greater geitonogamy, selfing rate increased with display size. However, the per-flower amount of pollen exported to other plants decreased with display size. The magnitude of this effect is more than sufficient to offset the increase in selfing rate, resulting in reduced per-flower total male fitness with increasing display size. The low values of inbreeding depression previously reported for this species would enhance this effect.

Duke Scholars

Published In

The American naturalist

DOI

EISSN

1537-5323

ISSN

0003-0147

Publication Date

July 2008

Volume

172

Issue

1

Start / End Page

63 / 74

Related Subject Headings

  • Selection, Genetic
  • Reproduction
  • Ipomoea
  • Flowers
  • Ecology
  • 31 Biological sciences
  • 06 Biological Sciences
 

Citation

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Lau, J. A., Miller, R. E., & Rausher, M. D. (2008). Selection through male function favors smaller floral display size in the common morning glory Ipomoea purpurea (Convolvulaceae). The American Naturalist, 172(1), 63–74. https://doi.org/10.1086/588080
Lau, Jennifer A., Richard E. Miller, and Mark D. Rausher. “Selection through male function favors smaller floral display size in the common morning glory Ipomoea purpurea (Convolvulaceae).The American Naturalist 172, no. 1 (July 2008): 63–74. https://doi.org/10.1086/588080.
Lau, Jennifer A., et al. “Selection through male function favors smaller floral display size in the common morning glory Ipomoea purpurea (Convolvulaceae).The American Naturalist, vol. 172, no. 1, July 2008, pp. 63–74. Epmc, doi:10.1086/588080.
Journal cover image

Published In

The American naturalist

DOI

EISSN

1537-5323

ISSN

0003-0147

Publication Date

July 2008

Volume

172

Issue

1

Start / End Page

63 / 74

Related Subject Headings

  • Selection, Genetic
  • Reproduction
  • Ipomoea
  • Flowers
  • Ecology
  • 31 Biological sciences
  • 06 Biological Sciences