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Pollinator and nonpollinator selection on ray morphology in Leucanthemum vulgare (oxeye daisy, Asteraceae)

Andersson, Stefan LU (2008) In American Journal of Botany 95(9). p.1072-1078
Abstract
Despite evidence that both pollinators and nonpollinator agents of selection can shape the evolution of floral characters, there have been few attempts to compare the strengths and directions of selection from pollinators and other agents in the same study system. In this investigation of Leucanthemum vulgare, a self-incompatible composite known for its conspicuous white rays, I obtained data from a ray removal experiment in the field and from a segregating F2 population in an experimental garden to assess the role of pollinator and nonpollinator selection as stabilizing factors on floral evolution in this species. Removal of all rays reduced the pollination success of heads by 31–35%, but did not significantly affect the level of... (More)
Despite evidence that both pollinators and nonpollinator agents of selection can shape the evolution of floral characters, there have been few attempts to compare the strengths and directions of selection from pollinators and other agents in the same study system. In this investigation of Leucanthemum vulgare, a self-incompatible composite known for its conspicuous white rays, I obtained data from a ray removal experiment in the field and from a segregating F2 population in an experimental garden to assess the role of pollinator and nonpollinator selection as stabilizing factors on floral evolution in this species. Removal of all rays reduced the pollination success of heads by 31–35%, but did not significantly affect the level of infestation by larvae of the fly Tephritis neesii. Data from F2 plants indicated a potential for indirect selection on ray morphology, mediated through links between ray morphology and measures of vegetative size and plant vigor. The results of this study show that individuals of the normal, rayed phenotype have a clear selective advantage, in terms of both pollinator attraction and general plant vigor. Thus, there were no conflicting selection pressures between the pollinators and the other selective agents considered in this study. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Asteraceae • floral evolution • Leucanthemum vulgare • pollination • selection
in
American Journal of Botany
volume
95
issue
9
pages
1072 - 1078
publisher
Botanical Society of America
external identifiers
  • wos:000259172300003
  • scopus:51349103167
ISSN
0002-9122
DOI
10.3732/ajb.0800087
language
English
LU publication?
yes
id
f61a88bb-7650-49c5-b6d4-d9cffc6f0118 (old id 1397736)
date added to LUP
2009-05-19 15:31:44
date last changed
2017-11-19 04:00:07
@article{f61a88bb-7650-49c5-b6d4-d9cffc6f0118,
  abstract     = {Despite evidence that both pollinators and nonpollinator agents of selection can shape the evolution of floral characters, there have been few attempts to compare the strengths and directions of selection from pollinators and other agents in the same study system. In this investigation of Leucanthemum vulgare, a self-incompatible composite known for its conspicuous white rays, I obtained data from a ray removal experiment in the field and from a segregating F2 population in an experimental garden to assess the role of pollinator and nonpollinator selection as stabilizing factors on floral evolution in this species. Removal of all rays reduced the pollination success of heads by 31–35%, but did not significantly affect the level of infestation by larvae of the fly Tephritis neesii. Data from F2 plants indicated a potential for indirect selection on ray morphology, mediated through links between ray morphology and measures of vegetative size and plant vigor. The results of this study show that individuals of the normal, rayed phenotype have a clear selective advantage, in terms of both pollinator attraction and general plant vigor. Thus, there were no conflicting selection pressures between the pollinators and the other selective agents considered in this study.},
  author       = {Andersson, Stefan},
  issn         = {0002-9122},
  keyword      = {Asteraceae • floral evolution • Leucanthemum vulgare • pollination • selection},
  language     = {eng},
  number       = {9},
  pages        = {1072--1078},
  publisher    = {Botanical Society of America},
  series       = {American Journal of Botany},
  title        = {Pollinator and nonpollinator selection on ray morphology in Leucanthemum vulgare (oxeye daisy, Asteraceae)},
  url          = {http://dx.doi.org/10.3732/ajb.0800087},
  volume       = {95},
  year         = {2008},
}