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Delayed stigma receptivity in Collinsia heterophylla (Plantaginaceae): Genetic variation and adaptive significance in relation to pollen competition, delayed self-pollination and mating-system evolution

Lankinen, Åsa LU ; Armbruster, W. Scott and Antonsen, Liv (2007) In American Journal of Botany 94(7). p.1183-1192
Abstract
To increase our knowledge about mating-system evolution, we need to understand the relationship between specific floral traits and mating system. Species of Collinsia (Plantaginaceae) vary extensively in mating system; this variation is associated with variation in floral morphology and development and with the timing of self-pollination. Counterintuitively, large-flowered, more outcrossing species tend to have delayed stigma receptivity, reducing the amount of time that the stigma is receptive to cross-pollination before autonomous self-pollination. To understand how the timing of stigma receptivity is related to mating-system evolution, we studied in detail the timing of both stigma receptivity and self-pollination (anther-stigma... (More)
To increase our knowledge about mating-system evolution, we need to understand the relationship between specific floral traits and mating system. Species of Collinsia (Plantaginaceae) vary extensively in mating system; this variation is associated with variation in floral morphology and development and with the timing of self-pollination. Counterintuitively, large-flowered, more outcrossing species tend to have delayed stigma receptivity, reducing the amount of time that the stigma is receptive to cross-pollination before autonomous self-pollination. To understand how the timing of stigma receptivity is related to mating-system evolution, we studied in detail the timing of both stigma receptivity and self-pollination (anther-stigma contact) in two greenhouse-grown populations of large-flowered Collinsia heterophylla. Crosses on emasculated flowers at different stages of floral development always produced seeds, suggesting that cross-fertilization can be effected by pollen arriving prior to physiological receptivity. Phenotypic and genetic variation within populations in the timing of stigma receptivity and antherstigma contact was substantial, although slightly less for the contact. Despite strong interspecific and interpopulation correlations, we did not find an among-genet phenotypic correlation between the traits. This indicates that each trait may respond independently to selection, and the trait association may be the result of correlational selection. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
mixed mating system, heritability, delayed selfing, Collinsia heterophylla, delayed stigma receptivity, flower development, evolvability, Plantaginaceae
in
American Journal of Botany
volume
94
issue
7
pages
1183 - 1192
publisher
Botanical Society of America
external identifiers
  • wos:000249830800011
  • scopus:34447319655
ISSN
0002-9122
language
English
LU publication?
yes
id
54898780-de0b-4f85-9a99-ca16b7a53989 (old id 656295)
alternative location
http://www.amjbot.org/cgi/content/abstract/94/7/1183
date added to LUP
2007-12-14 12:52:23
date last changed
2017-10-22 04:39:27
@article{54898780-de0b-4f85-9a99-ca16b7a53989,
  abstract     = {To increase our knowledge about mating-system evolution, we need to understand the relationship between specific floral traits and mating system. Species of Collinsia (Plantaginaceae) vary extensively in mating system; this variation is associated with variation in floral morphology and development and with the timing of self-pollination. Counterintuitively, large-flowered, more outcrossing species tend to have delayed stigma receptivity, reducing the amount of time that the stigma is receptive to cross-pollination before autonomous self-pollination. To understand how the timing of stigma receptivity is related to mating-system evolution, we studied in detail the timing of both stigma receptivity and self-pollination (anther-stigma contact) in two greenhouse-grown populations of large-flowered Collinsia heterophylla. Crosses on emasculated flowers at different stages of floral development always produced seeds, suggesting that cross-fertilization can be effected by pollen arriving prior to physiological receptivity. Phenotypic and genetic variation within populations in the timing of stigma receptivity and antherstigma contact was substantial, although slightly less for the contact. Despite strong interspecific and interpopulation correlations, we did not find an among-genet phenotypic correlation between the traits. This indicates that each trait may respond independently to selection, and the trait association may be the result of correlational selection.},
  author       = {Lankinen, Åsa and Armbruster, W. Scott and Antonsen, Liv},
  issn         = {0002-9122},
  keyword      = {mixed mating system,heritability,delayed selfing,Collinsia heterophylla,delayed stigma receptivity,flower development,evolvability,Plantaginaceae},
  language     = {eng},
  number       = {7},
  pages        = {1183--1192},
  publisher    = {Botanical Society of America},
  series       = {American Journal of Botany},
  title        = {Delayed stigma receptivity in Collinsia heterophylla (Plantaginaceae): Genetic variation and adaptive significance in relation to pollen competition, delayed self-pollination and mating-system evolution},
  volume       = {94},
  year         = {2007},
}