Pollen competition is the mechanism underlying a variety of evolutionary phenomena in dioecious plants.
Rumex
Silene
gametophyte
gene expression
haploid selection
sex-chromosome evolution
sex-ratio bias
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
11 2019
11 2019
Historique:
received:
26
02
2019
accepted:
16
04
2019
pubmed:
23
4
2019
medline:
23
7
2020
entrez:
23
4
2019
Statut:
ppublish
Résumé
It has long been known that more pollen grains often arrive on stigmas than there are ovules to fertilize, resulting in pollen competition. Moreover, this competition among pollen grains (gametophytes) depends, in part, on their extensive haploid gene expression. Here I review how this leads to a variety of phenomena in dioecious plants of interest to evolutionary biologists. For example, pollen competition can lead to extreme female-biased sex ratios. In addition, gene expression by individual pollen grains can slow mutation accumulation and degeneration of the Y chromosome. Lastly, I review work on how the haploid selection resulting from pollen competition has been proposed to influence which alleles are linked to the Y chromosome, and some recent empirical evidence in support of this theory.
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
1075-1079Informations de copyright
© 2019 The Author. New Phytologist © 2019 New Phytologist Trust.
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