Unreduced gametes: Meiotic mishap or evolutionary mechanism?

Mason, Annaliese S and Pires, J. Chris (2015) Unreduced gametes: Meiotic mishap or evolutionary mechanism?. Trends in Genetics, 31 1: 5-10. doi:10.1016/j.tig.2014.09.011


Author Mason, Annaliese S
Pires, J. Chris
Title Unreduced gametes: Meiotic mishap or evolutionary mechanism?
Journal name Trends in Genetics   Check publisher's open access policy
ISSN 1362-4555
0168-9525
Publication date 2015-01-01
Year available 2015
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1016/j.tig.2014.09.011
Volume 31
Issue 1
Start page 5
End page 10
Total pages 6
Place of publication Oxford, United Kingdom
Publisher Elsevier Ltd
Collection year 2016
Language eng
Abstract Unreduced gametes (gametes with the somatic chromosome number) are known to facilitate polyploid formation. Unreduced gametes result from a plethora of different mechanisms across different taxa, suggesting that the ability to produce unreduced gametes has evolutionary utility. Heritable genetic variation for unreduced gamete production has been observed, thereby providing an evolutionary substrate. Unreduced gametes are also frequently involved in interspecific hybridisation events as well as being produced by interspecific hybrids, facilitating allopolyploidisation. Environmental stress often triggers unreduced gamete production, suggesting that unreduced gametes may facilitate polyploid speciation in response to changing environments. Thus, although unreduced gamete formation may be a meiotic mishap, we suggest that unreduced gametes can be more explicitly considered as a mechanism for evolutionary speciation that should be measured and tested across and within lineages for exaptive evolution (a feature with evolutionary utility that has not arisen under conventional selective pressure) and evolvability (the capacity to generate adaptive genetic variation).
Keyword Unreduced gametes
Meiosis
Hybrid speciation
Polyploidy
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Centre for Integrative Legume Research Publications
School of Agriculture and Food Sciences
Official 2016 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 21 times in Scopus Article | Citations
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