Microsatellites reveal high levels of gene flow among populations of the California squid Loligo opalescens

Microsatellites reveal high levels of gene flow among populations of the California squid Loligo... Information on the extent of genetic differentiation among populations of the squid Loligo opalescens is crucial for the conservation of this commercially utilized species. We analysed six highly variable microsatellite loci in 11 collections of L. opalescens from different locations and spawning seasons to estimate the relative influence of two major evolutionary forces, gene flow and genetic drift. Microsatellite allele frequency patterns suggest that gene flow prevents population differentiation in L. opalescens. Tests for genetic differentiation showed homogeneity of the samples with an overall FST/RST of 0.0028/−0.0013. Genetic uniformity among samples from different year classes indicates that allele frequency patterns in L. opalescens are relatively stable over time. However, a more complete and detailed picture of fine‐scale allele frequency shifts in this species will require a systematic microsatellite analysis of local populations over consecutive spawning cycles. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Molecular Ecology Wiley

Microsatellites reveal high levels of gene flow among populations of the California squid Loligo opalescens

Molecular Ecology, Volume 10 (5) – May 1, 2001

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Publisher
Wiley
Copyright
Copyright © 2001 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0962-1083
eISSN
1365-294X
D.O.I.
10.1046/j.1365-294X.2001.01257.x
Publisher site
See Article on Publisher Site

Abstract

Information on the extent of genetic differentiation among populations of the squid Loligo opalescens is crucial for the conservation of this commercially utilized species. We analysed six highly variable microsatellite loci in 11 collections of L. opalescens from different locations and spawning seasons to estimate the relative influence of two major evolutionary forces, gene flow and genetic drift. Microsatellite allele frequency patterns suggest that gene flow prevents population differentiation in L. opalescens. Tests for genetic differentiation showed homogeneity of the samples with an overall FST/RST of 0.0028/−0.0013. Genetic uniformity among samples from different year classes indicates that allele frequency patterns in L. opalescens are relatively stable over time. However, a more complete and detailed picture of fine‐scale allele frequency shifts in this species will require a systematic microsatellite analysis of local populations over consecutive spawning cycles.

Journal

Molecular EcologyWiley

Published: May 1, 2001

References

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