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Fox JA, Dybdahl MF, Jokela J, et al. GENETIC STRUCTURE OF COEXISTING SEXUAL AND CLONAL SUBPOPULATIONS IN A FRESHWATER SNAIL (POTAMOPYRGUS ANTIPODARUM). Evolution. 1996;50(4):1541-1548doi: 10.1111/j.1558-5646.1996.tb03926.x.
Fox, J. A., Dybdahl, M. F., Jokela, J., & Lively, C. M. (1996). GENETIC STRUCTURE OF COEXISTING SEXUAL AND CLONAL SUBPOPULATIONS IN A FRESHWATER SNAIL (POTAMOPYRGUS ANTIPODARUM). Evolution; international journal of organic evolution, 50(4), 1541-1548. https://doi.org/10.1111/j.1558-5646.1996.tb03926.x
Fox, Jennifer A, et al. "GENETIC STRUCTURE OF COEXISTING SEXUAL AND CLONAL SUBPOPULATIONS IN A FRESHWATER SNAIL (POTAMOPYRGUS ANTIPODARUM)." Evolution; international journal of organic evolution vol. 50,4 (1996): 1541-1548. doi: https://doi.org/10.1111/j.1558-5646.1996.tb03926.x
Fox JA, Dybdahl MF, Jokela J, Lively CM. GENETIC STRUCTURE OF COEXISTING SEXUAL AND CLONAL SUBPOPULATIONS IN A FRESHWATER SNAIL (POTAMOPYRGUS ANTIPODARUM). Evolution. 1996 Aug;50(4):1541-1548. doi: 10.1111/j.1558-5646.1996.tb03926.x. PMID: 28565708.
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Evolution. 1996 Aug;50(4):1541-1548. doi: 10.1111/j.1558-5646.1996.tb03926.x.

GENETIC STRUCTURE OF COEXISTING SEXUAL AND CLONAL SUBPOPULATIONS IN A FRESHWATER SNAIL (POTAMOPYRGUS ANTIPODARUM).

Evolution; international journal of organic evolution

Jennifer A Fox, Mark F Dybdahl, Jukka Jokela, Curtis M Lively

Affiliations

  1. Department of Biology, Indiana University, Bloomington, Indiana, 47405.
  2. Laboratory of Ecological Zoology, University of Turku, FIN-20500, Finland.

PMID: 28565708 DOI: 10.1111/j.1558-5646.1996.tb03926.x

Abstract

We examined clonal diversity and the distribution of both clonal and sexual genotypes in a single population of freshwater snails (Potamopyrgus antipodarum) in which diploid sexual individuals and triploid parthenogens coexist. A genetic analysis of individuals from three habitat zones in Lake Alexandrina, New Zealand revealed extremely high clonal diversity: 165 genotypes among 605 clonal individuals. The frequency of triploid clonal individuals increased with increasing depth in the lake, and most of the individual clones were habitat specific, suggesting that differences among habitats are important in structuring the clonal subpopulation. There were also high levels of clonal diversity within habitats, suggesting frequent origins of habitat-specific clones. In contrast, diploid sexual individuals were proportionately more common in the shallow regions of the lake (where infection by trematode larvae is highest), and there was no significant spatial structure in the sexual subpopulation. We suggest that habitat specialization by clones, as well as parasite-mediated selection against common clones, are important factors affecting the structure of this mixed population of sexual and clonal snails.

© 1996 The Society for the Study of Evolution.

Keywords: Clonal diversity; Potamopyrgus antipodarum; frozen niche variation hypothesis; general-purpose genotype hypothesis; parthenogenesis; sexual reproduction

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