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  Hybridization in the Daphnia galeata complex: are hybrids locally produced?

Spaak, P. (1998). Hybridization in the Daphnia galeata complex: are hybrids locally produced?.

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Spaak_1997a.pdf (Publisher version), 71KB
 
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 Creators:
Spaak, Piet1, Author           
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Free keywords: genetic distances; cladocera; allozymes; genetic diversity
 Abstract: Within the species complex of Daphnia galeata, D. cucullata and D. hyalina various combinations of hybrids and parental taxa occur in lakes throughout Europe. Since daphnids are cyclic parthenogens and mostly reproduce asexually, hybrid populations can be maintained by asexual reproduction and without recurrent hybridization events. Therefore, it is possible that hybridization events have been rare, with range expansion occurring by dispersal of hybrids.

Allozyme data from seven European populations were used to compare genetic variation within and between hybrid and parental taxa. An UPGMA cluster analysis of genetic distances showed that D. cucullata x galeata hybrids from different lakes grouped in different clusters according to the lake from which they were isolated, suggesting multiple hybridization events. Clonal diversity within hybrid taxa was comparable to parental taxa. Furthermore, evidence was found for introgression of the Pgi-S allele from D. cucullata to D. galeata in three lakes. These results indicate that multiple hybridization events within this species complex are likely, and that hybrid taxa can reproduce sexually.

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Language(s): eng - English
 Dates: 1998
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 123204
Other: 1748/S 37392
 Degree: -

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Title: Cladocera: the Biology of Model Organisms
Place of Event: Postojna, Slovenia
Start-/End Date: 1996-08-08 - 1996-08-15

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Title: Proceedings of the Fourth International Symposium on Cladocera
Source Genre: Issue
 Creator(s):
Brancelj, A., Editor
De Meester, L.1, Editor           
Spaak, P.1, Editor           
Affiliations:
1 Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547            
Publ. Info: -
Pages: XII, 303 p. Volume / Issue: - Sequence Number: - Start / End Page: 127 - 133 Identifier: -

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Title: Hydrobiologia
Source Genre: Journal
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Publ. Info: Springer Nature
Pages: XII, 303 p. Volume / Issue: 360 (1-3) Sequence Number: - Start / End Page: 127 - 133 Identifier: ISSN: 0018-8158
CoNE: https://pure.mpg.de/cone/journals/resource/954925565693