Journal article
Gametogenesis of intergroup hybrids of hemiclonal frogs
Genetical Research, v 89(1)
Feb 2007
PMID: 17517158
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
European water frog hybrids Rana esculenta (R. ridibunda×R. lessonae) reproduce hemiclonally, by hybridogenesis: in the germ line they exclude the genome of one parental species and produce haploid gametes with an unrecombined genome of the other parental species. In the widespread L-E population system, both sexes of hybrids (E) coexist with R. lessonae (L). They exclude the lessonae genome and produce ridibunda gametes. In the R-E system, hybrid males coexist with R. ridibunda (R); they exclude either their ridibunda or their lessonae genome and produce sperm with a lessonae or with a ridibunda genome or a mixture of both kinds of sperm. We examined 13 male offspring, 12 of which were from crosses between L-E system and R-E system frogs. All were somatically hybrid. With one exception, they excluded the lessonae genome in the germ line and subsequently endoreduplicated the ridibunda genome. Spermatogonial metaphases contained a haploid or a diploid number of ridibunda chromosomes, identified through in situ hybridization to a satellite DNA marker, and by spermatocyte I metaphases containing a haploid number of ridibunda bivalents. The exception, an F1 hybrid between L-E system R. lessonae and R-E system R. ridibunda, was not hybridogenetic, showed no genome exclusion, and evidenced a disturbed gametogenesis resulting from the combination of two heterospecific genomes. None of the hybridogenetic hybrids showed any cell lines excluding the ridibunda genome, the pattern most frequent in hybrids of the R-E system, unique to that system, and essential for its persistence. A particular combination of R-E system lessonae and R-E system ridibunda genomes seems necessary to induce the R-E system type of hemiclonal gametogenesis.
Metrics
Details
- Title
- Gametogenesis of intergroup hybrids of hemiclonal frogs
- Creators
- MATILDE Ragghianti - University of PisaSTEFANIA Bucci - University of PisaSILVIA Marracci - University of PisaCLAUDIO Casola - University of PisaGIORGIO Mancino - University of PisaHANSJÜRG Hotz - University of ZurichGASTON-DENIS Guex - University of ZurichJÖRG Plötner - Humboldt-Universität zu BerlinTHOMAS Uzzell - Drexel University
- Publication Details
- Genetical Research, v 89(1)
- Publisher
- Cambridge University Press
- Number of pages
- 7
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000247188500005
- Scopus ID
- 2-s2.0-34249735906
- Other Identifier
- 991019350596704721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Genetics & Heredity