Chromosomal evidence for laboratory synthesis of a triploid hybrid between the gynogenetic teleost Poecilia formosa and its host species |
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| Authors: | I. Nanda,M. Schartl,&dagger ,W. Feichtinger,I. Schlupp,&Dagger ,J. Parzefall,&Dagger M. Schmid |
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| Affiliation: | Institut für Humangenetik am Biozentrum, Theodor-Boveri-Institut für Biowissenschaften am Biozentrum der Universität, Würzburg;Physiologische Chemie I, Theodor-Boveri-Institut für Biowissenschaften am Biozentrum der Universität, Würzburg;Zoologisches Institut und Zoologisches Museum der Universität, Hamburg, Germany |
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| Abstract: | Cytogenetic analyses were performed on a triploid hybrid individual produced in the laboratory by mating Poecilia formosa , an all-female gynogenetic diploid species, with a normal male of melanistic ornamental Poecilia sphenops (black molly). Direct chromosome preparations revealed 69 (3n) chromosomes in the somatic complement. This cytogenetic observation in conjunction with the pigmentation phenotype leads us to conclude that occasional failure of sperm exclusion may result in the presence of triploid hybrids even in the natural habitats. |
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| Keywords: | Amazon molly gynogenesis triploids sperm exclusion |
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