Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/2425
Título: Fertile triploid males - An uncommon case among hybrid vertebrates
Autor: Santos, Carla Sousa
Collares-Pereira, Maria João
Almada, Vítor Carvalho
Data: 2007
Editora: Wiley-Liss
Citação: Journal of Experimental Zoology, 307A, 220-225
Resumo: The endemic Iberian minnow Squalius alburnoides is a complex of fishes of hybrid origin including both males and females with distinct ploidy levels and varying proportions of the parental genomes. In this paper we demonstrated that in contrast to many vertebrate hybrid lineages the sperm of triploid hybrid males of S. alburnoides is viable and fully functional. Flow cytometry and analysis of sequences of a fragment of the beta-actin nuclear gene applied to progenitors and offspring evidenced that these males produced their sperm clonally, as already described for diploid hybrids. The presence of different types of fertile males (nonhybrid diploids with normal meiosis and both diploid and triploid hybrids) coupled with hybridogenetic meiosis in females endows this vertebrate complex with a high level of independence from other species and contributes to maintain its genetic variability.
Peer review: yes
URI: http://hdl.handle.net/10400.12/2425
ISSN: 1932-5223
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

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