Long-wavelength sensitive opsin (LWS) gene variability in Neotropical cichlids (Teleostei: Cichlidae)
An. acad. bras. ciênc
;
89(1): 213-222, Jan,-Mar. 2017. tab, graf
Artículo
en Inglés
| LILACS
| ID: biblio-886631
ABSTRACT
ABSTRACT Cichlid fishes are an important group in evolutionary biology due to their fast speciation. This group depends widely of vision for feeding and reproduction. During the evolutionary process it plays a significant role in interspecific and intraspecific recognition and in its ecology. The molecular basis of vision is formed by the interaction of the protein opsin and retinal chromophore. Long-wavelength sensitive opsin (LWS) gene is the most variable among the opsin genes and it has an ecological significance. Current assay identifies interspecific variation of Neotropical cichlids that would modify the spectral properties of the LWS opsin protein and codons selected. Neotropical species present more variable sites for LWS gene than those of the African lakes species. The LWS opsin gene in Crenicichla britskii has a higher amino acid similarity when compared to that in the African species, but the variable regions do not overlap. Neotropical cichlids accumulate larger amounts of variable sites for LWS opsin gene, probably because they are spread over a wider area and submitted to a wider range of selective pressures by inhabiting mainly lotic environments. Furthermore, the codons under selection are different when compared to those of the African cichlids.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Variación Genética
/
Opsinas de Bastones
/
Cíclidos
Tipo de estudio:
Estudio diagnóstico
/
Estudio pronóstico
Límite:
Animales
País/Región como asunto:
Africa
/
America del Sur
/
Brasil
Idioma:
Inglés
Revista:
An. acad. bras. ciênc
Asunto de la revista:
Ciencia
Año:
2017
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Estadual de Maringá/BR
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