Cariotipo del pejelagarto tropical Atractosteus tropicus (Lepisosteiformes: Lepisosteidae) y variación cromosómica en sus larvas y adultos

 

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Detalles Bibliográficos
Autores: Arias-Rodríguez, Lenin, Páramo-Delgadillo, Salomón, Contreras-Sánchez, Wilfrido M., Álvarez-González, Carlos A.
Formato: artículo original
Estado:Versión publicada
Fecha de Publicación:2009
Descripción:The karyotype of the tropical gar Atractosteus tropicus is described from conventional Giemsa-staining of 295 mitotic chromosome slides from 120 larvae and 15 adults (five females and ten males) from Tabasco, southern of Mexico. The diploid number 2n = 56 chromosomes was calculated (73 spreads from 206 larval and 208 adult metaphases). Variation on chromosome number was from 46 (4.4%) to 64 (3.9%) chromosome elements on larval samples, whereas 58 (11.7 %) chromosomes were the second most abundant after the diploid number of 2n = 56 (35%). Such variation was related with the presence of mobile microchromosomes. The karyotype was determined from six clear chromosome spreads photographed from three females and three males. The averaged karyotype was integrated by eight pairs of metacentric (m) chromosomes, four submetacentric (sm) pairs, eight telocentric (t) pairs and eight pairs of telocentric micro-chromosomes (*t). The fundamental number was FN = 80 chromosome arms. We saw no sexual differences on chromosome structure.
País:Portal de Revistas UCR
Institución:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Lenguaje:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/5473
Acceso en línea:https://revistas.ucr.ac.cr/index.php/rbt/article/view/5473
Access Level:acceso abierto
Palabra clave:pejelagarto
Lepisosteidae
Atractosteus tropicus
cariotipo
cromosomas
Gar
karyotype
chromosomes