Bandas cromosómicas C de los géneros Romerolagus, Sylvilagus y Lepus (Mammalia: Lagomorpha) de México.

Consuelo Lorenzo, Fernando A. Cervantes, Francisco X. González

Resumen


Resumen: El patrón de bandas cromosómicas C de especies representantes de los tres géneros de lepóridos (conejos y liebres) que existen en México fue comparado, con el fin de analizar la variación en la cantidad de heterocromatina constitutiva y evaluar su papel en la diversificación de los lepóridos. Se observó que existen diferencias en la cantidad de heterocromatina constitutiva entre ellos. Sylvilagus presentó una mayor cantidad de este material mientras que Lepus se caracterizó por mostrar cantidades reducidas. El género Romerolagus se colocó en un lugar intermedio entre Sylvilagus y Lepus al presentar cantidades moderadas de heterocromatina. En todas las especies estudiadas la heterocromatina constitutiva se encontró alrededor del centrómero, de manera que las diferencias observadas se deben a la cantidad de heterocromatina constitutiva que presentan los géneros de lepóridos mexicanos.

Abstract: The C-banded pattern of selected species representing the three Mexican leporid genera were compared. It was shown that there are noticeable differences in the amount of constitutive heterochromatin among them. Sylvilagus was characterized by large quantities, while Lepus showed small amounts of this material. Romerolagus was placed in a intermediate position by holding moderate quantities of heterochromatin. The distribution of the constitutive heterocromatin was pericentromeric in all the species examined. This suggests that the differences observed among the genera, are due to the distinct amounts of constitutive heterochromatin. Romerolagus and Sylvilagus are the most similar to each other as they share similar amounts of constitutive heterochromatin distributed in the same pattern.

Palabras Clave: Bandas cromosómicas, mamíferos, lagomorfos, Romerolagus, SylvilagusLepus, México.


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DOI: http://dx.doi.org/10.22201/ie.20074484e.1999.4.1.83

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