Extreme chromosomal polytypy in a population of sceloporus grammicus (sauria: phrynosomatidae) at santuario mapethé, Hidalgo, México

Irene Goyenechea, Fernando Mendoza-Quijano, Oscar Flores-Villela, Kent M. Reed

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The karyotypic status of the mesquite lizard, Sceloporus grammicas, was investigated at two localities at Saniuario Mapethé, Hidalgo, México. A total of 23 different karyotypes was recorded from the 36 individuals examined. Individual lizards were heterozygous at up to four chromosomes. Karyotypic differences were attributed to Robertsonian fission/fusions and pericentric inversions involving the macrochromosomes. The polymorphisms generally conformed to Hardy-Weinberg equilibrium suggesting a lack of underdominance for most rearrangements. The extreme chromosomal polytypy observed at Santuario Mapethé is hypothesized to result from parapatric hybridization between two chromosome races.

Original languageEnglish (US)
Pages (from-to)39-46
Number of pages8
JournalJournal of Herpetology
Volume30
Issue number1
DOIs
StatePublished - 1996

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