Cytogenetic nomenclature of deer mice, <i>Peromyscus </i>(Rodentia): revision and review of the standardized karyotype

Abstract

A revision of the standardized karyotype of deer mice (Peromyscus) is presented. This revision addresses shortcomings of the original standardization, contains a substantial increase in the number of G-band markers and provides a nomenclature for the G-bands of each autosome and the X chromosome. Using the revised standardized karyotype, we specify the particular G-bands or patterns that identify each chromosome and catalog the more problematic chromosome identifications and likely misidentifications. For each chromosome, we present an overview of previously reported variation in euchromatic arrangement and heterochromatic constitution. We then review previous applications of the standardized karyotype and summarize the predominant findings from cytogenetic and cytosystematic studies of Peromyscus and related taxa.

The genetic basis of parental care evolution in monogamous mice

“…This produced a map of with 23 autosomal linkage groups as expected based on the number of P. maniculatus chromosomes 40,41 . The X chromosome markers were identified via model-based clustering that uses the heterozygote frequencies of markers in males and in females, using the Mclust function in the mclust package in R 42 .…”

Comparative cytogenetics of hamsters of the genus <i>Calomyscus</i>

“…Based on external appearance, Calomyscus has been associated with New World sigmodontines (see Carleton and Musser, 1984). Conventionally stained and banded karyotypes of Calomyscus actually resemble those of the American deer mouse, Peromyscus, particularly in the presence and variation of the heterochromatic small arms (e.g., Robbins and Baker, 1981;Rogers et al, 1984;Greenbaum et al 1994). However, we have not found any clear G-band homologies between the karyotypes of Calomyscus and Peromyscus.…”

Brief communication. Systematic implications of chromosomal data from two insular species of Peromyscus from the Gulf of California

“…Indeed, the only character state that distinguishes the banded chromosomes of P. sejugis from those reported for P. maniculatus is an alternative biarmed condition of chromosome 13. In P. sejugis ( Figures 2 and 3), the centromere of chromosome 13 is located between bands A3 and A4 ( BЈ condition), whereas in P. maniculatus (Greenbaum et al 1994) the centromere of chromosome 13 is situated between bands A1 and B1 ( B and Bϩ condition). This difference is most parsimoniously explained by independent pericentric inversions of the primitive acrocentric condition of chromosome 13 ( Figure 3).…”

“…Nondifferentially (Giemsa)-stained metaphases were used to determine diploid and autosomal arm numbers (2n and FN, respectively). Chromosomes were G-banded following the GTG technique of Verma and Babu (1995) and identified and numbered according to the standardized karyotype of Peromyscus (Greenbaum et al 1994). C bands were produced by a modification of the method of Sumner (1972).…”

“…Despite the maintenance of a constant diploid number of 48, analyses of chromosomal variation and differentiation resulting from pericentric inversions have facilitated the resolution of a variety of systematic and taxonomic questions within Peromyscus (for a review see Greenbaum et al 1994). Cladistic analyses of banded chromosomal data (Rogers et al 1984;Smith 1990;Stangl and Baker 1984) have provided phylogenetic hypotheses for the majority of the approximately 60 species of Peromyscus.…”