Chromosomal Evidence for a Major Subdivision in Peromyscus leucopus

Baker, Robert J.; Robbins, Lynn W.; Stangl, Frederick B.; Birney, Elmer C.

doi:10.2307/1380579

Cited by 41 publications

(15 citation statements)

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“…1976: Robbins and Baker. 1981: Baker et al. 1983 have reported the presence of inconsistent intersti tial C-bands in Chr 1.4 and 7 in P. leucopus.…”

Section: Autosom Al Heterochromatinmentioning

confidence: 99%

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

Greenbaum

Gunn²,

Smith³

et al. 1994

Cytogenet Genome Res

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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.

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“…1976: Robbins and Baker. 1981: Baker et al. 1983 have reported the presence of inconsistent intersti tial C-bands in Chr 1.4 and 7 in P. leucopus.…”

Section: Autosom Al Heterochromatinmentioning

confidence: 99%

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

Greenbaum

Gunn²,

Smith³

et al. 1994

Cytogenet Genome Res

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“…1978;Greenbaum et al, 1978«, b;Yates et al, 1979;Robbins and Baker. 1981;Baker et al 1983;Rogers. 1983).…”

mentioning

confidence: 99%

“…1978;Carleton el al, 1982;Baker et al 1983). Only in P manicu latus (and the allied species P sitkensis) is a variety of both heterochromatin and pericentric inversion polymorphisms known to account for substantial in-terpopulational and intrapopulational chromosomal variability (Greenbaum ct al.…”

mentioning

confidence: 99%

Evidence for heterosynaptic pairing of the inverted segment in pericentric inversion heterozygotes of the deer mouse (Peromyscus maniculatus)

Greenbaum¹,

Reed²

1984

Cytogenet Genome Res

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Silver-stained pachytene cells of male deer mice, Peromyscus maniculatus, which were heterozygous for a naturally occurring pericentric inversion of chromosome 6, were analyzed by light microscopy. The presence of the terminally positioned inversion, involving approximately 30% of the length of chromosome 6, was detected by G-banding. Within the inversion, C-band-positive heterochromatin was restricted to the centromeric region. Silver-staining of spermatocytes revealed the synaptonemal complexes (SCs) of the autosomal bivalents and the X-Y chromosome association. Pachytene cells were scored for the presence of inversion loops corresponding to the pericentric inversion of chromosome 6. Possible loop 6 configurations were detected in less than 1% of the cells examined, the vast majority of cells having regularly formed autosomal SCs similar to those reported for homomorphic chromosome pairs in other rodent species. It appears, therefore, that in these mice the inverted region of chromosome 6 was heterosynaptic throughout pachytene. Heterosynapsis is hypothesized as a mechanism which might obviate the production of duplication and deletion chromatids expected from crossing-over in pericentric inversion loops. The observation of heterosynaptic pairing in the inverted segment and the hypothesis of inversion heterosynapsis as a mechanism averting gametic loss are consistent with the widespread occurrence of pericentric inversion polymorphisms in P maniculatus and the apparent failure of pericentric inversions to genetically isolate populations of this species.

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“…Chromosomal data were primary in the discovery and recognition of the specific status of P. hooperi (Lee and Schmidly 1977), P. gratus (Modi and Lee 1984), P. beatae, P. levipes, and P. rowleyi (Houseal et al 1987). Analysis of karyotypic variation in P. leucopus (Baker et al 1983) revealed previously unsuspected differentiation of northeastern and southwestern chromosomal races. Karyotypic data also provided the discrete variation that led to the recognition of the specific distinction between P. oreas and P. maniculatus (Gunn and Greenbaum 1986;Gunn 1988) and, ultimately, to the relegation of P. oreas and P. sitkensis to P. keeni (Hogan et al 1993).…”

Section: Introductionmentioning

confidence: 99%

Twinning and fetal sex ratio in moose: effects of maternal age and mass

Nygrén¹,

Kojola²

1997

Can. J. Zool.

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The karyotypes of deer mice (Peromyscus maniculatus) from populations of five subspecies from the northeastern United States and eastern Canada were analyzed by G-and C-banding. Within an invariant diploid number of 48, intra-and inter-populational variation in the number of autosomal arms (80-86) was attributable to a pericentric inversion (chromosome 8) and (or) the presence of heterochromatic short arms (chromosomes 8, 10, 12, and 19). The plesiomorphic (noninverted) condition of chromosome 10 in these five populations is unique among deer mice; previous chromosome-banding studies of P. maniculatus report data for geographically central or western populations and indicate only the derived (inverted) condition of chromosome 10. As the plesiomorphic condition of chromosome 10 is apparently restricted to the northeastern forest form of P. maniculatus, the morphology of this chromosome potentially represents a simple and discrete character for resolving the historically problematic question of the specific status of the eastern grassland and forest morphotypes of deer mice.Résumé : Les caryotypes ont été analysés par coloration des bandes G et C chez des populations de cinq sous-espèces de Souris sylvestres (Peromyscus maniculatus) du nord-est des États-Unis et de l'est du Canada. Avec un nombre diploïde invariable de 48, la variation intra-et inter-populations du nombre de bras autosomiques (80-86) a été attribuée à une inversion péricentrique (chromosome 8) et (ou) à la présence de bras hétérochromatiques courts (chromosomes 8, 10, 12 et 19). La condition plésiomorphe (non inversée) du chromosome 10 chez ces cinq populations est unique chez les Souris sylvestres; les études antérieures sur les bandes chromosomiques de P. maniculatus ont été faites sur des populations du centre et de l'ouest et elles n'indiquent que la condition dérivée (inversée) du chromosome 10. Comme la condition plésiomorphe du chromosome 10 est apparemment restreinte à la forme forestière du nord-est, la morphologie de ce chromosome fournira peut-être une solution simple à la question historiquement problématique du statut spécifique des morphotypes des plaines herbeuses et des forêts de l'est. [Traduit par la Rédaction]

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Chromosomal Evidence for a Major Subdivision in Peromyscus leucopus

Cited by 41 publications

References 0 publications

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

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

Evidence for heterosynaptic pairing of the inverted segment in pericentric inversion heterozygotes of the deer mouse <i>(Peromyscus maniculatus</i><i>)</i>

Twinning and fetal sex ratio in moose: effects of maternal age and mass

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