Chromosomal Evolution in Rodents

Nadler, Charles F.

doi:10.1007/978-3-642-85943-4_18

Cited by 19 publications

(10 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fossil evidence also showed that Anteliomys fauna occurs later than Eothenomys fauna (Zheng 1993). For the mode and direction of chromosomal evolution in rodents, Nadler (1969) proposed the fusion hypothesis that centric fusion is the commonest mechanism of structural rearrangement. Most species of the tribe Clethrionomyini have diploid number that vary between 54-56 with FN between 54-60.…”

Section: Discussionmentioning

confidence: 99%

Chromosome Study of Yulong Vole (Eothenomys proditor).

et al. 1998

View full text Add to dashboard Cite

Summary A first description of the karyotype of Yulong vole (Eothenomys proditor) is presented. Karyotype studies were carried out using conventional staining, G-banding, C-banding and silverstaining. Yulong vole was sharp different from other allied voles on karyotype. The diploid number is 2n=32, with the fundamental number of 56. The autosomes consist of 13 pairs of meta-/submetacentric elements and two pairs of arcrocentric elements. The X chromosome is medium sized and submetacentric, whereas the Y chromosome is small and subacrocentric. The G-banding allows to identify chromosome pairing and to detect the chromosome rearrangements intervening in karyotypic differentiation. In the C-banded karyotype, the centromeric heterochromatin is observed in Nos. 2, 4 and 12 chromosomes, the terminal C-band is found in No. 13 and X chromosomes. Y chromosome is completely C-band-positive, moreover, the interstial distribution of C-bands has been demonstrated on the biarm of No. 2 chromosome pair and the long arm of Nos. 2, 9 and 10 chromosomes respectively. Nucleolus organizer regions (NORs) appeared in the long arm of Nos.

show abstract

Section: Discussionmentioning

confidence: 99%

Chromosome Study of Yulong Vole (Eothenomys proditor).

et al. 1998

View full text Add to dashboard Cite

show abstract

“…He concluded from these data that the genus Alticola and the majority of species in the genus Clelhrionomys are of monophyletic origin. Because of the con stant diploid number of chromosomes and the rarity of interspe cific chromosomal rearrangements (Nadler et al, 1976). the karyotypes in these two genera appear to be conservatively fixed among the karyotypically diverse Arvicolidae family.…”

Section: Discussionmentioning

confidence: 99%

Karyotypes and systematics of Asian high-mountain voles, genus <i>Alticola </i>(Rodentia, Arvicolidae)

Hielscher¹,

Stubbe²,

Zernahle

et al. 1992

Cytogenet Genome Res

View full text Add to dashboard Cite

Six species/subspecies of Asian high-mountain voles, genus Alticola, were studied cytogenetically via conventional staining and C- and G-banding. The karyotypes are very similar. The standard karyotype, as in A. strelzovi strelzovi, consists of 56 chromosomes. These are split into 25 acrocentric pairs, one large subtelocentric pair, one small metacentric pair, a large acrocentric X chromosome, and a small Y chromosome, which varies in shape. Constitutive heterochromatin is almost entirely restricted to small centromeric regions. A small submetacentric pair of autosomes in both subspecies of A. semicanus and a medium-sized Y chromosome in A. argentatus severtzovi are of importance in systematics. The data suggest that A. barakshin, A. semicanus, and A. argentatus are separate species.

show abstract

“…Diploid (2n) chromosome numbers vary from 22 to 46 (Cole, 1970(Cole, , 1971Hall, 1973), a range exceeding that known for any other lizard genus. Because comparable variation has been detected in several groups of vertebrates, including other lizard genera (Gorman and Atkins, 1968;Matthey and van Brink, 1960) and rodents (review by Nadler, 1969), and in many invertebrates, evolutionists are becoming increasingly concerned with the role of karyotypic changes in animal speciation (White, 1969;Mayr, 1969Mayr, , 1970.…”

mentioning

confidence: 98%