Karyotypic variation between wood mouse species: banded chromosomes of Apodemus alpicola and A. microps

Reutter, Brigitte A.; Nová, Petra; Vogel, Peter; Zima, Jan

doi:10.4098/at.arch.01-39

Cited by 7 publications

(7 citation statements)

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“…The diploid chromosome numbers and fundamental numbers found in this study were the same as those reported (Vujosevic et al 1984, Reutter et al 2001. In contrast, accumulation of several chromosome rearrangements has occurred in the lineage leading to A. agrarius Figure 3a).…”

Section: G-bandingsupporting

confidence: 90%

“…Serizawa et al (2000) Comparative studies of the karyotypes in this genus have been performed using chromosomal banding techniques (Soldatovic et al 1975, Yoshida et al, 1975, Vujosevic et al 1984, Saitoh & Obara 1986, Orlov et al 1996, Reutter et al 2001. The diploid chromosome number of most Apodemus species is 2n = 46 -48, and their fundamental number (FN) ranges from 48 to 56.…”

Section: Introductionmentioning

confidence: 99%

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Karyotypic Evolution of Apodemus (Muridae, Rodentia) Inferred from Comparative FISH Analyses

et al. 2004

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SummaryWe conducted comparative FISH analyses to investigate the chromosomal rearrangements that have occurred during the evolution of the rodent genus Apodemus, which inhabits broadleaf forests in the temperate zone of the Palaearctic region. Chromosome-specific painting probes of the laboratory mouse were hybridized to chromosomes of seven Apodemus species, A. agrarius, A. argenteus, A. gurkha, A. peninsulae, A. semotus, A. speciosus and A. sylvaticus, and homologous chromosomal regions were determined in the species for the study of karyotypic evolution. Differences in the hybridization patterns were found in nine pairs of autosomes among the seven species. The chromosomal location of the 5S rRNA genes on the telomeric region of chromosome 20 was highly conserved in all the species. In contrast, there was much wider variation in the location of the 18S-28S rRNA genes, although the 18S-28S rRNA genes were predominantly located on chromosomes 7, 8 and 12. Phylogenetic relationships of the seven Apodemus species were inferred from the chromosome rearrangements and the chromosomal distribution patterns of the 18S-28S rRNA genes. The karyotypic relationships correlated well with the molecular phylogeny, and A. semotus had the most highly conserved karyotype among the seven species.

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Section: G-bandingsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Karyotypic Evolution of Apodemus (Muridae, Rodentia) Inferred from Comparative FISH Analyses

et al. 2004

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“…The best-studied example of such variation in mammals is the occurrence of so-called giant sex chromosomes originating from heterochromatin amplification in certain species of voles (Diá z de la Guardia et al, 1979;Modi, 1992;Zima and Macholá n, 1995). Variation in the size of the sex chromosomes has also been reported between some species of the Palaearctic genus Apodemus (Engel et al, 1973;Saitoh and Obara, 1986;Obara et al, 1997;Reutter et al, 2001).…”

mentioning

confidence: 99%

Sex-chromosome heterochromatin variation in the wood mouse, <i>Apodemus sylvaticus</i>

Nová

Reutter

Rábová

et al. 2002

Cytogenet Genome Res

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Variation in heterochromatin content, as revealed by G- and C-banding, was studied in the sex chromosomes of the wood mouse, Apodemus sylvaticus. The sex-chromosome heterochromatin was also characterized by DAPI staining. Variation in sex chromatin was recorded in extremely large (giant) sex chromosomes in certain individuals and populations. In some individuals, the Y chromosome was the largest element of the complement. Different variants of both the X and Y chromosomes were found within a single population. The variation is therefore a type of population polymorphism and should not be used for taxonomic discrimination.

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“…According to the results of analysis of G-stained karyotypes, the X chromosomes of pygmy wood mice from different localities was 2 to 2.5-fold larger in size than the Y chromosome [7,15]. Because of the expected sex variation in genome size, the data on males and females were analyzed separately.…”

Section: Methodsmentioning

confidence: 99%

Variability in Size of the Nuclear Genome in Pygmy Wood Mouse Sylvaemus uralensis (Rodentia, Muridae)

Bogdanov

Rozanov

2005

Russ J Genet

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Earlier, in an integral genetic study, the Asian and European races were distinguished within the species Sylvaemus uralensis (pygmy wood mouse) and the European race was divided into the East European and South European forms. Each of these groups differed from the others, in particular, in the quantity of the centromeric heterochromatin in karyotypes of the animals. To establish the pattern of its changes in S. uralensis, in the present study the DNA content in splenocyte nuclei in all races and forms of pygmy wood mice was assessed using DNA flow cytometry. The heterochromatin amount in karyotypes and genome size were shown to be correlated. The East European chromosomal race of S. uralensis (Central Chernozem and Non-Chernozem regions of Russia, Crimea Peninsula, Middle Volga region, and Southern Ural) and the Asian race of this species (East Kazakhstan, Uzbekistan, and East Turkmenistan), which have respectively the highest and the lowest amounts of centromeric heterochromatin in the karyotype, exhibit the greatest difference in the DNA content in the genome. On average, the difference is approximately 8% in males and 6.7% in females; in both cases, the ranges of variability were distinctly different. Against the general background of the trait variation, the Asian race, whose members have the smallest DNA amount in their cells, looks homogeneous. The genome of the South European chromosomal form of S. uralensis (Caucasus, Transcaucasia, Carpathians, and Balkan Peninsula), which exhibits an intermediate content of the centromeric heterochromatin in the karyotype, is smaller that the genome of the East European race (by 3.2% in the group of males and by 1.9%, in the group of females), but larger than that of the Asian race (by 5% in either sex). Thus, the variability of size of centromeric C-blocks in pygmy wood mouse is likely to be associated with elimination (or, conversely, an increase in the amount) of the genetically inert chromatin. It is suggested that a significant contribution to the variability of genome size in S. uralensis is made by heterochromosomes, or, more precisely, their variable regions, which seem to be largely heterochromatic. ANIMAL GENETICS

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Karyotypic variation between wood mouse species: banded chromosomes of Apodemus alpicola and A. microps

Cited by 7 publications

References 0 publications

Karyotypic Evolution of Apodemus (Muridae, Rodentia) Inferred from Comparative FISH Analyses

Karyotypic Evolution of Apodemus (Muridae, Rodentia) Inferred from Comparative FISH Analyses

Sex-chromosome heterochromatin variation in the wood mouse, <i>Apodemus sylvaticus</i>

Variability in Size of the Nuclear Genome in Pygmy Wood Mouse Sylvaemus uralensis (Rodentia, Muridae)

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