New developments in vertebrate cytotaxonomy IX Chromosome numbers in the order Insectivora (Mammalia)

Reumer, J.W.F.; Meylan, A

doi:10.1007/bf00123583

Cited by 35 publications

(25 citation statements)

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“…with some populations showing different diploid and fundamental numbers than other populations, especially in the common B. brevicauda (Meylan, 1967;Genoways et al. 1977: Reumer andMeylan, 1986). However, the causes and extent of Supported by a COSEN fellowship (to J.L.C.…”

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confidence: 99%

Robertsonian chromosomal rearrangements in the short-tailed shrew, Blarina carolinensis, in western Tennessee

Qumsiyeh

Coate

Peppers

et al. 1997

Cytogenet Genome Res

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We report significant heterozygosity for numerous Robertsonian translocations in the southern short-tailed shrew (Blarina carolinensis) in western Tennessee. Eight Robertsonian rearrangements were documented using G-banding techniques that explain the variability in diploid numbers from 46 throughout most of the range of the species to 34–40 in western Tennessee. These fusions resulted in the loss of telomere sequences and were not associated with nucleolar organizer regions. When heterozygocity is considered, the lowest diploid number possibly present would be 30. Four localities with distances of over 180 km apart were sampled, and 80–90% of the collected animals were heterozygous for at least one rearrangement. No putative parental type was found in western Tennessee. Heterozygosity for the same rearrangements was found in these different localities, and no monobrachial fusions were noted. Thus, this is a very wide hybrid zone with rare or absent parental types in the areas sampled or is an evolutionary stage preceding establishment of Robertsonian races. Selective forces, if any, were minimal, as evidenced by the wide area of polymorphism, significant heterozygosity, and the fact that the Robertsonian translocations were in Hardy-Weinberg equilibrium. The origin of such extensive polymorphism in western Tennessee is discussed, especially in light of putative effects of the New Madrid seismic activity. Similarities and differences are noted between the Blαrinα model and the well-documented variation in the European common shrew (Sorex αrαneus) and Mus musculus groups.

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confidence: 99%

Robertsonian chromosomal rearrangements in the short-tailed shrew, Blarina carolinensis, in western Tennessee

Qumsiyeh

Coate

Peppers

et al. 1997

Cytogenet Genome Res

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“…In fact, this karyotype is known not only from C. suaveolens (Catzeflis et al 1985;Grafodatsky et al 1988;Meylan 1966;Meylan and Hausser 1974;Reumer and Meylan 1986), but also from related forms such as Gueldenstaedt's shrew (C. gueldenstaedtii- Catzeflis et al 1985;Grafodatsky et al 1988) and C. sibirica (Grafodatsky et al 1988) that may both be assigned to C. suaveolens . Moreover, C. shantungensis has the same karyotype (Iwasa et al 2001).…”

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confidence: 99%

Cytogenetic and Molecular Relationships between Zarudny'S Rock Shrew (Crocidura zarudnyi; Mammalia: Soricomorpha) and Eurasian Taxa

2007

Journal of Mammalogy

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We karyotyped and sequenced 1,140 base pairs of the mitochondrial DNA cytochrome b of a specimen of Zarudny's rock shrew (Crocidura zarudnyi) from Baluchestan, southeastern Iran, to clarify its cytogenetic and molecular relationships with other Eurasian species of Crocidura. According to the karyotype (2N ¼ 40, FN ¼ 50), Zarudny's rock shrew belongs to the group of the lesser white-toothed shrew (C. suaveolens), which is different from other known crocidurine karyotypes, considering the combination of the diploid and fundamental number of chromosomes. Molecular results revealed that C. zarudnyi is included in a monophyletic clade with the C. suaveolens group, where it is a sister taxon to the others (mean Kimura 2-parameter distance ¼ 9.7%).

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“…In the Talpidae, the diploid number ranges in 23 species from 2n ¼ 32248 (Tsuchiya 1985;Reumer and Meylan 1986;Aniskyn and Romanov 1990;Yates and Moore 1990;Kawada et al 2002b). According to Kawada et al (2002b), most of the species have 34 or 36 chromosomes in their karyotypes.…”

Section: Article In Pressmentioning

confidence: 98%

Karyological study of Nasillus gracilis (Insectivora, Talpidae, Uropsilinae)

Kawada

Wang

et al. 2006

Mammalian Biology

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New developments in vertebrate cytotaxonomy IX Chromosome numbers in the order Insectivora (Mammalia)

Cited by 35 publications

References 113 publications

Robertsonian chromosomal rearrangements in the short-tailed shrew, <i>Blarina carolinensi</i><i>s</i>, in western Tennessee

Robertsonian chromosomal rearrangements in the short-tailed shrew, <i>Blarina carolinensi</i><i>s</i>, in western Tennessee

Cytogenetic and Molecular Relationships between Zarudny'S Rock Shrew (Crocidura zarudnyi; Mammalia: Soricomorpha) and Eurasian Taxa

Karyological study of Nasillus gracilis (Insectivora, Talpidae, Uropsilinae)

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