A taxonomical re-evaluation of the Valais chromosome race of the common shrew Sorex araneus [Insectivora: Soricidae]

• Autorzy: Brunner H. , Lugon-Moulin N. , Balloux F. , Fumagalli L. , Hausser J.
• Języki publikacji: EN

Abstrakty

EN

The common shrew Sorex araneus Linnaeus, 1758 is subject to intense chromo­somal polymorphism. About 65 chromosome races are presently known. One of these chromosome races (the Valais race) is karyologically, morphologically, biochemically, and genetically clearly distinct from all other chromosome races of the species. Recent studies of hybrid zones between the Valais race and other chromosome races in the Swiss and French Alps add further strong evidence for the specific taxonomic status of the Valais race. Chromosomes and diagnostic protein markers reveal sharp frequency clines and strong heterozygote deficits. In one hybrid zone, the maintenance of the strong genetic differentiation of the hybridizing taxa was confirmed by a study with autosomal microsatellites indicating minimal gene flow. A microsatellite marker on the Y-chromosome showed complete absence of male mediated gene flow suggesting hybrid male sterility. To clarify the taxonomic status of this taxon, additional analyses were conducted. A morphometric analysis of the mandible indicated the Valais race is morphologically as distinct from neighbouring chromosome races of S. araneus as from other related Sorex species. In a phylogeny based on complete mitochondrial DNA cytochrome b gene sequences, the Valais race clearly appears as the sister taxon to all other races of S. araneus. Therefore, the chromosome race Valais of S. araneus herein is elevated to specific status and the name Sorex antinorii Bonaparte, 1840 is applied.

Słowa kluczowe

EN

Sorex arunchi; shrew; speciation; Sorex araneus; Soricidae; morphometry; Sorex samniticus; Sorex coronatus; cytochrome b gene; hybrid zone; Insectivora

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 2002
• Tom: 47
• Numer: 3
• Opis fizyczny: p.245-275,fig.,ref.

Twórcy

autor

Brunner H.

• Universite de Lausanne, CH-1015 Lausanne, Switzerland

autor

Lugon-Moulin N.

autor

Balloux F.

autor

Fumagalli L.

autor

Hausser J.

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