Document Detail

Cross-species chromosome painting unveils cytogenetic signatures for the Eulipotyphla and evidence for the polyphyly of Insectivora.
MedLine Citation:
PMID:  16544189     Owner:  NLM     Status:  MEDLINE    
Insectivore-like animals are traditionally believed among the first eutherian mammals that have appeared on the earth. The modern insectivores are thus crucial for understanding the systematics and phylogeny of eutherian mammals as a whole. Here cross-species chromosome painting, with probes derived from flow-sorted chromosomes of human, was used to delimit the homologous chromosomal segments in two Soricidae species, the common shrew (Sorex araneus, 2n = 20/21), and Asiatic short-tailed shrew (Blarinella griselda, 2n = 44), and one Erinaceidae species, the shrew-hedgehog (Neotetracus sinensis, 2n = 32), and human. We report herewith the first comparative maps for the Asiatic short-tailed shrew and the shrew-hedgehog, in addition to a refined comparative map for the common shrew. In total, the 22 human autosomal paints detected 40, 51 and 58 evolutionarily conserved segments in the genomes of common shrew, Asiatic short-tailed shrew, and shrew-hedgehog, respectively, demonstrating that the common shrew has retained a conserved genome organization while the Asiatic short-tailed shrew and shrew-hedgehog have relatively rearranged genomes. In addition to confirming the existence of such ancestral human segmental combinations as HSA 3/21, 12/22, 14/15 and 7/16 that are shared by most eutherian mammals, our study reveals a shared human segmental combination, HSA 4/20, that could phylogenetically unite the Eulipotyphlan (i.e., the core insectivores) species. Our results provide cytogenetic evidence for the polyphyly of the order Insectivora and additional data for the eventual reconstruction of the ancestral eutherian karyotype.
Jianping Ye; Larisa Biltueva; Ling Huang; Wenhui Nie; Jinhuan Wang; Meidong Jing; Weiting Su; Nadezhda V Vorobieva; Xuelong Jiang; Alexander S Graphodatsky; Fengtang Yang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-03-17
Journal Detail:
Title:  Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology     Volume:  14     ISSN:  0967-3849     ISO Abbreviation:  Chromosome Res.     Publication Date:  2006  
Date Detail:
Created Date:  2006-03-17     Completed Date:  2006-08-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9313452     Medline TA:  Chromosome Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  151-9     Citation Subset:  IM    
Key Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, Yunnan, 650223, PR China.
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MeSH Terms
Cell Line
Chromosome Painting / methods*
Chromosomes, Human / genetics
Evolution, Molecular
Fibroblasts / cytology,  metabolism
Hedgehogs / genetics
In Situ Hybridization, Fluorescence
Insectivora / genetics*
Shrews / genetics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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