Document Detail


Molecular detection of hybridization between sympatric kangaroo species in south-eastern Australia.
MedLine Citation:
PMID:  19812615     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Introgressive hybridization has traditionally been regarded as rare in many vertebrate groups, including mammals. Despite a propensity to hybridize in captivity, introgression has rarely been reported between wild sympatric macropodid marsupials. Here we investigate sympatric populations of western (Macropus fuliginosus) and eastern (Macropus giganteus) grey kangaroos through 12 autosomal microsatellite loci and 626 bp of the hypervariable mitochondrial DNA (mtDNA) control region. M. fuliginosus and M. giganteus within the region of sympatry corresponded, both genetically and morphologically, to their respective species elsewhere in their distributions. Of the 223 grey kangaroos examined, 7.6% displayed evidence of introgression, although no F1 hybrids were detected. In contrast to captive studies, there was no evidence for unidirectional hybridization in sympatric grey kangaroos. However, a higher portion of M. giganteus backcrosses existed within the sample compared with M. fuliginosus. Hybridization in grey kangaroos is reflective of occasional breakdowns in species boundaries, occurring throughout the region and potentially associated with variable conditions and dramatic reductions in densities. Such rare hybridization events allow populations to incorporate novel diversity while still retaining species integrity.
Authors:
L E Neaves; K R Zenger; D W Cooper; M D B Eldridge
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-10-07
Journal Detail:
Title:  Heredity     Volume:  104     ISSN:  1365-2540     ISO Abbreviation:  Heredity     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-04-21     Completed Date:  2010-07-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0373007     Medline TA:  Heredity     Country:  England    
Other Details:
Languages:  eng     Pagination:  502-12     Citation Subset:  IM    
Affiliation:
Department of Biological Sciences, Macquarie University, North Ryde, New South Wales, Australia. lneaves@gmail.com
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MeSH Terms
Descriptor/Qualifier:
Animals
Chimera / genetics*
Crosses, Genetic
DNA, Mitochondrial / genetics*
Genetic Loci / genetics*
Macropodidae / genetics*
Microsatellite Repeats / genetics*
Species Specificity
Chemical
Reg. No./Substance:
0/DNA, Mitochondrial

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


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