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comlete separation among matrallines in a social spider infered by hapervariable mt DNA
Molecular Ecology (2010) 19, 3052–3063 doi: 10.1111/j.1365-294X.2010.04681.xComplete separation along matrilines in a social spider
metapopulation inferred from hypervariable
mitochondrial DNA regionI . AGNARSSON,*??§ W. P. MADDISON?§ and L. AVILE?S?
*Institute of Biology, Scientific Research Centre of the Slovenian Academy of Sciences and Arts, Novi trg 2, PO Box 306,
SI-1001 Ljubljana, Slovenia, ?Department of Biology, University of Puerto Rico, PO Box 23360, San Juan, PR 00931-3360,
USA, ?Department of Zoology, The University of British Columbia, 2370-6270 University Boulevard, Vancouver, BC, V6T 1Z4,
Canada, §Department of Botany, The University of British Columbia, 3529-6270 University Boulevard, Vancouver, BC, V6T
1Z4, CanadaCorresponde
E-mail: iagnaAbstract
The distribution and quantity of genetic diversity may be profoundly influenced by the
emergence and dynamics of social groups. Permanent social living in spiders has resulted
in the subdivision of their populations in more or less isolated colony lineages that grow,
proliferate and become extinct without mixing with one another. A newly discovered
hypervariable mitochondrial DNA region allowed us to examine the fine scale
metapopulation structure in the social Anelosimus eximius. We sampled 39 colonies in
Ecuador and French Guiana and identified 25 haplotypes. The majority of colonies
contained one haplotype. Additional haplotypes occurred in approximately 15% of the
colonies, and were always closely related to the common colony haplotype. Our findings
confirm that colonies consist of single matrilines, with within-colony variation explained
by mutations within the matriline. We thus found no evidence of mixing of matrilines.
Likewise, colonies in a cluster often shared a haplotype, implying common colony
ancestry. In few cases, however, haplotypes were shared between more distant colonies,
providing evidence for occasional longer distance dispersal and ?or widespread colony
lineages. The geographical loc
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