comlete separation among matrallines in a social spider infered by hapervariable mt DNA.pdf

comlete separation among matrallines in a social spider infered by hapervariable mt DNA.pdf

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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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