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Clustered microsatellite mutations in the pipefish Syngnathus typhle
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Animal Ecology.
1999 (English)In: Genetics, ISSN 0016-6731, E-ISSN 1943-2631, Vol. 152, no 3, 1057-1063 p.Article in journal (Refereed) Published
Abstract [en]

Clustered mutations are copies of a mutant allele that enter a population's gene pool together due to replication fi om a premeiotic germline mutation and distribution to multiple successful gametes of an individual. Although the phenomenon has been studied in Drosophila and noted in a few other species, the topic has received scant attention despite claims of being of major importance to population genetics theor). Here we capitalize upon the reproductive biology of male-pregnant pipefishes to document the occurrence of clustered microsatellite mutations and to estimate their rates and patterns from family data. Among a total of 3195 embryos genetically screened from 110 families, 40% of the 35 detected de novo mutant alleles resided in documented mutational clusters. Most of the microsatellite mutations appeared to involve small-integer changes ill repeat copy number, and they arose in approximately equal frequency in paternal and maternal germlines. These findings extend observations on clustered mutations to another organismal group and motivate a broader critique of the mutation cluster phenomenon. They also carry implications for the evolution of microsatellites with respect to mutational models and homoplasty among alleles.

Place, publisher, year, edition, pages
1999. Vol. 152, no 3, 1057-1063 p.
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-126454ISI: 000081341900021OAI: oai:DiVA.org:uu-126454DiVA: diva2:324115
Available from: 2010-06-14 Created: 2010-06-14 Last updated: 2010-08-12Bibliographically approved

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http://www.genetics.org/cgi/content/abstract/152/3/1057

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Berglund, Anders

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