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  Recombination and gene conversion in a 170-kb genomic region of Arabidopsis thaliana

Haubold, B., Kroymann, J., Ratzka, A., Mitchell-Olds, T., & Wiehe, T. (2002). Recombination and gene conversion in a 170-kb genomic region of Arabidopsis thaliana. Genetics, 161(3), 1269-1278.

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Haubold, B.1, Author           
Kroymann, J.2, Author
Ratzka, A.2, Author
Mitchell-Olds, T.2, Author
Wiehe, T.2, Author
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1External, ou_persistent22              
2external, ou_persistent22              

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 Abstract: Arabidopsis thaliana is a highly selling plant that nevertheless appears to undergo substantial recombination. To reconcile its selfing habit with the observations of recombination, we have sampled the genetic diversity of A. thaliana at 14 loci of similar to500 by each, spread across 170 kb of genomic sequence centered on a QTL for resistance to herbivory. A total of 170 of the 6321 nucleotides surveyed were polymorphic, with 169 being biallelic. The mean silent genetic diversity (pi(s)) varied between 0.001 and 0.03. Pairwise linkage disequilibria between the polymorphisms were negatively correlated with distance, although this effect vanished when only pairs of polymorphisms with four haplotypes were included in the analysis. The absence of a consistent negative correlation between distance and linkage disequilibrium indicated that gene conversion might have played an important role in distributing genetic diversity throughout the region. We tested this by coalescent simulations and estimate that up to 90% of recombination is due to gene conversion.

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 Dates: 2002-072002-07
 Publication Status: Issued
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 Identifiers: ISI: 000177192500029
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Title: Genetics
Source Genre: Journal
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Publ. Info: Genetics Society of America
Pages: - Volume / Issue: 161 (3) Sequence Number: - Start / End Page: 1269 - 1278 Identifier: ISSN: 0016-6731 (print)
ISSN: 0016-6731 (online)
ISSN: 1943-2631 (online)
CoNE: https://pure.mpg.de/cone/journals/resource/954925400554