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Fine-scale variation in meiotic recombination in Mimulus inferred from population shotgun sequencing.

ABSTRACT: Meiotic recombination rates can vary widely across genomes, with hotspots of intense activity interspersed among cold regions. In yeast, hotspots tend to occur in promoter regions of genes, whereas in humans and mice, hotspots are largely defined by binding sites of the positive-regulatory domain zinc finger protein 9. To investigate the detailed recombination pattern in a flowering plant, we use shotgun resequencing of a wild population of the monkeyflower Mimulus guttatus to precisely locate over 400,000 boundaries of historic crossovers or gene conversion tracts. Their distribution defines some 13,000 hotspots of varying strengths, interspersed with cold regions of undetectably low recombination. Average recombination rates peak near starts of genes and fall off sharply, exhibiting polarity. Within genes, recombination tracts are more likely to terminate in exons than in introns. The general pattern is similar to that observed in yeast, as well as in positive-regulatory domain zinc finger protein 9-knockout mice, suggesting that recombination initiation described here in Mimulus may reflect ancient and conserved eukaryotic mechanisms.

SUBMITTER: Hellsten U

PROVIDER: S-EPMC3845195 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature

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Fine-scale variation in meiotic recombination in Mimulus inferred from population shotgun sequencing.

Hellsten Uffe U Wright Kevin M KM Jenkins Jerry J Shu Shengqiang S Yuan Yaowu Y Wessler Susan R SR Schmutz Jeremy J Willis John H JH Rokhsar Daniel S DS

Proceedings of the National Academy of Sciences of the United States of America 20131113 48

Meiotic recombination rates can vary widely across genomes, with hotspots of intense activity interspersed among cold regions. In yeast, hotspots tend to occur in promoter regions of genes, whereas in humans and mice, hotspots are largely defined by binding sites of the positive-regulatory domain zinc finger protein 9. To investigate the detailed recombination pattern in a flowering plant, we use shotgun resequencing of a wild population of the monkeyflower Mimulus guttatus to precisely locate o ...[more]

PMID: 24225854

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Dataset Information

Fine-scale variation in meiotic recombination in Mimulus inferred from population shotgun sequencing.

Publications

Fine-scale variation in meiotic recombination in Mimulus inferred from population shotgun sequencing.

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