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Accurate recombination estimation from pooled genotyping and sequencing: a case study on barley.

Authors:
Michael Schneider Federico Casale Benjamin Stich

BMC Genomics 2022 Jun 25;23(1):468. Epub 2022 Jun 25.

Institute of Quantitative Genetics and Genomics of Plants, Heinrich Heine University, 40225, Düsseldorf, Germany.

Sexual reproduction involves meiotic recombination and the creation of crossing over between homologous chromosomes, which leads to new allele combinations. We present a new approach that uses the allele frequency differences and the physical distance of neighboring polymorphisms to estimate the recombination rate from pool genotyping or sequencing. This allows a considerable cost reduction compared to conventional mapping based on genotyping or sequencing data of single individuals. We evaluated the approach based on computer simulations at various genotyping depths and population sizes as well as applied it to experimental data of 45 barley populations, comprising 4182 RIL. High correlations between the recombination rates from this new pool genetic mapping approach and conventional mapping in simulated and experimental barley populations were observed. The proposed method therefore provides a reliable genetic map position and recombination rate estimation in defined genomic windows.

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http://dx.doi.org/10.1186/s12864-022-08701-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9233355PMC
June 2022

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