Abstract
Genome-wide maps of recombination sites provide valuable information not only on the recombination pathway itself but also facilitate the understanding of genome dynamics and evolution. Here, we describe a chromatin immunoprecipitation (ChIP) protocol to map the sites of recombination initiation in plants with maize used as an example. ChIP is a method that allows identification of chromosomal sites occupied by specific proteins. Our protocol utilizes RAD51, a protein involved in repair of double-strand breaks (DSBs) that initiate meiotic recombination, to identify DSB formation hotspots. Chromatin is extracted from meiotic flowers, sheared and enriched in fragments bound to RAD51. Genomic location of the protein is then identified by next-generation sequencing. This protocol can also be used in other species of plants, animals, and fungi.
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Acknowledgment
Research to develop this protocol was supported by a grant from National Science Foundation (IOS-1025881) to WPP.
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He, Y., Wang, M., Sun, Q., Pawlowski, W.P. (2016). Mapping Recombination Initiation Sites Using Chromatin Immunoprecipitation. In: Kianian, S., Kianian, P. (eds) Plant Cytogenetics. Methods in Molecular Biology, vol 1429. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-3622-9_14
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DOI: https://doi.org/10.1007/978-1-4939-3622-9_14
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