Cytogenetic mapping with centromeric bacterial artificial chromosomes contigs shows that this recombination-poor region comprises more than half of barley chromosome 3H

The Plant Journal : for Cell and Molecular Biology
Lala Aliyeva-SchnorrAndreas Houben

Abstract

Genetic maps are based on the frequency of recombination and often show different positions of molecular markers in comparison to physical maps, particularly in the centromere that is generally poor in meiotic recombinations. To decipher the position and order of DNA sequences genetically mapped to the centromere of barley (Hordeum vulgare) chromosome 3H, fluorescence in situ hybridization with mitotic metaphase and meiotic pachytene chromosomes was performed with 70 genomic single-copy probes derived from 65 fingerprinted bacterial artificial chromosomes (BAC) contigs genetically assigned to this recombination cold spot. The total physical distribution of the centromeric 5.5 cM bin of 3H comprises 58% of the mitotic metaphase chromosome length. Mitotic and meiotic chromatin of this recombination-poor region is preferentially marked by a heterochromatin-typical histone mark (H3K9me2), while recombination enriched subterminal chromosome regions are enriched in euchromatin-typical histone marks (H3K4me2, H3K4me3, H3K27me3) suggesting that the meiotic recombination rate could be influenced by the chromatin landscape.

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Citations

Feb 18, 2016·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Lala Aliyeva-SchnorrAndreas Houben
Apr 28, 2017·Scientific Data·Sebastian BeierMartin Mascher
Sep 27, 2018·The Plant Journal : for Cell and Molecular Biology·Axel HimmelbachMartin Mascher
Mar 11, 2019·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Jiming Jiang
Mar 23, 2020·Cytogenetic and Genome Research·Bhanu P PotlapalliAndreas Houben
Dec 12, 2019·The Plant Journal : for Cell and Molecular Biology·Sebastian BeierThomas Schmutzer
Jul 21, 2017·The Plant Genome·Kateřina HolušováJan Bartoš
Sep 23, 2018·Genome Biology·Mona SchreiberMartin Mascher
Jun 19, 2019·Molecular Biology and Evolution·Steven DreissigStefan Heckmann

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