PMID- 28719910 OWN - NLM STAT- MEDLINE DCOM- 20170929 LR - 20170929 IS - 1424-859X (Electronic) IS - 1424-8581 (Linking) VI - 152 IP - 2 DP - 2017 TI - Correlating the Genetic and Physical Map of Barley Chromosome 3H Revealed Limitations of the FISH-Based Mapping of Nearby Single-Copy Probes Caused by the Dynamic Structure of Metaphase Chromosomes. PG - 90-96 LID - 10.1159/000478631 [doi] AB - Genetic maps are based on the recombination frequency of molecular markers which often show different positions in comparison to the corresponding physical maps. To decipher the position and order of DNA sequences genetically mapped to terminal and interstitial regions of barley (Hordeum vulgare) chromosome 3H, fluorescence in situ hybridization (FISH) on mitotic metaphase chromosomes was performed with 16 genomic single-copy probes derived from fingerprinted BAC contigs. Long genetic distances at subterminal regions translated into short physical distances, confirming that recombination events occur more often at distal regions of chromosome 3H. Nonoverlapping FISH signals were frequently obtained for probes with a physical distance of at least 30-60 kb. Only 8% of the analyzed chromosomes showed a symmetric order of FISH signals on both sister chromatids. Due to the dynamic packing of metaphase chromatin, the order of 2 adjacent single-copy signals along the chromosome arms outside the (peri)centromeric region can only reliably be determined if the cytological distance is approximately 3%, corresponding to 21.6 Mb. CI - (c) 2017 S. Karger AG, Basel. FAU - Bustamante, Fernanda O AU - Bustamante FO AD - Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Seeland, Germany. FAU - Aliyeva-Schnorr, Lala AU - Aliyeva-Schnorr L FAU - Fuchs, Jorg AU - Fuchs J FAU - Beier, Sebastian AU - Beier S FAU - Houben, Andreas AU - Houben A LA - eng PT - Journal Article DEP - 20170719 PL - Switzerland TA - Cytogenet Genome Res JT - Cytogenetic and genome research JID - 101142708 SB - IM MH - Base Pairing/genetics MH - Chromatids/genetics MH - Chromosome Mapping/*methods MH - Chromosomes, Plant/*genetics MH - *Gene Dosage MH - Hordeum/*genetics MH - In Situ Hybridization, Fluorescence/*methods MH - Metaphase/*genetics MH - Physical Chromosome Mapping/*methods OTO - NOTNLM OT - Chromosome structure OT - Metaphase chromosome OT - Physical mapping OT - Single-copy FISH EDAT- 2017/07/19 06:00 MHDA- 2017/09/30 06:00 CRDT- 2017/07/19 06:00 PHST- 2017/05/03 00:00 [accepted] PHST- 2017/07/19 06:00 [pubmed] PHST- 2017/09/30 06:00 [medline] PHST- 2017/07/19 06:00 [entrez] AID - 000478631 [pii] AID - 10.1159/000478631 [doi] PST - ppublish SO - Cytogenet Genome Res. 2017;152(2):90-96. doi: 10.1159/000478631. Epub 2017 Jul 19.