PMID- 19774472 OWN - NLM STAT- MEDLINE DCOM- 20100308 LR - 20211020 IS - 1573-6849 (Electronic) IS - 0967-3849 (Print) IS - 0967-3849 (Linking) VI - 17 IP - 7 DP - 2009 TI - Assignment of genetic linkage maps to diploid Solanum tuberosum pachytene chromosomes by BAC-FISH technology. PG - 899-915 LID - 10.1007/s10577-009-9077-3 [doi] AB - A cytogenetic map has been developed for diploid potato (Solanum tuberosum), in which the arms of the 12 potato bivalents can be identified in pachytene complements using multicolor fluorescence in situ hybridization (FISH) with a set of 60 genetically anchored bacterial artificial chromosome (BAC) clones from the RHPOTKEY BAC library. This diagnostic set of selected BACs (five per chromosome) hybridizes to euchromatic regions and corresponds to well-defined loci in the ultradense genetic map, and with these probes a new detailed and reliable pachytene karyotype could be established. Chromosome size has been estimated both from microscopic length measurements and from 4',6-diamidino-2-phenylindole fluorescence-based DNA content measurements. In both approaches, chromosome 1 is the largest (100-115 Mb) and chromosome 11 the smallest (49-53 Mb). Detailed measurements of mega-base-pair to micrometer ratios have been obtained for chromosome 5, with average values of 1.07 Mb/mum for euchromatin and 3.67 Mb/mum for heterochromatin. In addition, our FISH results helped to solve two discrepancies in the potato genetic map related to chromosomes 8 and 12. Finally, we discuss the significance of the potato cytogenetic map for extended FISH studies in potato and related Solanaceae, which will be especially beneficial for the potato genome-sequencing project. FAU - Tang, Xiaomin AU - Tang X AD - Wageningen UR Plant Breeding, Wageningen University and Research Center, 6708 PB, Wageningen, The Netherlands. FAU - de Boer, Jan M AU - de Boer JM FAU - van Eck, Herman J AU - van Eck HJ FAU - Bachem, Christian AU - Bachem C FAU - Visser, Richard G F AU - Visser RG FAU - de Jong, Hans AU - de Jong H LA - eng PT - Journal Article DEP - 20090923 PL - Netherlands TA - Chromosome Res JT - Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology JID - 9313452 SB - IM MH - Chromosomes, Artificial, Bacterial MH - *Chromosomes, Plant MH - Diploidy MH - *Genetic Linkage MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Solanum tuberosum/*genetics PMC - PMC2776164 EDAT- 2009/09/24 06:00 MHDA- 2010/03/10 06:00 PMCR- 2009/09/23 CRDT- 2009/09/24 06:00 PHST- 2009/04/22 00:00 [received] PHST- 2009/08/20 00:00 [accepted] PHST- 2009/09/24 06:00 [entrez] PHST- 2009/09/24 06:00 [pubmed] PHST- 2010/03/10 06:00 [medline] PHST- 2009/09/23 00:00 [pmc-release] AID - 9077 [pii] AID - 10.1007/s10577-009-9077-3 [doi] PST - ppublish SO - Chromosome Res. 2009;17(7):899-915. doi: 10.1007/s10577-009-9077-3. Epub 2009 Sep 23.