PMID- 21272311 OWN - NLM STAT- MEDLINE DCOM- 20110509 LR - 20211020 IS - 1471-2156 (Electronic) IS - 1471-2156 (Linking) VI - 12 DP - 2011 Jan 27 TI - An integrated molecular cytogenetic map of Cucumis sativus L. chromosome 2. PG - 18 LID - 10.1186/1471-2156-12-18 [doi] AB - BACKGROUND: Integration of molecular, genetic and cytological maps is still a challenge for most plant species. Recent progress in molecular and cytogenetic studies created a basis for developing integrated maps in cucumber (Cucumis sativus L.). RESULTS: In this study, eleven fosmid clones and three plasmids containing 45S rDNA, the centromeric satellite repeat Type III and the pericentriomeric repeat CsRP1 sequences respectively were hybridized to cucumber metaphase chromosomes to assign their cytological location on chromosome 2. Moreover, an integrated molecular cytogenetic map of cucumber chromosomes 2 was constructed by fluorescence in situ hybridization (FISH) mapping of 11 fosmid clones together with the cucumber centromere-specific Type III sequence on meiotic pachytene chromosomes. The cytogenetic map was fully integrated with genetic linkage map since each fosmid clone was anchored by a genetically mapped simple sequence repeat marker (SSR). The relationship between the genetic and physical distances along chromosome was analyzed. CONCLUSIONS: Recombination was not evenly distributed along the physical length of chromosome 2. Suppression of recombination was found in centromeric and pericentromeric regions. Our results also indicated that the molecular markers composing the linkage map for chromosome 2 provided excellent coverage of the chromosome. FAU - Han, Yonghua AU - Han Y AD - National Maize Improvement Center of China, Key Laboratory of Crop Genetic Improvement and Genome of Ministry of Agriculture, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100094, PR China. yhhan@genetics.ac.cn FAU - Zhang, Zhonghua AU - Zhang Z FAU - Huang, Sanwen AU - Huang S FAU - Jin, Weiwei AU - Jin W LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110127 PL - England TA - BMC Genet JT - BMC genetics JID - 100966978 SB - IM MH - Centromere MH - *Chromosome Mapping MH - Chromosomes, Plant MH - Cucumis sativus/*genetics MH - In Situ Hybridization, Fluorescence PMC - PMC3039625 EDAT- 2011/01/29 06:00 MHDA- 2011/05/10 06:00 PMCR- 2011/01/27 CRDT- 2011/01/29 06:00 PHST- 2010/11/27 00:00 [received] PHST- 2011/01/27 00:00 [accepted] PHST- 2011/01/29 06:00 [entrez] PHST- 2011/01/29 06:00 [pubmed] PHST- 2011/05/10 06:00 [medline] PHST- 2011/01/27 00:00 [pmc-release] AID - 1471-2156-12-18 [pii] AID - 10.1186/1471-2156-12-18 [doi] PST - epublish SO - BMC Genet. 2011 Jan 27;12:18. doi: 10.1186/1471-2156-12-18.