PMID- 15284882 OWN - NLM STAT- MEDLINE DCOM- 20050207 LR - 20231213 IS - 0831-2796 (Print) IS - 0831-2796 (Linking) VI - 47 IP - 4 DP - 2004 Aug TI - Segmental duplications within the Glycine max genome revealed by fluorescence in situ hybridization of bacterial artificial chromosomes. PG - 764-8 AB - Soybean (Glycine max L. Merr.) is presumed to be an ancient polyploid based on chromosome number and multiple RFLP fragments in genetic mapping. Direct cytogenetic observation of duplicated regions within the soybean genome has not heretofore been reported. Employing fluorescence in situ hybridization (FISH) of genetically anchored bacterial artificial chromosomes (BACs) in soybean, we were able to observe that the distal ends of molecular linkage group E had duplicated regions on linkage groups A2 and B2. Further, using fiber-FISH, it was possible to measure the molecular size and organization of one of the duplicated regions. As FISH did not require repetitive DNA for blocking fluorescence signals, we assume that the 200-kb genome region is relatively low in repetitive sequences. This observation, along with the observation that the BACs are located in distal euchromatin regions, has implications for genome structure/evolution and the approach used to sequence the soybean genome. FAU - Pagel, Janice AU - Pagel J AD - Department of Agronomy, Purdue University, 915 W. State Street, West Lafayette, IN 47907, USA. FAU - Walling, Jason G AU - Walling JG FAU - Young, Nevin D AU - Young ND FAU - Shoemaker, Randy C AU - Shoemaker RC FAU - Jackson, Scott A AU - Jackson SA LA - eng PT - Journal Article PL - Canada TA - Genome JT - Genome JID - 8704544 SB - IM MH - Biological Evolution MH - Chromosomes, Artificial, Bacterial/genetics MH - Chromosomes, Plant/genetics MH - *Gene Duplication MH - Genetic Linkage MH - *Genome, Plant MH - In Situ Hybridization, Fluorescence MH - Polymorphism, Restriction Fragment Length MH - Glycine max/*genetics EDAT- 2004/07/31 05:00 MHDA- 2005/02/08 09:00 CRDT- 2004/07/31 05:00 PHST- 2004/07/31 05:00 [pubmed] PHST- 2005/02/08 09:00 [medline] PHST- 2004/07/31 05:00 [entrez] AID - g04-025 [pii] AID - 10.1139/g04-025 [doi] PST - ppublish SO - Genome. 2004 Aug;47(4):764-8. doi: 10.1139/g04-025.