PMID- 14504748 OWN - NLM STAT- MEDLINE DCOM- 20040305 LR - 20221207 IS - 0040-5752 (Print) IS - 0040-5752 (Linking) VI - 108 IP - 2 DP - 2004 Jan TI - Localization of jointless-2 gene in the centromeric region of tomato chromosome 12 based on high resolution genetic and physical mapping. PG - 190-6 AB - Abscission is a universal process whereby plants shed their organs, such as flowers, fruit and leaves. In tomato, the non-allelic mutations jointless and jointless-2 have been discovered as recessive mutations that completely suppress the formation of pedicel abscission zones. A high resolution genetic map of jointless-2 was constructed using 1,122 jointless F2 plants. Restriction fragment length polymorphism (RFLP) marker RPD140 completely co-segregated with the jointless-2 locus and mapped in a 2.4 cM interval between RFLP markers CD22 and TG618. To chromosome walk to jointless-2, all three markers were used to screen a bacterial artificial chromosome (BAC) library and contigs were developed. Intensive efforts to expand and merge the BAC contigs were unsuccessful because of the highly repetitive sequence content on the distal ends of each contig. To determine the physical distance between and the orientation of the three contigs, we used high resolution pachytene fluorescence in situ hybridization (FISH) mapping. The RPD140 contig was positioned in the centromeric region of chromosome 12 between two large pericentric heterochromatin blocks, about 50 Mb from the TG618 contig on the short arm and 10 Mb from the CD22 contig on the long arm, respectively. Based on high resolution genetic and physical mapping, we conclude that the jointless-2 gene is located within or near the chromosome 12 centromere where 1 cM is approximately 25 Mb in length. FAU - Budiman, M A AU - Budiman MA AD - Genomics Institute, Clemson University, Clemson, SC 29634, USA. FAU - Chang, S-B AU - Chang SB FAU - Lee, S AU - Lee S FAU - Yang, T J AU - Yang TJ FAU - Zhang, H-B AU - Zhang HB FAU - de Jong, H AU - de Jong H FAU - Wing, R A AU - Wing RA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20030920 PL - Germany TA - Theor Appl Genet JT - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JID - 0145600 RN - 0 (DNA, Plant) RN - 0 (Genetic Markers) RN - 0 (J protein, Lycopersicon esculentum) RN - 0 (MADS Domain Proteins) RN - 0 (Plant Proteins) SB - IM MH - Centromere/*genetics MH - Chromosome Walking MH - Chromosomes, Artificial, Bacterial MH - Chromosomes, Plant/*genetics MH - DNA, Plant/genetics MH - Genetic Markers MH - Hybridization, Genetic MH - In Situ Hybridization, Fluorescence MH - Solanum lycopersicum/*genetics MH - MADS Domain Proteins/*genetics MH - *Physical Chromosome Mapping MH - Plant Proteins/*genetics MH - Polymorphism, Restriction Fragment Length EDAT- 2003/09/25 05:00 MHDA- 2004/03/06 05:00 CRDT- 2003/09/25 05:00 PHST- 2003/04/09 00:00 [received] PHST- 2003/08/12 00:00 [accepted] PHST- 2003/09/25 05:00 [pubmed] PHST- 2004/03/06 05:00 [medline] PHST- 2003/09/25 05:00 [entrez] AID - 10.1007/s00122-003-1429-3 [doi] PST - ppublish SO - Theor Appl Genet. 2004 Jan;108(2):190-6. doi: 10.1007/s00122-003-1429-3. Epub 2003 Sep 20.