| Literature DB >> 18622034 |
Dal-Hoe Koo1, Sung-Hwan Jo, Jae-Wook Bang, Hye-Mi Park, Sanghyeob Lee, Doil Choi.
Abstract
We report the integration of the linkage map of tomato chromosome 2 with a high-density bacterial artificial chromosome fluorescence in situ hybridization (BAC-FISH)-based cytogenetic map. The euchromatic block of chromosome 2 resides between 13 and 142 cM and has a physical length of 48.12 microm, with 1 microm equivalent to 540 kb. BAC-FISH resolved a pair of loci that were 3.7-3.9 Mb apart and were not resolved on the linkage map. Most of the regions had crossover densities close to the mean of approximately 200 kb/cM. Relatively hot and cold spots of recombination were unevenly distributed along the chromosome. The distribution of centimorgan/micrometer values was similar to the previously reported recombination nodule distribution along the pachytene chromosome. FISH-based physical maps will play an important role in advanced genomics research for tomato, including map-based cloning of agronomically important traits and whole-genome sequencing.Entities:
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Year: 2008 PMID: 18622034 PMCID: PMC2475727 DOI: 10.1534/genetics.108.089532
Source DB: PubMed Journal: Genetics ISSN: 0016-6731 Impact factor: 4.562