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Title 

Integration of cytogenetic and genetic linkage maps unveils the physical architecture of tomato chromosome 2

Authors 

Dal Hoe KooSung-Hwan JoJ W BangH M ParkSanghyeob LeeD Choi

Publisher 

Genetics Society of America

Issue Date 

2008

Citation 

Genetics, vol. 179, no. 3, pp. 1211-1220

Keywords 

bacterial artificial chromosomechromosome mapcytogeneticsgeneticsplant chromosometomatochromosome mappingchromosomes, artificial, bacterialchromosomesplant

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 μm, with 1 μm 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 ∼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.

ISSN 

0016-6731

Link 

http://dx.doi.org/10.1534/genetics.108.089532

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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