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doi:10.1534/genetics.106.056481
A more recent version of this article appeared on June 1, 2006.
REGULAR RESEARCH PAPERS |
High-resolution radiation hybrid map of wheat chromosome 1D
Venu Kalavacharla 1, Khwaja G Hossain 2, Yong Gu 3, Oscar Riera-Lizarazu 4, M. Isabel Vales 4, Suresh Bhamidimarri 2, Jose L. Gonzalez-Hernandez 2, Schivcharan S. Maan 2 and Shahryar F. Kianian 2*
1 Drexel University
2 North Dakota State University
3 USDA-ARS, WRRC
4 Oregon State University
* To whom correspondence should be addressed. E-mail: s.kianian{at}ndsu.nodak.edu.
Submitted on January 29, 2006
Revised on March 15, 2006
Accepted on 5 April 2006
Physical mapping methods that do not rely on meiotic recombination are necessary for complex polyploid genomes like wheat (Triticum aestivum L.). This need is due to the uneven distribution of recombination and significant variation in genetic to physical distance ratios. One method that has proven valuable in a number of non-plant and plant systems is radiation hybrid (RH) mapping. This work presents, for the first time, a high-resolution radiation hybrid map of wheat chromosome 1D (D-genome) in a tetraploid durum wheat (Triticum turgidum L., AB genomes) background. A RH panel of 87 lines was used to map 378 molecular markers which detected 2,312 chromosome breaks. The total map distance ranged from ~3,341 cR35,000 for five major linkage groups to 11,773 cR35,000 for a comprehensive map. The mapping resolution was estimated to be ~199 Kb/break and provided the starting point for BAC contig alignment. To date, this is the highest resolution that has been obtained by plant RH mapping and serves as a first step for the development of RH resources in wheat.
Key Words: Physical mapping, Plant, Radiation hybrid map, Wheat
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