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A physical map with yeast artificial chromosome (YAC) clones covering 63% of the 12 rice chromosomes. 2001

S Saji, and Y Umehara, and B A Antonio, and H Yamane, and H Tanoue, and T Baba, and H Aoki, and N Ishige, and J Wu, and K Koike, and T Matsumoto, and T Sasaki
Rice Genome Research Program, Institute of the Society for Techno-innovation of Agriculture, Forestry and Fisheries, Ibaraki, Japan.

A new YAC (yeast artificial chromosome) physical map of the 12 rice chromosomes was constructed utilizing the latest molecular linkage map. The 1439 DNA markers on the rice genetic map selected a total of 1892 YACs from a YAC library. A total of 675 distinct YACs were assigned to specific chromosomal locations. In all chromosomes, 297 YAC contigs and 142 YAC islands were formed. The total physical length of these contigs and islands was estimated to 270 Mb which corresponds to approximately 63% of the entire rice genome (430 Mb). Because the physical length of each YAC contig has been measured, we could then estimate the physical distance between genetic markers more precisely than previously. In the course of constructing the new physical map, the DNA markers mapped at 0.0-cM intervals were ordered accurately and the presence of potentially duplicated regions among the chromosomes was detected. The physical map combined with the genetic map will form the basis for elucidation of the rice genome structure, map-based cloning of agronomically important genes, and genome sequencing.

UI MeSH Term Description Entries
D002875 Chromosomes In a prokaryotic cell or in the nucleus of a eukaryotic cell, a structure consisting of or containing DNA which carries the genetic information essential to the cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed) Chromosome
D012275 Oryza A genus of grass family (Poaceae) that include several rice species. Oryza sativa,Rice,Rices
D017343 Genes, Plant The functional hereditary units of PLANTS. Plant Genes,Gene, Plant,Plant Gene
D018244 Chromosomes, Artificial, Yeast Chromosomes in which fragments of exogenous DNA ranging in length up to several hundred kilobase pairs have been cloned into yeast through ligation to vector sequences. These artificial chromosomes are used extensively in molecular biology for the construction of comprehensive genomic libraries of higher organisms. Artificial Chromosomes, Yeast,Yeast Artificial Chromosomes,Chromosomes, Yeast Artificial,YAC (Chromosome),YACs (Chromosomes),Artificial Chromosome, Yeast,Chromosome, Yeast Artificial,Yeast Artificial Chromosome
D020161 Physical Chromosome Mapping Mapping of the linear order of genes on a chromosome with units indicating their distances by using methods other than genetic recombination. These methods include nucleotide sequencing, overlapping deletions in polytene chromosomes, and electron micrography of heteroduplex DNA. (From King & Stansfield, A Dictionary of Genetics, 5th ed) Chromosome Mapping, Physical,Physical Mapping (Genetics),Chromosome Mappings, Physical,Mapping, Physical Chromosome,Mappings, Physical Chromosome,Physical Chromosome Mappings,Physical Mappings (Genetics)

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