A fine physical map of the rice chromosome 4. 2002

Qiang Zhao, and Yu Zhang, and Zhukuan Cheng, and Mingsheng Chen, and Shengyue Wang, and Qi Feng, and Yucheng Huang, and Ying Li, and Yesheng Tang, and Bo Zhou, and Zhehua Chen, and Shuliang Yu, and Jingjie Zhu, and Xin Hu, and Jie Mu, and Kai Ying, and Pei Hao, and Lei Zhang, and Yiqi Lu, and Lei S Zhang, and Yilei Liu, and Zhen Yu, and Danlin Fan, and Qijun Weng, and Ling Chen, and Tingting Lu, and Xiaohui Liu, and Peixin Jia, and Tongguo Sun, and Yongrui Wu, and Yujun Zhang, and Ying Lu, and Can Li, and Rong Wang, and Haiyan Lei, and Tao Li, and Hao Hu, and Mei Wu, and Runquan Zhang, and Jianping Guan, and Jia Zhu, and Gang Fu, and Minghong Gu, and Guofan Hong, and Yongbiao Xue, and Rod Wing, and Jiming Jiang, and Bin Han
National Center for Gene Research, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200233, China.

As part of an international effort to completely sequence the rice genome, we have produced a fine bacterial artificial chromosome (BAC)-based physical map of the Oryza sativa japonica Nipponbare chromosome 4 through an integration of 114 sequenced BAC clones from a taxonomically related subspecies O. sativa indica Guangluai 4 and 182 RFLP and 407 expressed sequence tag (EST) markers with the fingerprinted data of the Nipponbare genome. The map consists of 11 contigs with a total length of 34.5 Mb covering 94% of the estimated chromosome size (36.8 Mb). BAC clones corresponding to telomeres, as well as to the centromere position, were determined by BAC-pachytene chromosome fluorescence in situ hybridization (FISH). This gave rise to an estimated length ratio of 5.13 for the long arm and 2.9 for the short arm (on the basis of the physical map), which indicates that the short arm is a highly condensed one. The FISH analysis and physical mapping also showed that the short arm and the pericentromeric region of the long arm are rich in heterochromatin, which occupied 45% of the chromosome, indicating that this chromosome is likely very difficult to sequence. To our knowledge, this map provides the first example of a rapid and reliable physical mapping on the basis of the integration of the data from two taxonomically related subspecies.

UI MeSH Term Description Entries
D011995 Recombination, Genetic Production of new arrangements of DNA by various mechanisms such as assortment and segregation, CROSSING OVER; GENE CONVERSION; GENETIC TRANSFORMATION; GENETIC CONJUGATION; GENETIC TRANSDUCTION; or mixed infection of viruses. Genetic Recombination,Recombination,Genetic Recombinations,Recombinations,Recombinations, Genetic
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
D012639 Seeds The encapsulated embryos of flowering plants. They are used as is or for animal feed because of the high content of concentrated nutrients like starches, proteins, and fats. Rapeseed, cottonseed, and sunflower seed are also produced for the oils (fats) they yield. Diaspores,Elaiosomes,Embryos, Plant,Plant Embryos,Plant Zygotes,Zygotes, Plant,Diaspore,Elaiosome,Embryo, Plant,Plant Embryo,Plant Zygote,Seed,Zygote, Plant
D017404 In Situ Hybridization, Fluorescence A type of IN SITU HYBRIDIZATION in which target sequences are stained with fluorescent dye so their location and size can be determined using fluorescence microscopy. This staining is sufficiently distinct that the hybridization signal can be seen both in metaphase spreads and in interphase nuclei. FISH Technique,Fluorescent in Situ Hybridization,Hybridization in Situ, Fluorescence,FISH Technic,Hybridization in Situ, Fluorescent,In Situ Hybridization, Fluorescent,FISH Technics,FISH Techniques,Technic, FISH,Technics, FISH,Technique, FISH,Techniques, FISH
D018744 DNA, Plant Deoxyribonucleic acid that makes up the genetic material of plants. Plant DNA
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)
D020451 Contig Mapping Overlapping of cloned or sequenced DNA to construct a continuous region of a gene, chromosome or genome. Mapping, Contig
D020732 Cytogenetic Analysis Examination of CHROMOSOMES to diagnose, classify, screen for, or manage genetic diseases and abnormalities. Following preparation of the sample, KARYOTYPING is performed and/or the specific chromosomes are analyzed. Cytogenetic Techniques,Molecular Cytogenetic Techniques,Cytogenetic Technics,Molecular Cytogenetic Technics,Analyses, Cytogenetic,Analysis, Cytogenetic,Cytogenetic Analyses,Cytogenetic Technic,Cytogenetic Technic, Molecular,Cytogenetic Technics, Molecular,Cytogenetic Technique,Cytogenetic Technique, Molecular,Cytogenetic Techniques, Molecular,Molecular Cytogenetic Technic,Molecular Cytogenetic Technique,Technic, Cytogenetic,Technic, Molecular Cytogenetic,Technics, Cytogenetic,Technics, Molecular Cytogenetic,Technique, Cytogenetic,Technique, Molecular Cytogenetic,Techniques, Cytogenetic,Techniques, Molecular Cytogenetic
D022202 Chromosomes, Artificial, Bacterial DNA constructs that are composed of, at least, a REPLICATION ORIGIN, for successful replication, propagation to and maintenance as an extra chromosome in bacteria. In addition, they can carry large amounts (about 200 kilobases) of other sequence for a variety of bioengineering purposes. Artificial Chromosomes, Bacterial,Bacterial Artificial Chromosomes,BAC (Chromosome),BACs (Chromosomes),Chromosomes, Bacterial Artificial,Artificial Chromosome, Bacterial,Bacterial Artificial Chromosome,Chromosome, Bacterial Artificial

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