- 期刊
Completion of the Rice Chromosome 5 High-Quality Draft
並列摘要
Rice (Oryza sativa) has been chosen as the first crop for genome sequencing work by an international consortium for the following reasons: (1)Rice is an important crop in the world, feeding about one half of the world's population; (2)Rice genome size, 430 Mb, is the smallest among crops; (3)Rice linkage and physical maps have been established, and many expressed sequence tags(ESTs) reported and mostly mapped. A yeast artificial chromosome (PAC) library that has been fingerprinted and ordered with mapped markers currently covers most of the rice genome. Several bacterial artificial chromosome (BAC) libraries and P1-derived artificial chromosome (PAC) libraries have also been described. (4) The transgenic technology for rice has been established, and rice has become the easiest of all cereal plants to transform genetically. (5) Rice shares a co-linear gene organization with other cereal grasses, thus rice is a key to knowledge of the genomic organization of the other grasses. The International Rice Genome Sequencing Project (IRGSP) thus started the rice genome sequencing project since 1998. This consortium, consists of publicly funded laboratories from 10 regions including Japan, the United States of America, the People's Republic of China, Taiwan, France, India, the Republic of Korea, Brazil, Thailand and United Kingdom, announced the completion of a high quality draft sequence of the rice genome at the end of 2002. Taiwan joins this consortium and performs the sequence of rice chromosome 5. The sequence data for the entire rice genome is now available in the public domain deposited in public databases, including Gen Bank, EMBL and DDBJ, for free access to all scientists worldwide. This will trigger studies that lead to further improvement of this crop. Meanwhile, it would also provide an important tool in understanding other major cereal crops such as maize, wheat, barley and sorghum.
延伸閱讀
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