Volume 49, Issue 6 pp. 953-960
Free Access

Identification of Chromosomes from Multiple Rice Genomes Using a Universal Molecular Cytogenetic Marker System

Xiaomin Tang

Xiaomin Tang

State Key Laboratory of Plant Genomics and Center for Plant Gene Research, Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Beijing 100101, China

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Weidong Bao

Weidong Bao

State Key Laboratory of Plant Genomics and Center for Plant Gene Research, Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Beijing 100101, China

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Wenli Zhang

Wenli Zhang

State Key Laboratory of Plant Genomics and Center for Plant Gene Research, Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Beijing 100101, China

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Zhukuan Cheng

Corresponding Author

Zhukuan Cheng

State Key Laboratory of Plant Genomics and Center for Plant Gene Research, Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Beijing 100101, China

*Author for correspondence. Tel: +86 (0)10 6486 8726; Fax: +86 (0)10 6487 3428; E-mail: <[email protected]>.Search for more papers by this author
First published: 15 June 2007
Citations: 12

Supported by the National Natural Science Foundation of China (30325008, 30428019 and 30530070).

Publication of this paper is supported by the National Natural Science Foundation of China (30624808).

Abstract

To develop reliable techniques for chromosome identification is critical for cytogenetic research, especially for genomes with a large number and smaller-sized chromosomes. An efficient approach using bacterial artificial chromosome (BAC) clones as molecular cytological markers has been developed for many organisms. Herein, we present a set of chromosomal arm-specific molecular cytological markers derived from the gene-enriched regions of the sequenced rice genome. All these markers are able to generate very strong signals on the pachytene chromosomes of Oryza sativa L. (AA genome) when used as fluorescence in situ hybridization (FISH) probes. We further probed those markers to the pachytene chromosomes of O. punctata (BB genome) and O. officinalis (CC genome) and also got very strong signals on the relevant pachytene chromosomes. The signal position of each marker on the related chromosomes from the three different rice genomes was pretty much stable, which enabled us to identify different chromosomes among various rice genomes. We also constructed the karyotype for both O. punctata and O. officinalis with the BB and CC genomes, respectively, by analysis of 10 pachytene cells anchored by these chromosomal arm-specific markers.

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