A Detailed Linkage Map of Medaka, Oryzias latipes: Comparative Genomics and Genome Evolution

Author:

Naruse Kiyoshi1,Fukamachi Shoji1,Mitani Hiroshi12,Kondo Mariko1,Matsuoka Tomoko1,Kondo Shu1,Hanamura Nana1,Morita Yutaka1,Hasegawa Kazuhito1,Nishigaki Reiko1,Shimada Atsuko1,Wada Hironori3,Kusakabe Takehiro4,Suzuki Norio4,Kinoshita Masato5,Kanamori Akira6,Terado Tokio7,Kimura Hiroshi7,Nonaka Masaru1,Shima Akihiro12

Affiliation:

1. Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan

2. Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan

3. Laboratory of Developmental Gene Regulation, Brain Science Institutes, RIKEN, Wako-shi, Saitama 351-0198, Japan

4. Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan

5. Department of Fisheries, Faculty of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan

6. National Research Institute of Aquaculture, Tamaki, Mie 519-0423, Japan

7. Department of Experimental Radiology, Shiga University of Medical Science, Ohtsu-shi, Shiga 520-2192, Japan

Abstract

Abstract We mapped 633 markers (488 AFLPs, 28 RAPDs, 34 IRSs, 75 ESTs, 4 STSs, and 4 phenotypic markers) for the Medaka Oryzias latipes, a teleost fish of the order Beloniformes. Linkage was determined using a reference typing DNA panel from 39 cell lines derived from backcross progeny. This panel provided unlimited DNA for the accumulation of mapping data. The total map length of Medaka was 1354.5 cM and 24 linkage groups were detected, corresponding to the haploid chromosome number of the organism. Thirteen to 49 markers for each linkage group were obtained. Conserved synteny between Medaka and zebrafish was observed for 2 independent linkage groups. Unlike zebrafish, however, the Medaka linkage map showed obvious restriction of recombination on the linkage group containing the male-determining region (Y) locus compared to the autosomal chromosomes.

Publisher

Oxford University Press (OUP)

Subject

Genetics

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