1 Division of Population Genetics, National Institute of Genetics, Research Organization of Information and Sytems, 1111 Yata, Mishima, Shizuoka, 411-8540, Japan 2 Department of Genetics, School of Life Sciences, Graduate University of Advanced Studies, 1111 Yata, Mishima, Shizuoka, 411-8540, Japan 3 Current Address: VALWAY Technology Center, NEC Soft, Ltd.,1-18-6 Shinkiba, Koto-ku, Tokyo, 136-...