Genetic Differentiation of Oryzias minutillus in Thailand

An allozyme survey was conducted in eleven local populations ofOryzias minutillus from Thailand. The region-specific distribution of alleles and the genetic relationship among the eleven populations revealed that they represented major three population groups, within the country as a whole; the Peninsular, Mae Nam Chao Phraya and Mekong subpopulations. Because their distribution boundaries coincide with geographic features, it is supposed that their genetic differentiation is primarily due to geographic isolation. Karyotype polymorphism has been reported only from the Mae Nam Chao Phraya subpopulation, suggesting that the variant karyotype evolved after allopatric isolation of the three subpopulations.

[1]  H. Uwa,et al.  Karyotype evolution and geographical distribution of the Thai‐medaka, Oryzias minutillus, in Thailand , 1992 .

[2]  M. Kottelat.  Zoogeography of the fishes from Indochinese Inland waters with an annotated check-list , 1989 .

[3]  H. Uwa,et al.  Karyotypes and geographical distribution of ricefishes from Yunnan, southwestern China , 1988 .

[4]  H. Uwa,et al.  Karyotype Evolution and Relationship of a Small Ricefish, Oryzias minutillus, from Thailand , 1985 .

[5]  M. Sakaizumi,et al.  Allozymic Variation and Regional Differentiation in Wild Populations of the Fish Oryzias latipes , 1983 .

[6]  M. Stoneking,et al.  Genetic Evidence Suggesting Subspecific Differences between Northern and Southern Populations of Brook Trout (Salvelinus fontinalis) , 1981 .

[7]  R. B. Selander,et al.  BIOSYS-1: a FORTRAN program for the comprehensive analysis of electrophoretic data in population genetics and systematics , 1981 .

[8]  M. Sakaizumi,et al.  Allozymic Variation in Wild Populations of the Fish, Oryzias latipes , 1980 .

[9]  E Nevo,et al.  Genetic variation in natural populations: patterns and theory. , 1978, Theoretical population biology.

[10]  D. N. Raine,et al.  Handbook of Enzyme Electrophoresis in Human Genetics , 1977 .

[11]  山本 時男.  Medaka (killifish) : biology and strains , 1975 .

[12]  J. W. Clayton,et al.  Amine-Citrate Buffers for pH Control in Starch Gel Electrophoresis , 1972 .

[13]  M. Soulé.  THE VARIATION PROBLEM: THE GENE FLOW‐VARIATION HYPOTHESIS , 1971 .

[14]  R. D. Lewis,et al.  Polymorphism in the Esterases of Atlantic Herring , 1970 .