Linkage Analysis and Mapping of Three Sex-Linked Color Pattern Genes in the Guppy, Poecilia reticulata(Genetics)
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概要
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Three phenotypic color pattern genes of the guppy (Poecilia reticulata), i. e., black caudalpeduncle (Bcp), red tail (Rdt) and variegated tail patterning (Var), were genetically analyzed and mapped. Crosses between the Tuxedo (TUX) and Green Variegated (GV) guppy strains commercially cultured in Singapore were used to determine the gene control of these color patterns. F_1 progenies were produced by single-pair reciprocal crossing between TUX and GV, while the F_2 generation was obtained from full-sib mating between F_1 males and females. F_1 and F_2 data were segregated according to color phenotypes and sex, and tested by chi-square analyses. The Bcp, Rdt and Var color pattern genes, located at different loci on the X- and Y-chromosomes, showed single gene inheritance and dominant expression in both sexes. Their corresponding recessive alleles, Bcp^+, Rdt^+ and Var^+, do not produce any color patterns. Genotypes of Tuxedo males are proposed to be X_<Bcp,Rdt,Var>^+Y_<Bcp,Rdt,Var>^+ (type I), X_<Bcp>^+,_<Rdt,Var>^+Y_<Bcp,Rdt,Var>^+ (type II) and X_<Bcp,Rdt,Var>^+Y_<Bcp>^+_<,Rdt,var>^+ (type III) while females are X_<Bcp,Rdt,Var>^+X_<Bcp,Rdt,Var>^+. Green Variegated males and females have the X_<Bcp>^+_<,Rdt>^+_<Var>Y_<Bcp>^+_<,Rdt>^+_<,Var> and X<Bcp>^+_<,Rdt>^+_<Var>X<Bcp>^+_<,Rdt>^+_<Var> genotypes, respectively. Close linkages of 3.1, 2.3 and 2.2 map units were estimated for the sex-determining region (SdR)-Rdt, Rdt-Bcp, and SdR-Vargene pairs, respectively, while Bcp was approximately 5.1 map units from the SdR. The phenotypic map order of the guppy Y-chromosome is inferred to be Var-SdR-Rdt-Bcp.
- 社団法人日本動物学会の論文
- 1999-12-15
著者
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KHOO Gideon
Department of Biological Sciences, National University of Singapore
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CHAN Woon-Khiong
Department of Biological Sciences, National University of Singapore
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LIM Tit
Department of Biological Sciences, National University of Singapore
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PHANG Violet
Department of Biological Sciences, National University of Singapore
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Lim T
Department Of Biological Sciences National University Of Singapore
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Khoo G
Department Of Biological Sciences National University Of Singapore
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Khoo Gideon
Department Of Biological Sciences Faculty Of Science National University Of Singapore
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Phang V
Department Of Biological Sciences National University Of Singapore
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Phang Violet
Department Of Biological Sciences Faculty Of Science National University Of Singapore
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Lim Tit
Department Of Biological Sciences National University Of Singapore
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Chan Woon-khiong
Department Of Biological Sciences National University Of Singapore
関連論文
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- Linkage Analysis and Mapping of Three Sex-Linked Color Pattern Genes in the Guppy, Poecilia reticulata(Genetics)
- Sex-Linkage of the Black Caudal-Peduncle and Red Tail Genes in the Tuxedo Strain of the Guppy, Poecilia reticulata(Genetics)
- Genetic Basis of the Variegated Tail Pattern in the Guppy, Poecilia reticulata(Genetics)
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