Sex-Linkage of the Black Caudal-Peduncle and Red Tail Genes in the Tuxedo Strain of the Guppy, Poecilia reticulata(Genetics)

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概要

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• Two color patterns of the Tuxedo guppy strain commercially cultured in Singapore were subjected to genetic analyses. Gene control of the black caudal-peduncle and red tail color patterns was elucidated by reciprocal crosses between the Tuxedo (TUX) strain and wild-type (WT) stock. F_1 progenies were produced by single-pair crossing between TUX and WT, 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 phenotypes and sex, and tested by chi-square analyses. Both color patterns show single gene inheritance, and are dominantly expressed in both sexes, sex-linked and determined by different loci on the X- and Y-chromosomes. Alleles for the black caudal-peduncle (Bcp) and red tail (Rdt) loci, are dominant over that of the wild-type, Bcp^+ and Rdt^+, which do not display these color patterns. The typical genotypes for TUX guppies are proposed to be X_<Bcp,Rdf>Y_<Bcp,Rdt> for males and X_<Bcp,Rdt>X_<Bcp,Rdt> for females. Heterozygous TUX males have the X_<Bcp,Rdt>Y_<Bcp>^+_<,Rdt>, X_<Bcp,Rdt>Y_<Bcp>^+_<Rdt>^+ and X_<Bcp,Rdt>Y_<Bcp,Rdt>^+ genotypes while the females are X_<Bcp,Rdt>X_<Bcp>^+_<,Rdt>. The segregation and inheritance of the Bcp and Rdt genes are illustrated by genetic models. Map distances estimated from F_1 and F_2 recombinants are approximately 3.4, 5.1 and 2.4 map units for the sex-determining region (SdR)-Rdt, SdR-Bcp and Rdt-Bcp, respectively. The gene map order is hypothesized to be SdR-Rdt-Bcp.

• 社団法人日本動物学会の論文
• 1999-08-15

著者

• KHOO Gideon

  Department of Biological Sciences, National University of Singapore

• CHAN Woon-Khiong

  Department of Biological Sciences, National University of Singapore

• LIM Tit

  Department of Biological Sciences, National University of Singapore

• PHANG Violet

  Department of Biological Sciences, National University of Singapore

• Lim T

  Department Of Biological Sciences National University Of Singapore

• Khoo G

  Department Of Biological Sciences National University Of Singapore

• Khoo Gideon

  Department Of Biological Sciences Faculty Of Science National University Of Singapore

• Phang V

  Department Of Biological Sciences National University Of Singapore

• Phang Violet

  Department Of Biological Sciences Faculty Of Science National University Of Singapore

• Lim Tit

  Department Of Biological Sciences National University Of Singapore

• Chan Woon-khiong

  Department Of Biological Sciences National University Of Singapore

関連論文

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• Genetic Diversity Within and Among Feral Populations and Domesticated Strains of the Guppy (Poecilia reticulata) in Singapore
• Cloning and Tissue Expression of 6-Pyruvoyl Tetrahydropterin Synthase and Xanthine Dehydrogenase from Poecilia reticulata
• 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)
• Inheritance of the Color Patterns of the Blue Snakeskin and Red Snakeskin Varieties of the Guppy, Poecilia reticulata : Genetics
• Interaction between the Autosomal Recessive bar Gene and the Y-Linked Snakeskin Body (Ssb) Pattern Gene in the Guppy, Poecilia reticulata(Genetics)
• Inheritance of RAPD Markers in the Guppy Fish, Poecilia reticulata
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