Guide to medaka color genetics, crossbreeding basics, and strain fixing. Understand dominant and recessive traits to create desired varieties.
要点总结
Guide to medaka color genetics, crossbreeding basics, and strain fixing. Understand dominant and recessive traits to create desired varieties.
Understanding color genetics allows you to plan medaka (Japanese rice fish) breeding systematically. Learning the basics of crossbreeding is one of the great joys for medaka enthusiasts.
Medaka body color is determined by combinations of several chromatophore types:
Major Color Inheritance Patterns - Himedaka (orange): Reduced melanophores. Recessive to wild-type - White medaka: Deficient xanthophores. Recessive inheritance - Youkihi (vermillion-red): Enhanced xanthophores. Polygenic inheritance - Miyuki (reflective): Iridophores concentrated on the dorsal surface. Polygenic inheritance
Crossbreeding example: Wild-type x Himedaka 1. Parents: Wild-type (BB) x Himedaka (bb) 2. F1 generation: All Bb (appear wild-type but carry the himedaka gene) 3. F1 x F1 yields F2 generation: 75% wild-type, 25% himedaka
One in four F2 offspring will express the recessive trait — this is the fundamental pattern.
Creating Tricolor Medaka - Start with vermillion-red x white medaka lines - Select individuals with red, white, and black coloring from the F2 generation onward
Enhancing Lame (Glitter) Varieties - Selectively breed individuals with the most glitter, building intensity over generations
Strengthening Miyuki Body Shine - Selectively breed full-body shine individuals - Raising at higher temperatures (28–30°C) promotes shine extension
To prevent inbreeding weakness, periodically introduce unrelated individuals of the same variety.
See also our Medaka Outdoor Pond Guide.
Bri-Choku features high-quality medaka bred by passionate hobbyists. Browse the medaka category to find broodstock candidates with clear lineage.
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