| dc.description.abstract | Ranchu, an ornamental fish with diverse phenotypes, is highly valued for its economic
benefits. However, the occurrence of fry with similar phenotypes to the broodstock is low
due to incomplete evaluation of phenotypic separation. This study focused on evaluating
the desired phenotype of Ranchu and conducting experimental reproduction from two
different origins to determine the rate of desired phenotypic occurrence between Ranchu
fry and broodstock. Standards for evaluation were established and two groups of
favorable color were identified: primary (group 1) and calico color (group 2).
Experimental reproduction was carried out by crossbreeding inland fish (phenotype 1)
and imported fish (phenotype 2). Results showed a high survival rate for both phenotypes,
but the deformity rate was higher in inland fish. Phenotype 1 had a greater growth rate
than phenotype 2. Positive results included 12 different phenotypes of fry, with over 50%
similarity in shape to broodstock, as well as the appearance of new color patches. This
study provides technical measures for breeding and rearing Ranchu, diversifying
production objects, and determining criteria for desired phenotype. It also suggests
research directions in the field of artificial reproduction and may contribute to providing
fingerlings for domestic and export markets | en_US |
