Estimation of Genetic Parameters and Optimum Breeding Programme Design in Korean Flatfish Breeding Population

Olive flounder (Paralichthys olivaceus) is a vital aquaculture species in East Asia. However, few studies that estimate the genetic parameters of this species have been conducted. We estimated the genetic parameters of growth traits and designed an optimum breeding programme for this species. Herita...

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Bibliographic Details
Published in:Fishes 2022-11, Vol.7 (6), p.357
Main Authors: Dinh, Phuong Thanh N, Park, Jong-Won, Ekanayake, Waruni, Kim, Yeongkuk, Lee, Dooho, Lee, Dain, Jung, Hyo Sun, Kim, Julan, Yang, Hye-Rim, Lee, Heegun, Yoon, Sangwon, Lee, Jeong-Ho, Lee, Seung Hwan
Format: Article
Language:English
Subjects:
Animal breeding
Animal models
Aquaculture
Body weight
Breeding
breeding programme
Condition factor
Fish
Flatfishes
Flounder
full-sib family size
Genetic aspects
Genetic diversity
genetic parameters
Growth
Heritability
Marine fishes
Methods
Offspring
olive flounder
Paralichthys olivaceus
Parameters
Paternity
Physiological aspects
Polyculture (aquaculture)
Productivity
Progeny
Quantitative genetics
Statistical analysis
Statistical methods
Water temperature
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Summary:Olive flounder (Paralichthys olivaceus) is a vital aquaculture species in East Asia. However, few studies that estimate the genetic parameters of this species have been conducted. We estimated the genetic parameters of growth traits and designed an optimum breeding programme for this species. Heritability, genetic and phenotypic correlations, and breeding values were estimated for growth traits: body weight (BW), total length (TL), and condition factor (CF). A linear mixed animal model using the restricted maximum likelihood (REML) algorithm was applied to the statistical analysis of 9 traits (BW, TL, and CF at 11, 18, and 22 months of age) for a total of 54,159 animals from 7 generations. Increases of 13%, 8%, and 6.5% in BW, TL, and CF at the harvest stage were observed, respectively, after 7 generations of selection. The heritabilities of all growth traits were moderate, ranging from 0.35 to 0.46. The phenotypic and genetic correlations between BW and TL were high and positive in all three stages (0.91 and 0.92, 0.91 and 0.93, and 0.88 and 0.91). The estimated breeding values of BW and TL increased over the generations; however, the estimated breeding value of CF fluctuated. The optimum progeny number within full-sib families for an accuracy of 0.632 is suggested to be between 10 and 25. Findings indicated that a considerable response to selection and single-trait selection based on BW would be effective in olive flounder.
ISSN:2410-3888
2410-3888
DOI:10.3390/fishes7060357