Open AccessEstimation of genetic parameters for growth related traits at different stages of development in Paralichthys olivaceus (Temminck & Schlegel, 1846)
Author(s) -
F. Liu,
S. L. Chen,
L. Wang,
Y. P. Zhang,
Yongsheng Tian,
H. L. Chen
Publication year - 2016
Publication title -
indian journal of fisheries
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.216
H-Index - 12
ISSN - 0970-6011
DOI - 10.21077/ijf.2016.63.3.49593-09
Subject(s) - paralichthys , heritability , biology , genetic correlation , zoology , correlation , growth model , body weight , genetic variation , genetics , mathematics , endocrinology , fishery , gene , fish <actinopterygii> , geometry , mathematical economics
Genetic parameters of growth traits at different growing stages of Paralichthys olivaceus (Temminck and Schlegel, 1846) were estimated using 30 families. The estimates of heritability for body weight at four developmental stages viz., 210, 450, 720 and 830 days of age, varied from 0.12 to 0.37. The heritability at 720 days of age was the lowest and that of 450 days was the highest. The maternal effect was 0.08 at 210 days, 0.03 at 450 days and almost zero (8.89 E-8 and 2.40 E-7) at 720 and 830 days. Correlation coefficients of the estimated breeding value (EBV) and phenotypic value (PV) of body weight at different developmental stages were 0.470-0.803, which were highly significant (p<0.01). Correlation of estimated breeding value (EBV) and phenotypic value (PV) was the highest at 210 days of age and the lowest at 720 days. Genetic correlation among the four stages showed large variation (0.339-0.811), which were highly significant except that of 210 and 830 days. The value and accuracy of estimating genetic parameters for growth traits at different stages was different. Therefore, the growth stage should be taken into account when designing a breeding program for growth traits in P. olivaceus.