Quantitative genetic parameter estimates for body and carcass traits in a cultured stock of giant freshwater prawn (Macrobrachium rosenbergii) selected for harvest weight in Vietnam


Autoria(s): Hung, Dinh; Nguyen, Nguyen Hong; Ponzoni, Raul W.; Hurwood, David A.; Mather, Peter B.
Data(s)

10/08/2013

Resumo

We estimated the heritability and correlations between body and carcass weight traits in a cultured stock of giant freshwater prawn (GFP) (Macrobrachium rosenbergii) selected for harvest body weight in Vietnam. The data set consisted of 18,387 body and 1,730 carcass records, as well as full pedigree information collected over four generations. Variance and covariance components were estimated by restricted maximum likelihood fitting a multi-trait animal model. Across generations, estimates of heritability for body and carcass weight traits were moderate and ranged from 0.14 to 0.19 and 0.17 to 0.21, respectively. Body trait heritabilities estimated for females were significantly higher than for males whereas carcass weight trait heritabilities estimated for females and males were not significantly different (P>. 0.05). Maternal effects for body traits accounted for 4 to 5% of the total variance and were greater in females than in males. Genetic correlations among body traits were generally high in the mixed sexes. Genetic correlations between body and carcass weight traits were also high. Although some issues remain regarding the best statistical model to be fitted to GFP data, our results suggest that selection for high harvest body weight based on breeding values estimated by fitting an animal model to the data can significantly improve mean body and carcass weight in GFP.

Identificador

http://eprints.qut.edu.au/62477/

Publicador

Elsevier BV

Relação

DOI:10.1016/j.aquaculture.2013.04.027

Hung, Dinh, Nguyen, Nguyen Hong, Ponzoni, Raul W., Hurwood, David A., & Mather, Peter B. (2013) Quantitative genetic parameter estimates for body and carcass traits in a cultured stock of giant freshwater prawn (Macrobrachium rosenbergii) selected for harvest weight in Vietnam. Aquaculture, 404-405, pp. 122-129.

Direitos

Copyright 2013 Elsevier B.V.

Fonte

School of Earth, Environmental & Biological Sciences; Science & Engineering Faculty

Palavras-Chave #Body and carcass weight traits #Correlations #Heritability #Macrobrachium rosenbergii
Tipo

Journal Article