[en] We aimed to estimate transgenerational epigenetic variance for body weight usinggenealogical and phenotypic information in meat quails. Animals were individu-ally weighted from 1 week after hatching, with weight records at 7, 14, 21, 28,35 and 42 days of age (BW7, BW14, BW21, BW28, BW35 and BW42, respec-tively). Single-trait genetic analyses were performed using mixed models withrandom epigenetic effects. Variance components were estimated by the restrictedmaximum likelihood method. A grid search for values of autorecursive parameter(k) ranging from 0 to 0.5 was used in the variance component estimation. Thisparameter is directly related to the reset coefficient (m) and the epigenetic coeffi-cient of transmissibility (1-m). The epigenetic effect was only significant for BW7.Direct heritability estimates for body weight ranged in magnitude (from 0.15 to0.26), with the highest estimate for BW7. Epigenetic heritability was 0.10 forBW7, and close to zero for the other body weights. The inclusion of the epige-netic effect in the model helped to explain the residual and non-Mendelian vari-ability of initial body weight in meat quails.
Disciplines :
Animal production & animal husbandry
Author, co-author :
De Paiva, José Teodoro ; Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions animales et nutrition
Vilela de Resende, Marcos Deon
Tassinari Resende, Rafael
Rojas de Oliveira, Hinayah
Texeira Silva, Hugo
Caetano, Giovani da Costa
Sávio Lopes, Paulo
Fonseca e Silva, Fabyano
Language :
English
Title :
Transgenerational epigenetic variance for body weight in meatquails
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