Performance and carcass traits in the diallel crossing of pacu and tambaqui

Revista Brasileira de Zootecnia

Rafael Vilhena Reis Neto²  Moacyr Antonio Serafini¹  Rilke Tadeu Fonseca De Freitas²  Ivan Bezerra Allaman¹  Natália Michele Nonato Mourad²  Aline De Assis Lago² 

[1] ,Universidade Federal de Lavras DZO

关键词: body yield;    heterosis;    hybrids;    morphometry;    roundfish;   

DOI  :  10.1590/S1516-35982012001200002

来源: SciELO

【 摘 要 】

With the purpose of evaluating the changes and the degree of heterosis on performance and carcass traits of fish from the diallel crossing between Pacu and Tambaqui, four genetic groups were generated through hormonal induction: pacu, tambaqui, tambacu and paqui. For 196 days, 400 juveniles of each genetic group were stocked in a pond divided into four parts of equal size, one for each group. At the end of this period, when the fish weighed on average 1024 g (±115.52 g), 20 specimens of each genetic group were sampled, weighed, measured: head length; standard length; body height; and width; and also processed resulting in following body yield: viscera; carcass; head; fillet; rib; residue and skin yields. There was positive heterosis for body weight, viscera and skin yield and head measures and negative heterosis for carcass and filet yield and body width, indicating that the hybrids have better performance on weight gain, but are inferior in relation to the carcass conformation.

【 授权许可】

CC BY   
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