Yoshida Grazyella M, Oliveira Carlos A L DE, Kunita Natalí M, Rizzato Gabriel S, Ribeiro Ricardo P
Programa de Pós-Graduação em Genética e Melhoramento Animal, Departamento de Zootecnia, Universidade Estadual "Júlio de Mesquita Filho", Faculdade de Ciências Agrárias e Veterinárias, FCAV/UNESP, Via de Acesso Prof. Paulo Donato Castellane, s/n, 14884-900 Jaboticabal, SP, Brazil.
Programa de Pós-Graduação em Zootecnia, Departamento de Zootecnia, Av. Colombo, 5790, Jd. Universitário, 87020-900 Maringá, PR, Brazil.
An Acad Bras Cienc. 2017;89(3 Suppl):2515-2523. doi: 10.1590/0001-3765201720160063.
Genetic parameters for reproductive traits in female Nile tilapia were estimated in this study using Bayesian inference method. The data set presented information from 451 Nile tilapia females that were evaluated at two different places in Maringá - Paraná - Brazil (hapas of 1 and 10 m³) and at one location in Alfenas - Minas Gerais - Brazil. A spawning examination was conducted once a week from October 2012 to March 2013 for a total of 23 weeks of evaluation. Single-trait analyses for spawning success, multiple spawning, spawning frequency, and volume of eggs/female were performed by using the software MTGSAM Threshold. The heritability estimates were 0.14, 0.16, 0.53, and 0.08 for spawning success, multiple spawning, spawning frequency and volume of eggs/female, respectively, indicating it is possible to achieve a substantial genetic gain using these reproductive traits as selection criteria.
本研究采用贝叶斯推理方法估计了尼罗罗非鱼雌鱼繁殖性状的遗传参数。数据集提供了451条尼罗罗非鱼雌鱼的信息，这些雌鱼在巴西巴拉那州马林加的两个不同地点（1立方米和10立方米的网箱）以及巴西米纳斯吉拉斯州阿尔费纳斯的一个地点进行了评估。从2012年10月至2013年3月，每周进行一次产卵检查，总共评估23周。使用软件MTGSAM Threshold对产卵成功率、多次产卵、产卵频率和每雌鱼产蛋量进行单性状分析。产卵成功率、多次产卵、产卵频率和每雌鱼产蛋量的遗传力估计值分别为0.14、0.16、0.53和0.08，这表明将这些繁殖性状作为选择标准有可能实现显著的遗传增益。
