CAJ | 학술논문

通过人工受精的方法获得红鳍东方鲀8个半同胞家系(16个全同胞家系)，共测量了790尾红鳍东方鲀8个半同胞家系(16个全同胞家系)135日龄和200日龄的体质量和体长。将135日龄生长性状作为协变量构建3个动物模型，模型(1)包含加性遗传效应、母本遗传效应和全同胞效应；模型(2)包含加性遗传效应和母本遗传效应；模型(3)包含加性遗传效应和全同胞效应。利用 DMU软件，采用平均信息约束极大似然法估计各模型中性状的方差组分，用似然比检验法进行不同模型的差异检验。选择最优模型估计红鳍东方鲀200日龄生长性状的遗传参数。结果表明，母本遗传效应对200日龄红鳍东方鲀生长性状无显著影响，确定模型(3)为最优模型。200日龄红鳍东方鲀，体质量和体长的遗传力分别为0.16和0.14，全同胞效应比率分别为0.12和0.13。研究表明，红鳍东方鲀生长性状具备一定的选择潜力，应用家系选育方法能够获得较好的遗传进展。
통과인공수정적방법획득홍기동방돈8개반동포가계(16개전동포가계)，공측량료790미홍기동방돈8개반동포가계(16개전동포가계)135일령화200일령적체질량화체장。장135일령생장성상작위협변량구건3개동물모형，모형(1)포함가성유전효응、모본유전효응화전동포효응；모형(2)포함가성유전효응화모본유전효응；모형(3)포함가성유전효응화전동포효응。이용 DMU연건，채용평균신식약속겁대사연법고계각모형중성상적방차조분，용사연비검험법진행불동모형적차이검험。선택최우모형고계홍기동방돈200일령생장성상적유전삼수。결과표명，모본유전효응대200일령홍기동방돈생장성상무현저영향，학정모형(3)위최우모형。200일령홍기동방돈，체질량화체장적유전력분별위0.16화0.14，전동포효응비솔분별위0.12화0.13。연구표명，홍기동방돈생장성상구비일정적선택잠력，응용가계선육방법능구획득교호적유전진전。
Redfin puffer is an important marine fish species and is widely cultured in China, Korea and Japan because of its high edible value. It is common that in the development of redfin puffer aquaculture cultivated fingerlings showed slow growth rate and poor resistance to disease. To improve the traits of interest, accurate estimation of their genetic parameters is needed to develop selective breeding programs. However, the heritability of different growth traits in redfin puffer has been rarely reported so far. In this study, we generated eight half-sib families (16 full-sib families) of redfin puffer Takifugu rubripes with artificial insemination to select the optimal model of genetic evaluation and to acquire accurate and reliable genetic parameters of the growth traits. Two growth traits of 790 redfin puffers from these families were measured, including the body weight and the body length. The growth traits at 135 days of age were used as covariates to construct three animal models as below:in model (1) the additive genetic effect, the maternal genetic effect and the family effect were considered;in model (2) the additive genetic effect and the maternal genetic effect were included;and in model (3) the additive genetic effect and the family effect were analyzed. DMU software was applied to estimate the variance components in each model with the average information restricted maximum likelihood method, and the differences between the three models were analyzed with the likelihood ratio test. The optimal model was used to estimate the genetic parameters of growth traits at 200 days of age in redfin puffer. The results showed that the maternal effect was significant in none growth traits at 200 days of age. Thus, the optimal model should be model (3). At 200 days of age, the body weight and the body length showed heritability of 0.16 and 0.14 respectively, and full-sib effect ratio of 0.12 and 0.13 respectively. These results suggested that there could be a certain potential for growth traits during artificial selection and that family breeding could effectively improve these traits in redfin puffer.