An introduced turbot population was used to establish families and to estimate genetic parameters of the offspring. However, there is a lack of pedigree information, and common environmental effects can be introduced when each full-sib family is raised in a single tank. Therefore, in the genetic evaluation, SSRs (simple sequence repeats) were used to reconstruct the pedigree and to calculate molecular relatedness between individuals, and the early mixed-family culture model was used to remove the impact of the common environmental effects. After 100 d of early mixed culture, twenty SSRs were used to cluster 20 families and to calculate paired molecular relationships (n=880). Additive genetic matrices were constructed using molecular relatedness (MR) and pedigree reconstruction (PR) and were then applied to the same animal model to estimate genetic parameters. Based on PR, the heritabilities for body weight and body length were 0.214±0.124 and 0.117±0.141, and based on MR they were 0.101±0.031 and 0.102±0.034, respectively. Cross validation showed that the accuracies of the estimated breeding values based on MR (body weight and body length of 0.717±0.045 and 0.629±0.141, respectively) were higher than those of PR (body weight and body length of 0.692±0.052 and 0.615±0.060, respectively). The MR method ensure availability of all genotyped selection candidates, thereby improving the accuracy of the breeding value estimation.

引入的大菱鲆种群被用于建立家庭并估计后代的遗传参数。然而，缺乏系谱信息，当每个全同胞家族在一个水族箱中饲养时，可能会引入常见的环境影响。因此，在遗传评估中，利用SSRs（简单序列重复）来重建谱系和计算个体之间的分子相关性，并利用早期混合家庭文化模型去除共同环境效应的影响。早期混合培养 100 d 后，使用 20 个 SSR 对 20 个家族进行聚类并计算配对分子关系（n=880）。使用分子相关性 (MR) 和谱系重建 (PR) 构建加性遗传矩阵，然后将其应用于相同的动物模型以估计遗传参数。基于 PR，体重和体长的遗传力分别为 0.214±0.124 和 0.117±0.141，基于 MR，它们分别为 0.101±0.031 和 0.102±0.034。交叉验证表明，基于MR（体重和体长分别为0.717±0.045和0.629±0.141）的估计育种值的准确性高于PR（体重和体长分别为0.692±0.052和0.615± 0.060，分别）。MR 方法确保所有基因分型选择候选者的可用性，从而提高育种价值估计的准确性。