关键词: 大刺鳅, 全同胞家系, 遗传力, 育种值

Abstract: With the gradual rise of aquaculture of Mastacemblus armatus, the problems such as germ plasm confusion and unclear genetic background have become increasingly prominent, which are not conducive to the commercial development of variety. In order to explore the breeding potential of M. armatus, this study used wild M. armatus as parents to construct 17 full-sib families through full-sib breeding model. After 18 months of cultivation, seven effective families were finally obtained. The single trait animal model was used to estimate the breeding value and heritability of each individual by BLUP, with the average body weight of each family as a covariate. The variance component evaluation results of the full-sib family weight of 18 pfm M. armatus showed that the heritability was (0.468 1±0.173 7), the t test reached P < 0.01, and the body weight had a positive correlation with breeding value. The regression equation of male was y = 0.393 6x - 84.193 0 (R2 = 0.755 4, P < 0.01); the female was y = 0.517x - 64.126 (R2 = 0.817 8, P < 0.01). The females with the top 50 breeding values were mainly concentrated in family B, E and D, especially family B, the top 24 females and top 19 males were from this family. The maximum breeding value of male fish was 75.09, and that of female fish was 67.49, both of them were from the same family B. Through this study, the M. armatus had high heritability of body weight, which could be selected by phenotype or BLUP breeding value.

Key words: Masracembelue armatu, full-sib family, heritability, breeding value