2024/11/11 15:00:42 2024/11/11 15:00:42 2024/11/11 15:00:42 2024/11/11 15:00:42 2024/11/11 15:00:42 2024/11/11 15:00:43 2024/11/11 15:00:43 2024/11/11 15:00:43 2024/11/11 15:00:43 2024/11/11 15:00:43 2024/11/11 15:00:43 2024/11/11 15:00:43 db , indicated that the negative additive effect of the first major gene was dominant. In epistatic genetic effects, gene additive-additive interactions were the main positive effects. The second-order genetic parameters indicated that the genetic variance of the major gene was 32.1590, the genetic variance of the polygenes was 1.1540, and the heritability rates of the major gene and the polygenes were 93.69% and 3.36%, respectively. 【Conclusion】The heritability of major genes for the pulp color of chieh-qua is much higher than that of polygenes, and the major genes are dominant. Therefore, we should pay attention to the use of major genes in the process of high-quality breeding of chieh-qua, and we can select in early generations and improve chieh-qua by combined breeding.]]> 2024/11/11 15:00:43 2024/11/11 15:00:43 2024/11/11 15:00:43 0.05). However, the daily feed intake, specific growth rate, daily weight gain rate and weight gain rate of the test group T. ovatus were 2.64%, 1.35%, 2.73%, 247.34%，which were 0.21，0.03，0.07，2.25 percentage point higher than those of the control group, respectively，while the feed coefficient that was 0.03 percentage point lower. The levels of total cholesterol (T-CHO), serum triglyceride(TG), low-density lipoprotein cholesterol(LDL-C) in the test group were 0.88, 0.18, 0.30 mmol/L, which were significantly reduced when compared with the control group, while the HDL-C/LDL-C ratio (102.20%) was significantly increased (P < 0.05). In terms of muscle quality, there was no significant difference in muscle protein and fat content as well as amino acid composition (total amino acids, essential amino acids and flavor amino acids) between the two groups (P > 0.05). However, the test feed significantly improved the texture characteristics of the muscle and increased the EPA level in the muscle. Furthermore, compared with the commercial feed, the cost of the test feed was reduced by 8.65%, and the aquaculture benefit was increased by 17.76%.【Conclusion】In the aquaculture of large-sized T. ovatus, the high-efficient and low-fishmeal compound feed exhibits similar growth-promoting effects as commercial feed, and it helps to reduce blood lipids, lower aquaculture costs, and improve aquaculture benefits. The above results indicate that the high-efficient and low-fishmeal compound feed can be applied in the entire aquaculture cycle of T. ovatus.]]> 2024/11/11 15:00:43 2024/11/11 15:00:43