Analyses of growth performance and realized heritability of Pampus argenteus in a breeding program in China

Abstract

Silver pomfret (Pampus argenteus) is an economically important mariculture species. However, little is known about the genetic parameters of its commercially important traits. In order to determine whether continuous progress can be achieved by selection for growth, we took the body weight trait of East China Sea P. argenteus as the target trait of mass selection. The realized heritability of P. argenteus from the selected group and control group was analyzed at the three growth times (60, 90, and 120 days). The results showed that the growth performance parameters of the selected group in the third month post hatching were higher than those in the control group, but the opposite results were found in the fourth month. The morphological traits highly correlated with the body weight of P. argenteus were found by Pearson correlation analysis and path analysis, which were body length and tail length, respectively. On the 60th, 90th, and 120th days after hatching, the genetic gains of body weight trait in the selected group were 9.44%, 17.64%, and 15.18%, respectively, and the mean values of realized heritability were at moderate level. Nevertheless, in the selected group, the genetic variation values of the two morphological traits significantly related to body weight were all below 10%, and the genetic gains were relatively low and stable, but the genetic variation values of body weight trait in the selected group were above 20%, and genetic gains were relatively high. These implied that it is possible to obtain considerable genetic gains by selecting for body weight trait, and the results provide supportive evidence for the continuity of the P. argenteus-selective breeding program.

Analyses of growth performance and realized heritability of the second generation of Indo‐PacificPampus argenteus

“…Zhang et al . (2022) found that the body length and tail length were the morphological traits significantly related to the body weight of P. argenteus . This is inconsistent with the results of this study, which may be caused by the environmental factors in different regions.…”

“…In this study, the fertilization rate and hatching rate of FS1 were 37.68% and 32.45%, both higher than results of Zhang et al . (2022). This is probably because the authors carried out the preliminary preparation for gonadal strengthening of parent fish.…”

“…For the feeding of fry, to better domesticate the P. argenteus fry to adapt to pelleted feed, the authors optimized the pellet feeding scheme of Zhang et al . (2022). The use of pellet compound feed can reduce the cost of farming, the use of manpower and material resources, and reduce the pollution of the pond water at the same time (Table 1).…”

“…In recent years, there are some reports of successful artificial breeding of P. argenteus in Zhejiang Province, Guangdong Province, and Jiangsu Province of China and Kuwait (Al‐Abdul‐Elah et al ., 2021). Zhang et al ., (2022) had applied mass selection to P. argenteus in Zhoushan, Zhejiang Province. It is an immediate need to cultivate new varieties to meet the market demand and sustainable utilization of P. argenteus germplasm resources.…”

Morphological and Molecular Functional Evidence of the Pharyngeal Sac in the Digestive Tract of Silver Pomfret, Pampus argenteus

“…As an economically important marine fish worldwide, the artificial propagation and selective breeding of P. argenteus have been studied extensively. The food items used for farmed P. argenteus mainly comprise copepods, jellyfish, mackerel surimi, and Yubao compound feed [ 22 ]. However, owing to a lack of information on the basic biology of this fish, on some occasions, poor nutrition leads to slow growth of P. argenteus during breeding.…”