Optimization of selective breeding through analysis of morphological traits in Chinese sea bass (Lateolabrax maculatus)

Abstract

ABSTRACT. Determining correlations between certain traits of economic importance constitutes an essential component of selective activities. In this study, our aim was to provide effective indicators for breeding programs of Lateolabrax maculatus, an important aquaculture species in China. We analyzed correlations between 20 morphometric traits and body weight, using correlation and path analyses. The results indicated that the correlations among all 21 traits were highly significant, with the highest correlation coefficient identified between total length and body weight. The path analysis indicated that total length (X 1 ), body width (X 5 ), distance from first dorsal fin origin to anal fin origin (X 10 ), snout length (X 16 ), eye diameter (X 17 ), eye cross (X 18 ), and slanting distance from snout tip to first dorsal fin origin (X 19 ) significantly affected body weight (Y) directly. The following multiple-

Comparison of morphology and genetic diversity between broodstock and hybrid offspring of oriental river prawn, Macrobrachium nipponense based on morphological analysis and SNP markers

“…Path analysis can identify morphological traits related to other important economic traits that have a greater impact on body weight in the cultured species and plays an important role in the breeding of species (Wang et al . 2016). The results show that different geographic populations (broodstocks) have different dominant traits that have a strong influence on body weight, which may be due to differences in their morphological phenotype when adapting to the environment (Dimmock 2004).…”

Molecular Identification of Chrotogonus spp. (Pyrgomorphidae: Caelifera: Orthoptera)

“…Even if enhancing production is one of the key objectives in aquaculture, due to the effects of genetic linkage, pleiotropy and environmental factors (Wang et al, 2016;Fu et al, 2015;Toro and Newkirk, 1990), it has been proven difficult to achieve satisfactory results in the selected programs, only taking BW into account. However, BW is highly correlated with many other morphological traits (Pérez-Rostro and Ibarra, 2003).…”

“…Correlation analysis indicated that all 13 morphometric traits were significantly correlated with BW in case of both males and females belonging to S. argus (P < 0.01), thus suggesting its feasibility to pick one target trait by selecting other traits in the artificial breeding of S. argus (Ma et al, 2013). Morphological traits are ordinarily employed as a reference for selection in artificial breeding programs (Wang et al, 2016;Liu et al, 2016). In sutchi catfish (Pangasianodon hypophthalmus), full length, head width, body width, and depth at the caudal peduncle are closely related to the BW (An et al, 2013).…”

Analysis of the morphological characteristics and direction of morphology- based selective breeding of Procambarus clarkii

“…The tail meat content is related with some morphological traits to some extent, including body weight and those that are mainly concentrated in the abdomen of P. clarkii (Wang et al 2020). At present, the research on morphological traits has been widely used in the breeding of some other various aquatic animals (Wang et al 2016;Zou et al 2017;Li et al 2018). Generally, for P. clarkii, the greater the proportion of abdomen and the smaller the proportion of carapace, the higher the meat content ).…”