A method for distinguishing between northern and southern breeding populations of sea bass

Abstract

The invention discloses a method for distinguishing the southern and northern breeding groups of sea bass, Establishment of discriminant formula: Through the combination of traditional morphological data and framework data, The differences of morphological parameters between the two populations were found, and the non-significant correlation variables were eliminated by stepwise discriminant analysis. Finally, five parameters were selected, which contributed greatly to the discrimination: the first dorsal fin origin to the anal fin origin, the second dorsal fin end to the anal fin end, the anal fin base length, the head length and the total length, and the discriminant formulas of the northern and southern populations were established. The independent variable parameters of the unknown classification samples are obtained, and the values are substituted into the two Bayes discriminant functions to obtain two function values. The invention has the beneficial effects of providing data support for the division of the southern and northern populations of the sea bass, laying a foundation for directional breeding and establishing a scientific breeding technology.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a technical method for distinguishing and distinguishing northern and southern perch culture groups. Background technique [0002] Lateolabrax maculatus belongs to Perciformes, Serranidae, and Lateolabrax. It is one of the marine fish species with the highest aquaculture output in my country, with an annual output of more than 10×10 4 Ton. Scholars believe that there are southern and northern populations of sea bass in my country. The southern population mainly includes the coastal population of the South China Sea and the Beihai population of Guangxi, while the northern population of sea bass includes the coastal populations of the Yellow Sea and the Bohai Sea and the coastal population of the East China Sea. It has been confirmed by isozyme and RAPD molecular means He put forward the theory of "the differentiation of the two populations of the northern and southern perch", bu...

AI Technical Summary

Problems solved by technology

At present, my country lacks excellent species of perch. With the development of the north-south relay breeding model, the population of the north and the south has become more mixed. There has been no targeted breeding, and no scientific breeding technology has been established. Long-term inbreeding has led to the growth and disease resistance of the perch. The performance declines, and the difference between the countable traits of different geographical groups is not significant, which is not enough to achieve the purpose of distinction. Therefore, this study is based on the morphological differences of the quantifiable traits between the northern and southern populations of the perch, and establishes a discriminant formula. The population division can be simply distinguished from the appearance, provide actual production guidance, avoid inbreeding, and lay the foundation for hybrid breeding, genetic improvement, etc.

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