3月龄唇䱻形态性状对体质量影响分析

doi:10.16378/j.cnki.1003-1111.2020.05.010

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Abstract A total of 213 3-month-old Hemibarbus labeo were sampled for measuring 10 morphological traits including total length(x₁), body length(x₂), head length(x₃), snout length(x₄), orbital diameter(x₅), head length behind eye(x₆), head depth(x₇), body depth(x₈), caudal peduncle depth (x₉) and body weight(y). The results showed that the coefficient of variation of y(21.59%) was found to be the maximal value, higher than the others, with a normal distribution data of morphological traits. Correlation coefficients of morphological traits on body weight were all at very significant level(P<0.01). The path analysis revealed that the path coefficients of x₁, x₂, x₅, x₇, x₈and x₉were 0.218, 0.239, -0.075, 0.106, 0.339 and 0.211(P<0.05), with larger determination coefficients of x₈ (0.115) than others. And the determination coefficient (0.111) of x₂ and x₈ to y was higher than others. The value of correlation index between morphological traits and body weight was 0.894 (r²),with significant regression relations (P<0.05),indicating that the six selected attributes (x₁, x₂, x₅, x₇, x₈and x₉) were key morphological traits to the body weight and practical in the selective breeding of H. labeo. The morphological traits were used to establish the multiple regression equations was y =-3.935+0.234x₁+0.303x₂-1.018x₅+0.700x₇+1.414x₈+1.976x₉ (P<0.05).

Key words： Hemibarbus labeo morphometric trait correlation analysis path analysis multiple regression equation

Received: 26 August 2019

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	WEN Hao
	ZHANG Jian

Cite this article:

WEN Hao,ZHANG Jian. Effects of Morphological Traits on Body Weight in 3-month Old Hemibarbus labeo[J]. Fisheries Science, 2020, 39(5): 719-726.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.2020.05.010 OR https://www.shchkx.com/EN/Y2020/V39/I5/719

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