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中国农学通报 ›› 2022, Vol. 38 ›› Issue (35): 141-147.doi: 10.11924/j.issn.1000-6850.casb2021-0988

所属专题: 生物技术 水产渔业

• 水产·渔业 • 上一篇    下一篇

脊尾白虾低盐种群形态性状对体质量影响的通径分析

张年国1(), 周裕华1, 潘桂平1, 周文玉1, 侯文杰1, 刘本伟1, 于飞2()   

  1. 1上海市水产研究所,上海市水产技术推广站,上海 200433
    2连云港市海洋与渔业发展促进中心,江苏连云港 222003
  • 收稿日期:2021-10-19 修回日期:2022-04-14 出版日期:2022-12-15 发布日期:2022-12-09
  • 通讯作者: 于飞
  • 作者简介:张年国,男,1981年出生,山东莒南人,高级工程师,硕士,研究方向为水产养殖与遗传育种。通信地址:200433 上海市杨浦区佳木斯路265号 上海市水产研究所,E-mail:z817382@126.com
  • 基金资助:
    上海市科技兴农种源创新项目“脊尾白虾良种选育与低盐度养殖示范”(2020-02-08-00-07-F01451)

Path Analysis of Morphological Trait Effects on Body Weight of Low-salinity Population of Exopalaemon carinicauda

ZHANG Nianguo1(), ZHOU Yuhua1, PAN Guiping1, ZHOU Wenyu1, HOU Wenjie1, LIU Benwei1, YU Fei2()   

  1. 1Shanghai Fisheries Research Institute, Shanghai Fisheries Technical Extension Station, Shanghai 200433
    2Lianyungang Marine and Fisheries Development Promotion Center, Lianyungang, Jiangsu 222003
  • Received:2021-10-19 Revised:2022-04-14 Online:2022-12-15 Published:2022-12-09
  • Contact: YU Fei

摘要:

为研究脊尾白虾低盐种群亲本形态性状对体质量性状的影响,随机选取上海奉贤地区的脊尾白虾低盐种群亲本100尾(40尾抱卵和60尾未抱卵),分别测量体长(X1)、头胸甲长(X2)、头胸甲宽(X3)、头胸甲高(X4)、第一腹高(X5)、第一腹宽(X6)、腹部长(X7)、额剑长(X8)、尾节长(X9)、体质量(Y)等10个指标,采用相关分析、通径分析和回归分析方法,分析低盐种群亲本主要形态性状对体质量的影响,并建立回归方程。结果表明,脊尾白虾低盐抱卵亲本的形态性状普遍高于未抱卵亲本,除体质量外,它们之间并不存在显著差异(P>0.05),抱卵亲本和非抱卵亲本的各形态性状与体质量的相关性均达到极显著水平(P<0.01);通径分析结果表明,低盐抱卵亲本的头胸甲长、头胸甲宽、尾节长对体质量的直接作用均达到极显著水平(P<0.01),其中尾节长的作用最大(0.900),在未抱卵亲本中,所有保留性状均达到显著(P<0.05)或极显著水平(P<0.01),其中头胸甲长的作用最大(0.747);利用逐步回归分析法,对抱卵亲本和非抱卵亲本的形态性状与体质量建立最优回归方程分别为:Y=-5.480+0.583X2-0.838X3+5.756X9Y=-5.870+0.203X1+1.314 X2+2.532 X4+2.820 X6-1.001 X 8,对回归方程进行方差分析和偏回归系数检验发现均达到极显著水平(P<0.01)。本研究结果可为脊尾白虾低盐良种选育提供理论依据和测度指标。

关键词: 脊尾白虾, 亲本, 形态性状, 体质量, 通径分析

Abstract:

In order to study the effects of morphological traits on body weight of low-salinity population of Exopalaemon carinicauda, 100 samples, including 40 egg-carrying individuals and 60 normal individuals, were randomly selected from Fengxian of Shanghai and their weight (Y), body length (X1), cephalothorax length (X2), cephalothorax width (X3), cephalothorax height (X4), first abdominal segment height (X5), first abdominal segment width (X6), abdomen length (X7), length of upper frontal eminence (X8), and telson length (X9) were measured. Correlation analysis, path analysis and regression analysis were used to analyze the effects of morphological traits on body weight of parents of low-salinity population, and the multiple regression equations were constructed. The results showed that there was no significant variation (P>0.05) in the morphological traits except body weight, and morphological traits of egg-carrying parents were higher than those of non-egg carrying parents, the correlation of each morphological trait to body weight all reached an extremely significant level (P<0.01). According to path analysis, the main morphological traits such as cephalothorax length, cephalothorax width and telson length in egg-carrying individuals of low-salinity population had a predominantly direct effect on body weight, reaching a significant level (P<0.01), and the maximal effect was achieved by telson length (0.900). The direct effect of main traits on body weight reached significant or extremely significant levels in non-eggcarrying parents, and cephalothorax length had the maximal effect (0.747).The stepwise regression analysis indicated that the optimal linear regression equation of the effects on body weight was Y=-5.480+0.583X2-0.838X3+5.756X9 in egg-carrying individuals and Y=-5.870+0.203X1+1.314 X2+2.532 X4+2.820 X6-1.001 X8 in non-egg carrying individuals respectively, and the two regression equations between body weight and morphological traits were expressed at a very significant level (P<0.01) by means of variance analysis and partial regression coefficient test. The finding of this study provides theoretical reference and measurement indexes for selective breeding of E. carinicauda of low-salinity population.

Key words: Exopalaemon carinicauda, parent, morphological trait, body weight, path analysis

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