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凡纳滨对虾不同世代生长性状的变异
Variation of growth traits at different generations of Pacific white shrimp (Litopenaeus vannamei)

作  者: ; ; ; ; ; ; ; (李色东);

机构地区: 中国水产科学研究院南海水产研究所

出  处: 《南方水产》 2007年第6期30-33,共4页

摘  要: 对从美国进口的选育凡纳滨对虾(Litopenaeus vannamei)海南群体(进口亲虾繁育的第1世代,G1)、山东和饶平群体(G2)、湛江2和湛江3群体(G3)、湛江1和上海群体(C,4)共7个养殖群体4个世代1150个个体的生长性状体长和体重进行了分析。7个群体的平均体长(范围)分别为14.76(13.25~15.99)、8.46(6.28~10.48)、9.24(4.28~10.70)、7.75(5.13~9.36)、11.38(8.13~14.12)、5.25(3.47~6.83)和7.14(4.14~9.00),变异系数分别为0.04、0.08、0.08、0.09、0.12、0.14、0.14,平均体重(范围)分别为33.41(24.33~39.74)、5.19(1.80~9.68)、6.95(3.18~11.34).4.62(1.52~9.87)、15.03(6.00~26.96)、1.47(0.48~3.42)、3.29(0.49~6.20),变异系数分别为0.10、0.23、0.21、0.27、0.32、0.39、0.36。体长和体重的变异系数随着繁育世代的增加而增加,其中体重的变异系数每繁殖1代增加10%,其第1代的变异系数与美国选育的亲本群体相同。体长、体重相关与回归分析表明,体长与体重相关极显著(P〈0.01),体长和体重的回归方程为形=0.0L。表明随着繁育世代的增加,生长性状逐代分化。 Variation of growth traits of body length and body weight was investigated in seven cultured stotcks of four generations of Pa- cific white shrimp (Litopenaeus vanaamei) , including Hainan stock (first generation of imported prawns, G1 ), Shandong and Raoping stocks ( G2 ) , Zhanjiang 2 and Zhanjiang 3 stocks ( G3 ) , Zhanjiang 1 and Shanghai stocks (G4). The average body lengths (ranges) were 14.76 (13.25~15.99), 8.46 (6.28~10.48),9.24 (4.28~10.70),7.75 (5. 13~9.36), 11.38 (8. 13 ~14.12), 5.25 (3.47 ~6. 83) and 7. 14 (4. 14 ~ 9. 00) in the seven stocks, respectively, and the coefficients of variances (CVs) of body length were 0. 04, 0. 08, 0. 08, 0. 09, 0. 12, 0. 14 and 0. 14, respectively. The average body weights (ranges) were 33.4i (24. 33 ~ 39.74), 5. 19 (1.80-9.68), 6.95 (3. 18 ~ 11.34), 4.62 (1.52~9.87), 15.03 (6.00-26.96), 1.47 (0.48~3.42) and 3. 29 (0. 49 ~6. 20), respectively, and the CVs of body weight were 0. 10, 0. 23, 0. 21, 0. 27, 0. 32, 0. 39 and 0. 36, respectively. The CVs of body length and body weight increased from generation to generation, and nearly 10% increment per generation was showed in the CVs of body weight. The CV of the first generation was similar to that of parental stock selected in USA. The correlation coefficient between body length and body weight was significant in each stock (P 〈 0. 01 ). The regression equation of body weight and body length was W = 0. 011,2. 93 based on all individuals. This study suggested that divergence of growth traits in Pacific white shrimp imported from USA have occrred from generation to generation.

关 键 词: 凡纳滨对虾 生长性状 变异系数 养殖群体

领  域: [农业科学]

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