| 摘要: |
| 通过大黄鱼15 个半同胞家系鱼苗对低盐、低溶氧和低pH 值水体的抗性试验, 采用半同胞组内相关法, 对大黄鱼耐各环境因子遗传力进行了估计。结果表明, 大黄鱼40 日龄鱼苗在水体溶氧4.76—1.21mg/L 时2.5—10h 以内全部死亡, 盐度8.05—9.03 时1—30h 内全部死亡, pH 值4.49—5.2时1—8h 内全部死亡; 对耐低溶氧、低盐和低pH 值的遗传力估计值分别为0.23、0.10 和0.23, t检验表明对耐低溶氧和低pH 值的遗传力估计达到显著水平, 耐低盐遗传力的估计不显著。
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| 关键词: 大黄鱼, 环境因子, 遗传力 |
| DOI：10.11693/hyhz200906017017 |
| 分类号: |
| 基金项目:国家863 计划项目, 2006AA10A405 号; 国家自然科学基金项目, 30271037 号; 福建省农业科技重大专项资助, 2004NZ03-1号 |
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| HERITABILITY AND TOLERANCE OF LARIMICHTHYS CROCEA TO ENVIRONMENTAL FACTORS |
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WANG Xiao-Qing,WANG Zhi-Yong,HE Xiang-Rong
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1.College of Animal Science and Technology, Hunan Agricultural University;2.Fisheries College of Jimei University
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| Abstract: |
| Larimichthys crocea is an important economical fish inhabiting often in China, whose heritability is an important genetic character for preserving quality traits. In this study, test on its tolerability to low-salinity, low-oxygen and low-pH water in 15 semi-sib family of L. crocea, and heritability estimation on the tolerability was performed. Causal components of phenotypic variance were calculated with GLM (General Linear Mode1) module of SAS9.0 software. The results show that 40-day-old fries died entirely in 10h as oxygen changed from 4.76 to 1.21mg/L, in 30h as salinity from 8.05 to 9.03, and in 8h when pH from 4.49 to 5.20. The heritability of tolerance to low-oxygen, low-salinity, low-pH was 0.23, 0.10, 0.23, respectively. The heritability on low-oxygen and low-pH reached significant level but low-salinity by t-test. The results are meaningful for quality breeding and yield increasing in aquiculture of L. crocea.
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| Key words: Larimichthys crocea, Environmental factor, Heritability |
