CAJ | 학술논문

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.
통과대황어15개반동포가계어묘대저염、저용양화저pH치수체적항성시험,채용반동포조내상관법,대대황어내각배경인자유전력진행료고계.결과표명,대황어40일령어묘재수체용양4.76-1.21mg/L시2.5-10h이내전부사망,염도8.05-9.03시1-30h내전부사망,pH치4.49-5.2시1-8h내전부사망;대내저용양、저염화저pH치적유전력고계치분별위0.23、0.10화0.23,t검험표명대내저용양화저pH치적유전력고계체도현저수평,내저염유전력적고계불현저.
Larimichthys crocea is an important economical fish inhabiting often in China, whose heritability is an im-portant 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 Model) module of SAS9.0 software. The results show that 40-day-old fries died entirely in lOh 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.