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研究了蛋白含量为34%、38%、42%的3种饲料对16个斑节对虾家系生长的影响。试验结果表明,饲料中的蛋白水平影响家系的生长和成活率,除14号和15号家系的特定生长率在38%组和42%组近似外,其它家系的特定生长率均为34%组<38%组<42%组。11个家系在38%蛋白饲料组的成活率最高,5个家系在34%蛋白饲料组的成活率最高,4个家系在42%蛋白饲料组的成活率最高。16个家系间的生长差异随着饲料蛋白水平提高而缩小,表明斑节对虾在低蛋白水平饲料下显现出生长遗传效应的显著差异。研究发现父母本均来源于非洲的10号家系特定生长率最高,父母本来自同一地区的部分家系在不同蛋白饲料组内和组间生长存在显著差异。实验结果为通过家系选育筛选适应低蛋白水平饲料的快速品系提供了依据。
The effects of three kinds of feed with protein content of 34%, 38%, 42% on the growth of 16 Penaeus monodon families were studied. The results showed that the protein levels in the feed affected the growth and survival rate of the pedigree. The specific growth rates of other families were 34% except for the specific growth rates of the 14th and 15th lines in the 38% and 42% groups <38% group <42% group. Eleven families had the highest survival rates in the 38% protein feed group, five families had the highest survival rates in the 34% protein feed group, and four families had the highest survival rates in the 42% protein feed group. The differences in growth among the 16 families narrowed as feed protein levels increased, indicating significant differences in the genetic effects of growth on P. monodon at low protein levels. The study found that both parents were originally from Africa, the highest specific growth rate of 10 families, parents from the same region, some families in different protein feed groups and between groups were significantly different growth. The experimental results provide a basis for screening the fast line adapted to the low protein level feed through the pedigree selection.