在某一繁殖季节,从两个繁殖场繁殖的虹鲑子代中,发现了蛋白位点的基因频率统计学上的显著差异,在这个繁殖季节中,中期繁殖所得子代一般说来比早期或晚期所得子代具有更多的遗传变异。这一结果表明,虹鲑基因组中可能有许多基因影响产卵时间。因此,选择不同时间繁殖的后代作为预备亲鱼可以最有效地保持该品系的遗传变异。 In a breeding season, statistically significant differences in the gene frequencies of protein loci were found in rainbow trout progeny that had been bred from both breeding grounds during this breeding season, in which medium-term reproduction of the offspring was generally earlier than earlier Or late progeny have more genetic variation. This result suggests that there may be many genes in the salmon genome that affect oviposition time. Therefore, selecting offspring breeding at different times as the reserve broodstock can maintain the genetic variation of the line most effectively.