Beacham T D, Murray C B
Department of Fisheries and Oceans, Pacific Biological Station, Nanaimo, B.C., Canada.
Genome. 1988 Aug;30(4):529-35. doi: 10.1139/g88-089.
Variation in growth and sexual maturity was examined for five stocks of pink salmon (Oncorhynchus gorbuscha) spawning at different times in British Columbia. In each stock, four males were mated with eight females in a nested breeding design, and the juveniles were reared for 500 d after fry emergence. Adults in early-spawning northern stocks were smaller than those in late-spawning southern ones, but pink salmon from northern stocks had faster growth rates than those from southern ones. The relative ranking within stocks of family weight remained constant after late winter in the year of maturity. Heritability of weight based upon sire variance components was usually greater than 0.9 after 150 d of rearing. Pink salmon from the earlier-spawning stocks were in a more advanced state of sexual maturity when the experiment was terminated than were those from later-spawning stocks, indicative of a significant genetic component in timing of sexual maturity.
对在不列颠哥伦比亚省不同时间产卵的五群粉鲑（Oncorhynchus gorbuscha）的生长和性成熟差异进行了研究。在每一群中，采用嵌套育种设计，让4只雄性与8只雌性交配，幼鱼孵化后饲养500天。早期产卵的北方种群的成年鱼比晚期产卵的南方种群的成年鱼体型小，但北方种群的粉鲑比南方种群的生长速度更快。成熟年份冬末之后，各家族体重在种群内的相对排名保持不变。基于父本方差成分的体重遗传力在饲养150天后通常大于0.9。实验结束时，早期产卵种群的粉鲑比晚期产卵种群的粉鲑性成熟程度更高，这表明性成熟时间存在显著的遗传成分。
