Beacham T D, Murray C B
Department of Fisheries and Oceans, Fisheries Research Branch, Nanaimo, B.C.
Genome. 1988 Feb;30(1):31-5. doi: 10.1139/g88-006.
Two small-sized and two large-sized male pink salmon (Oncorhynchus gorbuscha) were mated to each of four females, producing eight families sired by small males and eight sired by large males. The juveniles were reared for 500 d after fry emergence. Juvenile weight in the two male size classes was similar until the spring of the year of maturity, when juveniles sired by large males grew faster than those sired by small ones. Heritability estimates of weight based upon the dam component of variance increased during 500 d of rearing from 0.4 to 0.8. Heritability of weight based upon the sire component of variance generally ranged between 0.1 and 0.3. The large variation in male body size in spawning pink salmon populations may have resulted from different male breeding strategies.
将两条小型雄性驼背大麻哈鱼（Oncorhynchus gorbuscha）和两条大型雄性驼背大麻哈鱼分别与四条雌性大麻哈鱼进行交配，产生了八个由小型雄鱼授精的家系和八个由大型雄鱼授精的家系。幼鱼在孵化后饲养500天。在性成熟当年春季之前，两个雄性体型类别的幼鱼体重相似，之后大型雄鱼所产幼鱼的生长速度快于小型雄鱼所产幼鱼。基于母本方差成分的体重遗传力估计值在500天的饲养期内从0.4增加到了0.8。基于父本方差成分的体重遗传力一般在0.1至0.3之间。产卵期驼背大麻哈鱼种群中雄性体型的巨大差异可能是由不同的雄性繁殖策略导致的。
