RESPONSE TO INDIVIDUAL SELECTION FOR AGE AT SEXUAL MATURITY IN ATLANTIC SALMON
RESPONSE TO INDIVIDUAL SELECTION FOR AGE AT SEXUAL MATURITY IN ATLANTIC SALMON
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DOI：
10.1016/0044-8486(84)90147-9
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发表时间：
1984-01-01
期刊：
影响因子：
4.5
通讯作者：
GJERDE, B
中科院分区：
文献类型：
--
作者：
GJERDE, B
1岁（如parr或早熟雄性）、4岁（在海里过2个冬天后）和5岁（在海里过3个冬天后）性成熟的S. salar被用来研究个体选择性成熟年龄的反应。进行了六个交配组： 同龄鱼之间（4 × 4 和 5 × 5）； 4 岁和 5 岁鱼之间的相互交配（4 × 5 和 5 × 4）； 1岁早熟雄性与4岁和5岁雌性交配（1×4和1×5）。研究发现，父母的性成熟年龄对后代的性成熟年龄有显着影响。海洋中成熟年龄的遗传力估计为 0.48.+-。子代-母体回归的 0.20。通过选择有很大机会改变大西洋鲑鱼的性成熟年龄。帕尔的成熟可能是一种遗传性状，并且独立遗传自在海中的成熟。
S. salar that mature sexually at 1 yr of age (as parr or precocious males), at 4 yr of age (after 2 winters in the sea) and at 5 yr of age (after 3 winters in the sea) were used to study response to individual selection for age at sexual maturity. Six mating groups were made: between fish of the same age (4 .times. 4 and 5 .times. 5); reciprocal matings between 4- and 5-year-old fish (4 .times. 5 and 5 .times. 4); and matings between 1-yr-old precocious males and 4- and 5-yr-old females (1 .times. 4 and 1 .times. 5). Parental age at sexual maturity was found to influence markedly the offspring age at sexual maturity. The heritability for age at maturity in the sea was estimated at 0.48 .+-. 0.20 from the offspring-dam regression. There is considerable opportunity to alter the age at sexual maturity in Atlantic salmon through selection. Maturation of parr is probably a heritable trait and independently inherited from maturation in the sea.