Genetic Differences in the Early Development and Growth of Sympatric Sockeye Salmon and Kokanee (Oncorhynchus nerka), and their Hybrids
Genetic Differences in the Early Development and Growth of Sympatric Sockeye Salmon and Kokanee (Oncorhynchus nerka), and their Hybrids
复制标题
同域红鲑鱼和 Kokanee (Oncorhynchus nerka) 及其杂交种早期发育和生长的遗传差异
DOI：
10.1139/f90-250
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发表时间：
1990
影响因子：
2.4
通讯作者：
C. Foote
中科院分区：
文献类型：
--
作者：
C. Wood;C. Foote
在不列颠哥伦比亚省的一些河流中，溯河产卵的（红鲑鱼）和非溯河产卵的（红鲑）在地理上是对称的，但在遗传上是不同的。为了研究遗传差异是否通过选择来保持，我们在控制孵育条件下，培养了shuuswap河红鲑和kokanee的纯互交组合。无论雄鱼类型如何，红眼鱼卵都比红眼鱼卵更大，存活时间也略好于红眼鱼卵。在剩下的460天的研究中，我们观察到杂交类型之间的存活率没有差异。赤眼蜂的蛋黄吸收速率与赤眼蜂的相似，但赤眼蜂的蛋黄吸收速率显著高于赤眼蜂的蛋黄吸收速率。这表明雄性遗传效应弥补了卵子大小的差异。由于卵的大小与雄性基因型不匹配，杂交苜蓿发育不同。鱼苗的生长速率在…
Anadromous (sockeye salmon) and nonanadromous (kokanee) Oncorhynchus nerka spawn sympatrically yet appear genetically distinct in a number of rivers in British Columbia. To investigate whether genetic differences are maintained by selection against -hybrid" progeny, we raised pure and reciprocal crosses of Shuswap River sockeye and kokanee under controlled hatchery conditions. Sockeye eggs were larger and survived slightly better than kokanee eggs, regardless of male type, both to the eyed egg stage and as young fry. We observed no differences in survival among cross types during the remainder of the 460 d study. Rate of yolk absorption was similar in pure sockeye and pure kokanee alevins, but significantly faster in alevins sired by sockeye than those sired by kokanee. This indicates a male genetic effect which compensates for the difference in egg size. Hybrid alevins developed differently because egg size is mismatched with the male genotype. Growth rates of fry were significantly more variable within ...