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Comparison of gene expression in the gill of salmon (Salmo salar) smolts from anadromous and landlocked populations

机译:正常和内陆种群鲑鲑(Salmo salar)mol的基因表达比较

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We examined whether gene expression in the young salmon (Salmo salar) gill differs in relation to the salinity of their migration habitat by comparing three salmon stocks: (1) fish that migrate from a river system to Lake Saimaa, (2) fish that migrate to the brackish waters of the Baltic Sea, and (3) fish that migrate to the full-strength salinity of the Arctic Ocean. Transcripts of the gill tissue were measured at three successive developmental stages (parr, smolt and postsmolt) using the cDNA microarray in fish reared under common conditions. The changes in gene expression were qualitatively and quantitatively similar in the three stocks irrespective of the salinity of the natural growing habitat. This suggests that the parr-smolt transformation in the gill tissue of the landlocked fresh-water salmon stock is similar to the seawater migrating salmon. The transformation of the gill to a hypoosmotic organ in the freshwater salmon has been retained in evolution, possibly due to its adaptive role as a signal for migration from a relatively poor-growth environment of the river to a more productive lake habitat.
机译:我们通过比较三种鲑鱼种群来检查幼鲑(Salmo salar)ill中的基因表达是否与其迁移栖息地的盐度有关:(1)从河流系统迁移到赛马湖的鱼类,(2)迁移的鱼类到波罗的海的咸淡水,以及(3)迁移到北冰洋全强度盐度的鱼类。在普通条件下饲养的鱼中,使用cDNA微阵列在三个连续的发育阶段(measured,r和后and)测量measured组织的转录本。无论自然生长栖息地的盐度如何,三种种群中基因表达的变化在质量和数量上都相似。这表明内陆淡水鲑鱼种群g组织中的par-smolt转化与海水迁移鲑鱼相似。 fresh在淡水鲑鱼中向低渗器官的转化一直处于进化过程中,这可能是由于其具有适应性作用,可以作为从相对较差的河流环境迁移到生产力更高的湖泊栖息地的信号。

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