青海省冷水资源丰富，是全国最大的鲑鳟鱼产地，主要养殖对象为三倍体虹鳟。如何根据高原特殊的环境条件，采用科学途径生产出高品质的三倍体虹鳟已成为青海省鲑鳟鱼养殖业可持续发展必须解决的关键科学技术问题。作为多脂鱼，虹鳟能够将大量脂肪储存在肌肉中。研究表明，肌肉脂肪沉积是影响鱼类品质的主要因素之一，而高原条件下养殖三倍体虹鳟肌肉脂肪沉积与品质的关联性尚不清楚，其调控机理尚不明确。因此，本研究拟以高原养殖三倍体虹鳟为研究对象，分别研究饲料脂肪水平和脂肪酸组成对三倍体虹鳟脂肪沉积及品质的影响，结合多元统计分析法系统研究肌肉脂肪沉积与品质之间的内在联系。在此基础上，运用分子生物学的研究方法从脂肪沉积调控的角度探究脂肪相关品质指标的营养调控机制。为三倍体虹鳟品质调控技术的建立提供理论资料，并为我国鲑鳟鱼养殖业的可持续发展提供基础数据。

Qinghai province possesses abundant cold-water resource and has been the largest trout aquaculture base in China. Especially, triploid rainbow trout is the main cultured species. How to improve the quality of triploid trout in a scientific way has been the key question need to be answered for the sustainable development of the industry. As a fatty fish, rainbow trout can store a lot of lipid in muscle. Studies showed that muscle lipid deposition is of major importance for the quality of fish, however, the effects of muscle lipid deposition on the fillet quality and its regulation mechanism in farmed triploid rainbow trout on plateau are still unknown. Thus, the project is expected to study the effects of dietary lipid levels and fatty acids composition on muscle lipid deposition and fillet quality of triploid trout, and to clarify the relationship between muscle lipid and fillet quality by using multivariate statistical analysis. Then, the nutritional regulation mechanism of muscle lipid deposition related quality parameters will be investigated by using approach of molecular biology. Based on the present study, it is expected to provide the theory and data supports for regulating the quality of triploid trout and sustainable development of trout culture on Qinghai-Tibet Plateau.