{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T17:26:12Z","timestamp":1783013172498,"version":"3.54.6"},"reference-count":45,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T00:00:00Z","timestamp":1782950400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Sichuan Provincial Key Laboratory of Fish Resources Conservation and Utilization in the Upper Reaches of the Yangtze River","award":["NJTCSC25-2"],"award-info":[{"award-number":["NJTCSC25-2"]}]},{"name":"Project of Original Innovation 2035","award":["YSCX2035-011"],"award-info":[{"award-number":["YSCX2035-011"]}]},{"name":"Sichuan Fresh Water Fish Innovation Team","award":["SCCXTD-2026-15"],"award-info":[{"award-number":["SCCXTD-2026-15"]}]},{"name":"Sichuan Zumuzu River Hydropower Development Company, Ltd.","award":["BL2023\/D-88"],"award-info":[{"award-number":["BL2023\/D-88"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biology"],"abstract":"<jats:p>Oocyte quality determines fertilization success during the reproductive period of fish and is affected by a key intrinsic factor: the level of lipid deposition in the yolk. In this study, lipidomics was used to characterize lipid profiles of adipose tissue, liver, serum and ovary to clarify divergent hepatic lipid allocation to fat depots versus ovary in Sichuan taimen (Hucho bleekeri). The results showed that glycerophospholipids (GPs) constituted the most diverse lipid class across all four tissues, with phosphatidylcholine (PC) being the most abundant in each tissue. Relative to adipose tissue, liver, and serum, the ovary exhibited significant enrichment of PC and phosphatidylethanolamine (PE) and higher accumulation of docosahexaenoic acid (DHA)- and arachidonic acid (ARA)-containing GPs and triacylglycerols (TGs), as well as enrichment in TGs, diacylglycerols (DGs), and cardiolipin (CL), compared to adipose tissue. The expression levels of fads6, elovl2, elovl5, dgat1b, dgat2, ppar\u03b1, nfyb, and fabp7 were higher in the liver, while lpcat1 was highly expressed specifically in the ovary. The results of this study demonstrate that long-chain polyunsaturated fatty acids (LC-PUFAs) exhibited selective enrichment in the ovary, which facilitates yolk lipid deposition and provides structural and energetic support for oocyte development and early embryonic development. From a lipidomic perspective, this study reveals the regulatory characteristics underlying ovarian yolk deposition in H. bleekeri, providing important evidence for understanding the mechanisms of egg quality formation as well as a theoretical basis for broodstock management, artificial propagation, and the improvement of egg and larval quality.<\/jats:p>","DOI":"10.3390\/biology15131059","type":"journal-article","created":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T15:52:24Z","timestamp":1783007544000},"page":"1059","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Selective Allocation of LC-PUFA-Containing Lipids During Vitellogenesis in Female Sichuan Taimen (Hucho bleekeri): Implications for Female Broodstock Rearing During Artificial Propagation"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-7252-3966","authenticated-orcid":false,"given":"Qinyao","family":"Wei","sequence":"first","affiliation":[{"name":"Fisheries Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611730, China"},{"name":"Key Laboratory of Bio-Resources and Eco-Environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yeyu","family":"Chen","sequence":"additional","affiliation":[{"name":"Fisheries Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611730, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fubin","family":"Wang","sequence":"additional","affiliation":[{"name":"Sichuan Zumuzu River Hydropower Development Company, Ltd., Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Shao","sequence":"additional","affiliation":[{"name":"Sichuan Zumuzu River Hydropower Development Company, Ltd., Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongshen","family":"Ru","sequence":"additional","affiliation":[{"name":"Power China Hydropower Development Group Co., Ltd., Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huanchao","family":"Yang","sequence":"additional","affiliation":[{"name":"Fisheries Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611730, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Du","sequence":"additional","affiliation":[{"name":"Fisheries Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611730, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhaobin","family":"Song","sequence":"additional","affiliation":[{"name":"Key Laboratory of Bio-Resources and Eco-Environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenming","family":"Lai","sequence":"additional","affiliation":[{"name":"Power China Hydropower Development Group Co., Ltd., Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hua","family":"Li","sequence":"additional","affiliation":[{"name":"Fisheries Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611730, China"},{"name":"Fishes Conservation and Utilization in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Chengdu 611730, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,2]]},"reference":[{"key":"ref_1","unstructured":"Song, Z. 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