{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T01:53:51Z","timestamp":1790906031420,"version":"4.1.0"},"reference-count":31,"publisher":"Asian Australasian Association of Animal Production Societies","issue":"10","license":[{"start":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T00:00:00Z","timestamp":1777334400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["32202659"],"award-info":[{"award-number":["32202659"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100011809","name":"Anhui Agricultural University","doi-asserted-by":"publisher","award":["rc392405"],"award-info":[{"award-number":["rc392405"]}],"id":[{"id":"10.13039\/501100011809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003995","name":"Natural Science Foundation of Anhui Province","doi-asserted-by":"publisher","award":["2508085QC096"],"award-info":[{"award-number":["2508085QC096"]}],"id":[{"id":"10.13039\/501100003995","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["animbiosci.org"],"crossmark-restriction":true},"short-container-title":["Anim Biosci"],"published-print":{"date-parts":[[2026,10,1]]},"abstract":"<jats:p>Objective: Indigenous chicken breeds have poorer reproductive performance than commercial laying hens. This study aims to elucidate the impact of abdominal fat deposition on the reproductive performance of indigenous chickens, providing a theoretical basis for the breeding of high-yielding chickens.Methods: A pure-bred dam line selected from Wannan yellow chickens at 60 wk of age was used to measure abdominal fat thickness using colored ultrasound. The hens were divided into two groups: high abdominal fat thickness (HF) and low abdominal fat thickness (LF). Egg production was recorded individually and compared in two connective generations. The concentrations of blood lipid, hatchability, and the expression of lipid synthesisrelated genes in various tissue were examined.Results: The abdominal fat and skin thickness were significantly greater in the HF group than that of the LF group. At 60 wk of age, the egg production of the LF group was significantly higher than that of the HF group in the two generations. Abdominal fat thickness ranging from 0.4 to 1.0 cm was associated with the highest egg production. The rate of healthy embryos was significantly reduced in the HF group. Serum VLDL was significantly higher in HF than that of the LF at all detection stages. The expression of genes related with fatty acid synthesis showed no significant differences between the liver and ovary in the two groups. However, the expression of ACACB, ITGAV and ZC3H12A was significantly lower in HF group than that of the LF group.Conclusion: The increased abdominal fat thickness of Wannan yellow chickens resulted in decreased egg production and hatchability during the late laying period (60 wk). Genes associated with fatty acid synthesis are expressed in abdominal fat, rather than in the liver, responsible for fat deposition in abdomen at the late 60 wk of age in chickens.<\/jats:p>","DOI":"10.5713\/ab.250869","type":"journal-article","created":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T08:38:17Z","timestamp":1777365497000},"page":"250869","update-policy":"https:\/\/doi.org\/10.5713\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["High abdominal fat deposition was regulated by abdominal fatty acid synthesis related genes and reduced reproduction in late stage of Chinese indigenous Wannan yellow chicken"],"prefix":"10.5713","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8969-6929","authenticated-orcid":true,"given":"Hailiang","family":"Yu","sequence":"first","affiliation":[{"name":"College of Animal Science and Technology, Anhui Agricultural University, Hefei, China"},{"name":"Anhui Province Key Laboratory of Local Livestock 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