{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T10:43:38Z","timestamp":1785926618509,"version":"3.56.0"},"reference-count":56,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T00:00:00Z","timestamp":1785888000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["32560850"],"award-info":[{"award-number":["32560850"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["32360867"],"award-info":[{"award-number":["32360867"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"award":["32560850"],"award-info":[{"award-number":["32560850"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"award":["32360867"],"award-info":[{"award-number":["32360867"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>Broodiness is a natural behavior whereby female birds stop laying eggs to sit on and hatch them. This behavior is regulated through genetic, hormonal, and environmental factors. The Taihe Black-Boned Silky Fowl (TBSF), a Chinese traditional domestic breed, exhibits a strong brooding tendency; however, the molecular mechanisms underlying this trait remain unclear. In this study, we performed an integrated multi-omics analysis to characterize differences between two groups of TBSF hens: 8 individuals undergoing 30 days of active brooding (BR30) and 8 individuals in the normal laying egg stage (NB), selected from a total group of 230 hens. We combined 16S rRNA sequencing, untargeted metabolomics, and hepatic transcriptome sequencing, with statistical analyses including QIIME 1.9.1, OPLS-DA (VIP &gt; 1), Student\u2019s t-test (p \u2264 0.05), and DESeq2 (|log2FC| \u2265 1, FDR &lt; 0.05) for differentially expressed genes (DEGs), respectively, and Pearson\u2019s correlation analysis for multi-omics integration. Phenotypically, brooder hens showed significantly reduced feed intake, body weight, and main digestive tissue indices, alongside altered liver and blood biochemical parameters. Hepatic transcriptome analysis identified 1582 DEGs between groups, enriched in pathways related to fatty acid oxidation and the amino acid degradation pathway. In addition, 16S rRNA sequencing revealed distinct gut microbial community structures: the NB group was enriched in Bacilliota and Pseudomonadota, while the BR30 group was enriched in Spirochaetota and Synergistota. Metabolomic profiling identified a total of 143 differential metabolites, which were enriched in lipid and amino acid metabolites, including alpha-linolenic acid and pyruvate metabolites. Multi-omics correlation analysis revealed tight associations between gut microbial taxa, circulating metabolites, and hepatic gene expression. Specifically, beneficial lipid metabolites, including phospholipids, lysophosphatidylcholines, and sphingomyelins, were positively correlated with Synergistes and the Christensenellaceae R-7, as well as with key hepatic lipid metabolism genes FABP1, LPL, and FADS2. In summary, this study reveals that the gut\u2013liver axis plays a critical part in the modulation of energy metabolism during broodiness, and further highlights new insights into metabolic targets that could optimize reproductive behavior and enhance poultry production.<\/jats:p>","DOI":"10.3390\/ani16152416","type":"journal-article","created":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T09:16:22Z","timestamp":1785921382000},"page":"2416","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Integrated Multi-Omics Analysis Reveals Molecular Features Associated with Energy Metabolism Adaptations in Brooding Taihe Black-Bone Silky Fowls"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-9617-8456","authenticated-orcid":false,"given":"Ramlat Ali","family":"Haji","sequence":"first","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"},{"name":"Department of Animal Science and Aquaculture, School of Agriculture (SOA), State University of Zanzibar (SUZA), Zanzibar P.O. Box 146, Tanzania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Hu","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2387-1525","authenticated-orcid":false,"given":"Jiming","family":"Ruan","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-6225-3394","authenticated-orcid":false,"given":"Haiping","family":"Liang","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziyue","family":"Wan","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Salma Mbarouk","family":"Omar","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-5840-9816","authenticated-orcid":false,"given":"Qing","family":"Wei","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xianhua","family":"Xie","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanming","family":"Huang","sequence":"additional","affiliation":[{"name":"Taihe Aoxin Wuji Development Co., Ltd., Taihe 343700, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6623-2224","authenticated-orcid":false,"given":"Ji","family":"Cao","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-4267-9239","authenticated-orcid":false,"given":"Jianzhen","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Tan, Y., Huang, Y., Xu, C., Huang, X., Li, S., and Yin, Z. 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