{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T07:51:41Z","timestamp":1791359501838,"version":"4.3.1"},"reference-count":64,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:00:00Z","timestamp":1791331200000},"content-version":"vor","delay-in-days":279,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Animal Science Journal"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Semen production traits are key indicators of reproductive performance in pigs. Their genetic architecture, particularly the contribution of the X\u2010chromosome and non\u2010additive genetic effects, remains poorly understood. We investigated contributions of the X\u2010chromosome and non\u2010additive genetic effects to semen production traits in Duroc boars using genetic parameter estimation and genome\u2010wide association studies (GWAS). Overall, 13,788 records from 502 Duroc boars genotyped with high\u2010density single\u2010nucleotide polymorphism (SNP) arrays were analyzed for semen volume (VOL), sperm number (NUM), sperm concentration (CON), and the proportion of morphologically abnormal sperm (PAS). Genetic parameters were estimated using pedigree\u2010 and SNP\u2010based repeatability animal models. A GWAS was performed using 40,197 SNPs on the autosomal chromosomes and 1521 on the X chromosome. The results of pedigree\u2010based analyses indicated that permanent environmental effects substantially contributed to repeatability. The SNP\u2010based analyses revealed that epistatic effects accounted for a large proportion of the variance in NUM and PAS, whereas their contributions were limited for VOL and CON. The X\u2010chromosome effects explained little phenotypic variance across all traits. No significant loci were detected in the GWAS using additive models; no substantial X\u2010linked associations were identified. A significantly associated SNP with NUM on chromosome 1 (rs80957931) was identified in the non\u2010additive model.<\/jats:p>","DOI":"10.1111\/asj.70248","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T07:10:57Z","timestamp":1791357057000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Genetic Architecture of Semen Production Traits in Duroc Boars Accounting for X\u2010Chromosome and Non\u2010Additive Genetic Effects"],"prefix":"10.1111","volume":"97","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1540-6970","authenticated-orcid":false,"given":"Youngjae","family":"Choi","sequence":"first","affiliation":[{"name":"Graduate School of Agricultural Science Tohoku University  Sendai Miyagi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keiichi","family":"Suzuki","sequence":"additional","affiliation":[{"name":"Graduate School of Agricultural Science Tohoku University  Sendai Miyagi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akira","family":"Yobuko","sequence":"additional","affiliation":[{"name":"Frieden Co. 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