20.500.12556/RUL-176916 Genetic parameters for growth traits in the Slovenian beef cattle population Ocena genetskih parametrov za lastnosti rasti v populaciji slovenskega mesnega goveda This study compared genetic parameter es-timates and correlations between estimated breeding values (EBVs) obtained using four single-trait animal models differ-ing in the definition of the common herd-time environmental effect. Analyses were based on field performance records for birth weight (BW), weight at 90 days (W90), and weight at 210 days (W210) in Charolais and Limousin calves born in Slo-venian suckler herds between 1990 and 2017. Model variants defined contemporary groups by herd only (H), or by herd combined with one-year (HY), two-year (HY2), or five-year (HY5) time periods. Heritability estimates varied across mod-els: for BW, direct h² ranged from 0.25 to 0.39, for W90 from 0.11 to 0.37, and for W210 from 0.34 to 0.57. Correspond-ing maternal h² ranged from 0.10 to 0.13 (BW), 0.12 to 0.18 (W90), and 0.20 to 0.29 (W210). The proportion of variance due to common herd-time effects ranged from 0.25 to 0.44, and EBV correlations between models ranged from 0.61 to 0.95. The HY2 model provided the most balanced partition-ing of phenotypic variance across traits and herds, providing the most practical solution for national genetic evaluations under the current data structure. V raziskavi smo primerjali ocene genetskih parametrov in korelacije med plemenskimi vrednostmi (PV), ocenjenimi s štirimi različnimi eno-lastnostnimi modeli živa-li, ki so se razlikovali v definiciji skupnega okoljskega vpliva črede skozi čas. Analize so temeljile na podatkih terenskih meritev za telesno maso ob rojstvu (BW), pri 90 dneh (W90) in pri 210 dneh starosti (W210) telet pasem šarole in limuzin, rojenih v slovenskih čredah krav dojilj med letoma 1990 in 2017. Primerjalne skupine so bile definirane kot: samo čre-da (H), ali čreda v kombinaciji z enoletnim (HY), dvoletnim (HY2) oziroma petletnim (HY5) časovnim obdobjem. Ocen-jeni dednostni deleži so bili: za BW 0,25–0,39 (direktni) in 0,10–0,13 (maternalni); za W90 0,11–0,37 in 0,12–0,18; za W210 0,34–0,57 in 0,20–0,29. Delež variance zaradi skupne-ga okoljskega vpliva črede je znašal 0,25–0,44, korelacije med PV različnih modelov pa 0,61–0,95. Model HY2 je zagoto-vil najbolj uravnoteženo razdelitev fenotipske variance med vplive in se je izkazal kot najustreznejša izbira za uporabo v nacionalnem genetskem vrednotenju pri obstoječi strukturi podatkov. beef cattle Charolais Limousin suckler cows growth traits genetic evaluation heritability models model comparison Slovenia mesno govedo pasme šarole limuzin dojilje lastnosti rasti genetika genetski parametri heritabiliteta modeli primerjava modelov Slovenija true false true Angleški jezik Slovenski jezik Članek v reviji 2025-12-15 08:48:14 2025-12-15 08:48:17 2026-01-07 04:28:46 0000-00-00 00:00:00 2025 0 0 10 str. no. 4 Vol. 121 12. 12. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-12-12 636.2 1854-1941 10.14720/aas.2025.121.4.13600 261321219 RAZ_Lustrek_Barbara_2025.pdf RAZ_Lustrek_Barbara_2025.pdf 1 6BEE48304C30F252A760B203A17A5E35 51cd2153cc9926575f98199be7d5dfad346a697b4b1dbfa8def7afa7d40cdfa1 bf2d4062-ead3-11f0-bf92-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=225006 https://journals.uni-lj.si/aas/article/view/13600 0 d0ff8d09-ead3-11f0-bf92-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=225007 Biotehniška fakulteta Acta agriculturae Slovenica 0 0 0