Estimates of genetic parameters for different body weights andmuscle and fat depths of Karayaka lambs

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dc.contributor.authorYüksel Aksoy
dc.contributor.authorZafer Ulutaş
dc.contributor.authorUğur Şen
dc.contributor.authorEmre Şirin
dc.contributor.authorAziz Şahin
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2016
dc.departmentNiğde ÖHÜ
dc.description.abstractIn the current paper the direct additive and maternal genetic effects on birth, weaning (at 90 days of age), and scanning (at 20 weeks of age) weights and muscle and fat depths of the ribeye area in Karayaka lambs were investigated. Analyses were carried out by the restricted maximum likelihood approach, fitting 6 animal models with various combinations of direct and maternal effects. The best model was chosen after testing for improvement in the log-likelihood values. Direct heritability (h2d) for all traits decreased when maternal genetic effects were included in the models. The maternal heritability (h2m) ranged from 0.15 to 0.22 for birth weight, from 0.04 to 0.14 for weaning weight, and from 0.08 to 0.16 for scanning weight. The effects of h2m on muscle depth and fat depth of the ribeye area were not considered due to their insignificance. The permanent environmental effect of the dam was significant for birth, weaning, and scanning weights. Moderate negative genetic correlations (ram) between the direct and maternal genetic effects were observed, which were significant for birth (–0.179 and –0.221), weaning (–0.310 and –0.415), and scanning (–0.116 and –0.141) weights. As a result, h2dand h2m can be used as selection criteria for birth, weaning, and scanning weights in Karayaka lambs.
dc.description.abstractIn the current paper the direct additive and maternal genetic effects on birth, weaning (at 90 days of age), and scanning (at 20 weeks of age) weights and muscle and fat depths of the ribeye area in Karayaka lambs were investigated. Analyses were carried out by the restricted maximum likelihood approach, fitting 6 animal models with various combinations of direct and maternal effects. The best model was chosen after testing for improvement in the log-likelihood values. Direct heritability (h2d) for all traits decreased when maternal genetic effects were included in the models. The maternal heritability (h2m) ranged from 0.15 to 0.22 for birth weight, from 0.04 to 0.14 for weaning weight, and from 0.08 to 0.16 for scanning weight. The effects of h2m on muscle depth and fat depth of the ribeye area were not considered due to their insignificance. The permanent environmental effect of the dam was significant for birth, weaning, and scanning weights. Moderate negative genetic correlations (ram) between the direct and maternal genetic effects were observed, which were significant for birth (–0.179 and –0.221), weaning (–0.310 and –0.415), and scanning (–0.116 and –0.141) weights. As a result, h2dand h2m can be used as selection criteria for birth, weaning, and scanning weights in Karayaka lambs.
dc.identifier.endpage20
dc.identifier.issn1300-0128
dc.identifier.issue1
dc.identifier.startpage13
dc.identifier.trdizinid213290
dc.identifier.urihttps://app.trdizin.gov.tr/makale/TWpFek1qa3dNQT09
dc.identifier.urihttps://hdl.handle.net/11480/2303
dc.identifier.volume40
dc.indekslendigikaynakTR-Dizin
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.relation.ispartofTurkish Journal of Veterinary and Animal Sciences
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectZiraat
dc.subjectSütçülük ve Hayvan Bilimleri
dc.titleEstimates of genetic parameters for different body weights andmuscle and fat depths of Karayaka lambs
dc.typeArticle

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