The estimation of (co)variance components growth, reproduction, carcass, FECS and FECN traits in Lleyn sheep

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dc.authorid0000-0003-2862-7369
dc.contributor.authorCeyhan, Ayhan
dc.contributor.authorMoore, Kirsty
dc.contributor.authorMrode, Raphael
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2015
dc.departmentNiğde ÖHÜ
dc.description.abstractGenetic parameters for weaning live weight and ultrasound scanning measurements were estimated from performance recorded UK Lleyn sheep. The data for the study were collected from conventional hill and low land farming systems. The data were from 48,277 lambs. Genetic parameters were estimated using uni- and bivariate animal models for weight at birth (BWT), live weight at 8 weeks (8WK), ultrasound scanning at 21 weeks of age (SVVT) and weight at tupping (MW), ultrasound scanned muscle (MD) and fat (FD) depth measured at 21 weeks of age, litter size born (LSB), litter size reared (LSR), faecal egg count for strongyle (FECS) and nematodes (FECN). Maternal genetic effects were fitted for BWT, and 8WK. Direct heritability estimates were 0.14 +/- 0.01 for BWT, 0.35 +/- 0.02 for 8WK, 0.46 +/- 0.01 for SWT, 0.31 +/- 0.01 for MD, 0.38 +/- 0.01 for FD, 0.38 +/- 0.01 for MW, 0.22 +/- 0.09 for FECs and 0.16 +/- 0.10 for FECN. Maternal heritability estimates were 0.14 +/- 0.01 for BWT and 0.11 +/- 0.01 for 8WK. Direct genetic correlations among studied traits ranged from 0.05 (MW-FD) to 0.90 (SWT-8WK). Phenotypic and environmental correlation estimates were generally lower than those of genetic correlation. Our results indicate that the genetic parameters generated in this study could be used in selection index calculations to asses the benefits of including lamb carcass traits in future selection programmes for Lleyn sheep. Also, this study provides valuable information in terms of genetic parameters for growth and carcass traits which can be used for genetic evaluation and in designing selection programmes for the Lleyn breed. (C) 2015 Elsevier B.V. All rights reserved.
dc.description.sponsorshipTurkish Council of Higher Education
dc.description.sponsorshipThe authors gratefully acknowledge and thank Signet Breeding Services for the use of the Lleyn data for this analysis and Turkish Council of Higher Education for funding the scientific and technical visit to Scotland.
dc.identifier.doi10.1016/j.smallrumres.2015.07.024
dc.identifier.endpage34
dc.identifier.issn0921-4488
dc.identifier.issn1879-0941
dc.identifier.scopus2-s2.0-84956606824
dc.identifier.scopusqualityQ2
dc.identifier.startpage29
dc.identifier.urihttps://dx.doi.org/10.1016/j.smallrumres.2015.07.024
dc.identifier.urihttps://hdl.handle.net/11480/3867
dc.identifier.volume131
dc.identifier.wosWOS:000363346600007
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofSMALL RUMINANT RESEARCH
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectLleyn sheep
dc.subjectAnimal model
dc.subjectGenetic parameters
dc.subjectLamb weights
dc.subjectUltrasound measurements
dc.titleThe estimation of (co)variance components growth, reproduction, carcass, FECS and FECN traits in Lleyn sheep
dc.typeArticle

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