Genetic evaluation of growth rate and efficiency-related traits in Dorper × local crossbred sheep population

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dc.creatorYeshaw, Shanbel
dc.creatorGoshme, Shenkute
dc.creatorAbebe, Aschalew
dc.creatorBisrat, Asfaw
dc.creatorAbebe, Ayele
dc.creatorZewdie, Tesfaye
dc.creatorAreaya, Alemnew
dc.creatorAlemayehu, Liulseged
dc.creatorKebede, Ashenafi
dc.creatorGetachew, Tesfaye
dc.date2025-01-14T20:21:00Z
dc.date2025-01-14T20:21:00Z
dc.date.accessioned2026-06-27T14:24:19Z
dc.descriptionThe present study was carried out to estimate genetic and phenotypic parameters for growth rate and efficiency-related traits in Dorper crossbred sheep population. Data on body weight collected from 2012 to 2021 at Debre Birhan Agricultural Research Center, Amhara Regional State, Ethiopia, were used to estimate phenotypic and genetic parameters for daily gain from birth to weaning (DG0-3), daily gain from weaning to 6 months (DG3-6), and daily gain from 6 months to yearling (DG6-12) and corresponding Kleiber ratios (KR0-3, KR3-6, KR6-12), efficiency of growth (GE0-3, GE3-6, GE6-12), and relative growth rate (RG0-3, RG3-6, RG6-12). Genetic parameters were estimated by restricted maximum likelihood (REML) procedure fitting six different univariate animal models and the most appropriate model for each trait was determined by log-likelihood ratio test. Multivariate analysis was carried out to estimate correlations between traits. Year and season of birth had a significant effect (p<0.001) in all studied traits. Direct heritability estimates for DG0-3, DG3-6, DG6-12, KR0-3, KR3-6, KR6-12, GE0-3, GE3-6, GE6-12, GR0-3, GR3-6, and GR6-12 were 0.45±0.15, 0.04±0.06, 0.15±0.11, 0.30±0.08, 0.13±0.11, 0.14±0.12, 0.34±0.15, 0.39±0.17, 0.31±0.14, 0.25±0.08, 0.23±0.13, and 0.23±0.13 respectively. Genetic correlation estimates between DG3-6 and other traits were positive and high in magnitude to their respective growth phase (0.95, 0.86, and 0.91 for KR3-6, GE3-6, and GR3-6 respectively). As the Dorper crossbred sheep are reaches market weight at about 6 months of age, focusing on improving traits measured during weaning to 6 months of age is more feasible. Selection based on DG3-6 is recommended to improve efficiency-related traits.
dc.identifierhttps://hdl.handle.net/10568/169019
dc.identifier.urihttp://hdl.handle.net/123456789/78729
dc.languageen
dc.publisherSpringer (part of Springer Nature)
dc.rightsLimited Access
dc.sourceShanbel Yeshaw, Shenkute Goshme, Aschalew Abebe, Asfaw Bisrat, Ayele Abebe, Tesfaye Zewdie, Alemnew Areaya, Liulseged Alemayehu, Ashenafi Kebede, Tesfaye Getachew. (24/6/2024). Genetic evaluation of growth rate and efficiency-related traits in Dorper × local crossbred sheep population. Tropical Animal Health and Production, 55.
dc.subjectheritability
dc.subjectgenetic correlation
dc.subjectgenetic parameter
dc.subjectefficiency-related traits
dc.subjectadditive coefficient of variation
dc.titleGenetic evaluation of growth rate and efficiency-related traits in Dorper × local crossbred sheep population
dc.typeJournal Article

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Centro Internacional para la Investigación Agrícola en las Áreas Secas (ICARDA)