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Variance component ...
Variance component and breeding value estimation for genetic heterogeneity of residual variance in Swedish Holstein dairy cattle
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- Rönnegård, Lars (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Högskolan Dalarna,Statistik,Swedish Univ Agr Sci, Dept Anim Breeding & Genet, S-75007 Uppsala, Sweden,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
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- Felleki, Majbritt (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Högskolan Dalarna,Statistik,Swedish Univ Agr Sci, Dept Anim Breeding & Genet, S-75007 Uppsala, Sweden,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
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- Fikse, Freddy (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
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Mulder, H. A. (författare)
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- Strandberg, Erling (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
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(creator_code:org_t)
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- Elsevier, 2013
- 2013
- Engelska.
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Ingår i: Journal of Dairy Science. - : Elsevier. - 0022-0302 .- 1525-3198. ; 96:4, s. 2627-2636
- Relaterad länk:
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http://www.journalof...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- Trait uniformity, or micro-environmental sensitivity, may be studied through individual differences in residual variance. These differences appear to be heritable, and the need exists, therefore, to fit models to predict breeding values explaining differences in residual variance. The aim of this paper is to estimate breeding values for micro-environmental sensitivity (vEBV) in milk yield and somatic cell score, and their associated variance components, on a large dairy cattle data set having more than 1.6 million records. Estimation of variance components, ordinary breeding values, and vEBV was performed using standard variance component estimation software (ASReml), applying the methodology for double hierarchical generalized linear models. Estimation using ASReml took less than 7 d on a Linux server. The genetic standard deviations for residual variance were 0.21 and 0.22 for somatic cell score and milk yield, respectively, which indicate moderate genetic variance for residual variance and imply that a standard deviation change in vEBV for one of these traits would alter the residual variance by 20%. This study shows that estimation of variance components, estimated breeding values and vEBV, is feasible for large dairy cattle data sets using standard variance component estimation software. The possibility to select for uniformity in Holstein dairy cattle based on these estimates is discussed.
Ämnesord
- NATURVETENSKAP -- Matematik -- Sannolikhetsteori och statistik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Probability Theory and Statistics (hsv//eng)
- LANTBRUKSVETENSKAPER -- Bioteknologi med applikationer på växter och djur -- Genetik och förädling inom lantbruksvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agricultural Biotechnology -- Genetics and Breeding in Agricultural Sciences (hsv//eng)
Nyckelord
- dairy cattle
- genetic heterogeneity
- milk yield
- somatic cell score
- Complex Systems – Microdata Analysis
- Komplexa system - mikrodataanalys
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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