Problems in cow evaluation and current use of cow index. Report of a working group on cow evaluation
| Autor: | J. Philipsson, L. Gjøl-Christensen, A. E. McClintock, J. Dommerholt, J.C. Mocquot, E. Fimland, C. Gaillard, J. Lederer |
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| Přispěvatelé: | Revues Inra, Import, ProdInra, Migration |
| Jazyk: | angličtina |
| Rok vydání: | 1978 |
| Předmět: |
Index (economics)
lcsh:QH426-470 040301 veterinary sciences [SDV]Life Sciences [q-bio] Population [SDV.GEN.GA] Life Sciences [q-bio]/Genetics/Animal genetics Biology 0403 veterinary science Statistics Genetics Genetics(clinical) education Selection (genetic algorithm) Ecology Evolution Behavior and Systematics ComputingMilieux_MISCELLANEOUS Mathematics lcsh:SF1-1100 2. Zero hunger education.field_of_study General Veterinary Group (mathematics) Research 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science [SDV] Life Sciences [q-bio] lcsh:Genetics [SDV.GEN.GA]Life Sciences [q-bio]/Genetics/Animal genetics 040103 agronomy & agriculture Herd Related research 0401 agriculture forestry and fisheries Animal Science and Zoology lcsh:Animal culture Genetic merit |
| Zdroj: | Annales de génétique et de sélection animale Annales de génétique et de sélection animale, INRA Editions, 1978, 10, pp.136 Annales de génétique et de sélection animale, INRA Editions, 1978, 10 (1), pp.135-136 Annales de Génétique et de Sélection Animale Genetics Selection Evolution, Vol 10, Iss 1, Pp 135-136 (1978) 28ème Réunion Annuelle de la Fédération Européenne de Zootechnie 28ème Réunion Annuelle de la Fédération Européenne de Zootechnie, Aug 1977, Bruxelles, Belgium Livestock Production Science Livestock Production Science, Elsevier, 1978, 5, pp.3-18 |
| ISSN: | 0301-6226 |
| Popis: | A survey has been made by the study group of present utilization of cow indices that are considered important for efficient cow selection. Among other problems the following are considered most important and should therefore receive greater attention in index constructions and related research: • - the aggregate genotype should be properly and equally defined for both cows and bulls when calculating the index weightings for different sources of information; • - the effects of expressing yield in absolute vs relative terms at various yield levels: • - methods of evaluating the genetic merit of the individual herds and considering the genetic trend of the population; • - comparing the effects of different methods of adjustment for environmental factors including construction of herd average; • - the effects of environmental correlations between the cow and her dam; • - ways of testing the efficiency of different cow index constructions. |
| Databáze: | OpenAIRE |
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