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Estimation of economic weights for a selection index for Corriedale sheep in Magallanes






Avances en Produccion Animal 17(1-2): 123-126

Estimation of economic weights for a selection index for Corriedale sheep in Magallanes

A method used to estimate the economic weight of clean fleece weight, fibre diameter and body weight of lambs and ewes in southern Chile is described.


Accession: 002373182



Related references

Cvitanio, M.-S.L.torre, V.-E.M.turana, W., H., 1978: A survey on mating weights, lambing percentage at docking and reproductive management of Corriedale sheep in continental Magallanes. Agricultura tecnica 38(4): 150-155

Cheong, I.C.; Chung, S.B.; Park, Y.I.; Ohh, B.K., 1987: Study on estimation of genetic parameters and selection index for hatching time body weights and body measurements in maternal lines of broiler breeders 2. estimation of selection index and expected genetic gain. This study was conducted to estimate the genetic gains and the efficiency of selection expected from the selection indexes obtained from the genetic parameters estimated. Different selection indexes including the hatching time, body weight, keel l...

Crempien L.C.; Barria P.N.; Kusanovic M.S., 1988: Fertility and growth in a population of improved Corriedale sheep in Magallanes. Data on 415 ewes in 13 flocks, aged 18 months and mated with 7 rams, were analysed. Of ewes mated, 72.3% conceived, the fertility of rams ranging from 57.6 to 80.4% (P<0.05). Of 298 lambs born, 149 were [male][male]. Lamb birth weight averaged...

Bennett, G.; Dickerson, G.; Tess, M.; Hruska, R., 1980: Determining economic weights for selection index equations from simulation models and selection experiments. Journal of animal science1(1): 113

Ramon, M.; Legarra, A.; Perez Guzman, M.D.; Ugarte, E., 2005: Technical and economic analysis of Latxa and Manchega dairy sheep farms previous to estimation of economic weights. Economic and productive data from Latxa and Manchega flocks are presented as a previous step to obtain economics weights. This work shows that the main problems are to record economic data and the variability between breeds. Total costs in Mancheg...

Crempien L.C.; Barria P.N.; Kusanovic M.S., 1988: Fertility and growth parameters in a sheep improvement group for the corriedale breed in magallanes chile. Agricultura Tecnica (Santiago) 48(1): 14-21

Uzik, M.; Zofajova, A., 1991: The estimation of economic weights for selection indices. In an evaluation of 8 yield-related traits in 22 spring barley genotypes, analyses of variance and covariance were performed, and expected and realized genetic gains from index and direct selection were compared using various methods for determini...

Smith C., 1982: The effects of changes in economic weights on the efficiency of index selection. Journal of Animal Science 55(SUPPL 1): 81-82

Sharma, R.; Dev-Roy, A.; Singh, B.; Johari, D., 1986: Influence of economic weights on the efficiency of index selection. Indian journal of poultry science: official journal of the Indian Poultry Science Association 21(4): 339-340

Smith, C., 1983: Effects of changes in economic weights on the efficiency of index selection. Several authors have concluded that the efficiency of index selection is not very sensitive to changes in economic weights. In a reappraisal of the problem, using larger changes in the economic weights, it is shown that considerable losses in effi...