Perusteluja pässien fenotyyppitestaukselle

Authors

• Mikko Varo Helsingin Yliopisto, kotieläinten jalostustieteen laitos
• Tapani Hellman Helsingin Yliopisto, kotieläinten jalostustieteen laitos

DOI: https://doi.org/10.23986/afsci.71910

Abstract

On the basis of the results of the growing experiments made with young rams in 1965—66 the possibilities to estimate the quantity of meat and meatiness have been studied according to caracteristics which have been or can be measured also in living animals. For this reason in parallell with the measures of the living animals also some measures of carcass, fulfilling the above condition, have been used: the crossectional area of the m.l.d. can be obtained by an ultrasonic measurement, the circumference of the part of chump can be given as the circumference of the thigh, and the head weight can be substituted by the measured size of the head. It can be expected according to the results of the stepwise multiple regression analysis that the amount of meat produced can be estimated in phenotype testing primarily using live weight, the crossectional area of the m.l.d. and the circumference of the thigh. The same qualities give also a satisfactory estimate of the meatiness. In the progeny testing, used in control of phenotype testing, the carcass weight alone is a sufficient measure for the estimation of meat yield. In case it is desirable to emphasice meatiness in the progeny testing, this can be completed with the points of the carcass, circumference of the part of chump and the crossectional area of m.l.d.