Pregledni rad
METHODS OF EVAULATION AND MEASURING OF EWE UDDER MORPHOLOGY TRAITS
Z. Prpić
; Agronomski fakultet Sveučilišta u Zagrebu, Hrvatska
B. Mioč
; Agronomski fakultet Sveučilišta u Zagrebu, Hrvatska
Vesna Pavić
; Agronomski fakultet Sveučilišta u Zagrebu, Hrvatska
I. Vnučec
; Agronomski fakultet Sveučilišta u Zagrebu, Hrvatska
Sažetak
Recently, in countries with high sheep milk production interest has been increasing functional traits such as udder morphology. The first practical utilization of udder morphology on dairy sheep was made using tables of udder typology. Classification by types is at disadvantage because BLUP methods are less suited for estimating genetic values for the non-continuous traits involved in these analyses. With the increasing implementation of milking machines, a subjective appraisal of some elementary udder traits (udder depth, teat angle, teat length, udder shape) on the basis of a linear scale was implemented. Different authors have undertaken the use of objective measurements for the characterization of the dairy sheep udder and for the study of the relations with milk yield or other productive traits since the development of machine milking. The use of objective measurements is based on several measures performed directly on each animal and as a consequence it shows some drawbacks such as low speed, laboriousness and expense in personnel making its application infeasible for commercial farms.
Ključne riječi
udder morphology; sheep milk; milking
Hrčak ID:
23842
URI
Datum izdavanja:
14.5.2008.
Posjeta: 1.024 *