Genetic evaluation of Frieswal bulls under farm and field conditions

The present investigation was undertaken to determine the genetic worth of Frieswal bulls under farm and field conditions and to asses their rankings in both production systems. The average offirst lactation milk yield in crossbred cows was 2818±47 kg at Military Farms (Frieswal) and 2489±66 kg at f...

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Bibliographic Details
Published in:Indian journal of animal sciences 2008-02, Vol.78 (2)
Main Authors: Gaur, G.K, Kumar, Arun, Beniwal, B.K, Praveen
Format: Article
Language:English
Subjects:
BOVIN
CAMPO
CATTLE
CHAMP
CONCENTRACION DE EXPLOTACIONES
FARM AMALGAMATIONS
FIELDS
FUSION D'EXPLOITATIONS AGRICOLES
GANADO BOVINO
http://www.fao.org/aos/agrovoc#c_1391
http://www.fao.org/aos/agrovoc#c_2793
http://www.fao.org/aos/agrovoc#c_2894
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Summary:The present investigation was undertaken to determine the genetic worth of Frieswal bulls under farm and field conditions and to asses their rankings in both production systems. The average offirst lactation milk yield in crossbred cows was 2818±47 kg at Military Farms (Frieswal) and 2489±66 kg at field units. Best linear unbiased prediction (BLUP) estimates of the sires ranged from 2664±72 to 3076±99 kg (accuracy from 0.50 to 0.95) under farm conditions and from 2422±130 to 2633±117 kg (accuracy from 0.53 to 0.88) under field. conditions. The product moment correlation (-o.098±O.23) between breeding values of bulls for first lactation milk yield· under farm and field conditions was negative, very low and nonsignificant. The corresponding rank correlation (-0.12) was also negative, low and nonsignificant. The results revealed that bulls with higher ranks for milk production under farm conditions did not retain their superiority undl field conditions. Therefore, top ranked Frieswal bulls tested under farm conditions cannot be recommended for their use in field conditions.
ISSN:0367-8318