Modeling Genetic Gain for Weaning Weight of Rhodope Tsigai Sheep

G. DIMOV1, D. VASSILEV1,V. KAFEDJIEV2 and E. KIPRIOTIS3

1 Institute of Animal Science, BG 2232 Kostinbrod, Bulgaria
2 Complex Experimental Station, BG 4700 Smolian, Bulgaria
3 Agricultural Experimental Station, GR 9100 Komotini, Greece

Abstract

DIMOV, G., D. VASSILEV, V. KAFEDJIEV and E. KIPRIOTIS, 2000. Modeling genetic gain for weaning weight of Rhodope Tsigai sheep. Bulg. J. Agric. Sci., 6: 201-207

The simulation study determined theoretical generation and year genetic gain for live weight at weaning of Tsigai sheep when two stage selection on rams was considered halfsib and progeny testing. Maximum increase of inbreeding per year was 0.0055, maximum year gain for weaning live weight was 514g. The most effective breeding system was found for 50% of ewes inseminated with young rams and the rest 50% with progeny tested rams.

Key words: breeding policy, selection intensity, generation interval, live weight, genetic gain, Tsigai sheep