Optimization of alternative breeding schemes for the genetic improvement of common Tigray highland sheep in northern Ethiopia

Table 3 Predicted genetic gains of the breeding traits under different breeding schemes

Parameters	Village-based breeding schemes		Central open nucleus-based breeding scheme
Parameters	Scheme 1	Scheme 2	Scheme 3	Scheme 4
Breeding objective	10.657	13.732	30.403	29.063
SMW (kg)	0.2879	0.3708	0.8207	0.7849
ADG (3–6 month) (kg)	0.0010	0.0010	0.002	0.0019
Litter size	0.0030	0.0040	0.0086	0.0081
PWLS (0–3 months)	0.0020	0.0024	0.0054	0.0051

SMW 6 month weight, ADG average daily gain in kg (3–6 month), PWLS pre-weaning lamb survival rate (0–3 month)

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