In an on-farm study of crossbreeding Baruwal with Border Leicester to improve the productive performance of sheep under a transhumance system in the high hills of Nepal, 362lambs, comprising 173 Baruwal and 189 25% Border Leicester (BL) x 75% Baruwal crossbred lambs born from Baruwal ewes from the year 1991 to 1993 period, were considered. Baruwal and the BL crossbred lambs weighed 2.44±0.09 and 2.87±0.09 kg respectively at birth whilst their body weights at 12 month age were 19.99±0.20 and 20.91±0.21 kg with an average daily weight gain of 47.6±0.6 and 49.2±0.6 g/day respectively. The weight of lambs at birth were significantly influenced by genotype, sex and year of birth (P<0.05) but not by the season of birth whilst their .bodyweight at one year of age differed significantly  with genotype, year  and season  of birth (P<0.05) but not with sex.   Quadratic regression analysis of monthly bodyweights of lambs revealed significantly higher growth rate .(P<0.001) in the BL crossbred than in the Baruwal, whilst the average daily gain in lamb weight over a period of one year age was likewise significant across the genotype  (P<0.01), year  and season of their births (P<0.001).   The greasy fleece weight at one year of age of the crossbred lambs (550.3±25.4 g) was significantly higher than that of the Baruwal lambs (P<0.00J), which was 459.4±23.3 g.  The mortality rate was 11.6% in Baruwal and. 17.5% in the crossbred lambs up to one year of their age.  Logistic regression analysis showed that the effect of year of birth on lamb mortality was significant (P<0.001), but the effect of other factors was not significant.

In an on-farm study of crossbreeding Baruwal with Border Leicester to improve the productive performance of sheep under a transhumance system in the high hills of Nepal, 362lambs, comprising 173 Baruwal and 189 25% Border Leicester (BL) x 75% Baruwal crossbred lambs born from Baruwal ewes from the year 1991 to 1993 period, were considered. Baruwal and the BL crossbred lambs weighed 2.44±0.09 and 2.87±0.09 kg respectively at birth whilst their body weights at 12 month age were 19.99±0.20 and 20.91±0.21 kg with an average daily weight gain of 47.6±0.6 and 49.2±0.6 g/day respectively. The weight of lambs at birth were significantly influenced by genotype, sex and year of birth (P<0.05) but not by the season of birth whilst their .bodyweight at one year of age differed significantly  with genotype, year  and season  of birth (P<0.05) but not with sex.   Quadratic regression analysis of monthly bodyweights of lambs revealed significantly higher growth rate .(P<0.001) in the BL crossbred than in the Baruwal, whilst the average daily gain in lamb weight over a period of one year age was likewise significant across the genotype  (P<0.01), year  and season of their births (P<0.001).   The greasy fleece weight at one year of age of the crossbred lambs (550.3±25.4 g) was significantly higher than that of the Baruwal lambs (P<0.00J), which was 459.4±23.3 g.  The mortality rate was 11.6% in Baruwal and. 17.5% in the crossbred lambs up to one year of their age.  Logistic regression analysis showed that the effect of year of birth on lamb mortality was significant (P<0.001), but the effect of other factors was not significant.