Comparative Performance of Indigenous Crossbreds of Goats at Lumle Farm, Nepal
AbstractA study was undertaken to investigate the effect of genotype, sex, year and season of birth on the performance of Khari goats and Khari x Sinhal crossbreds maintained at the Lumle Farm, Kaski, Nepal. Khari females and Sinhal bucks were collected from various parts of the western hills and crossbreds (Khari x Sinhal) were produced at the farm. Initial objective was to explore the possibility of improving genetic potential by utilizing the local genotypes. Observations were also made across sex, year and season of birth efect. Birth weight was significantly affected (p<0.01) by the sex, year and season of birth but not by the genotype (p>0.05). Average birth weight of Khari kids and Khari x Sinhal crossbreds were 2.03 and 2.14 kg respectively whereas that of male and female kids was 2.01 and 2.16 kg respectively. Kids born during monsoon were lagest whereas those born during summer were smallest. Autumn and winter born kids were similar in size and were intermediate between monsoon and summer born kids. Body weight of kids in different ages was significantly affected by genotype, sex and year of birth but not by the season of birth. Body weights of Khari x Sinhal crossbreds at 3 months (p<0.01) and 6 months (p<0.05) of age were significantly higher than that of Khari kids. When the kids were 9 months old body weight of both the genotypes was similar and not significantly different (p>0.05). However, it was overtaken by Khari kids when they reached a year of age (p<0.01). Female kids were significantly lager (p<0.05) in size up to 6 months of age but there was no significant difference in weight after 9 months of age between the two sexes. There was no specific pattern with regards to the effect of year on body weight.Age at first service was significantly affected by genotype (p<0.01) which was 229.2 and 367.6 days respectively for Khari and Khari x Sinhal crossbred but not by any other factors considered. Autumn born kids had a tendency of coming into first service earlier than the kids born in other seasons. First kidding interval was not affected by genotype, year and season of birth. Like the case with age at first service, autumn born kids had a tendency of having shorter first kidding interval.Twinning percentage in the second kidding was not significantly affected by the genotype. It was 27.07 and 19.05% for Khari and Khari x Sinhal respectively. The mortality of Khari kids (25.9%) up to 6 months of age was significantly higher (p<0.05) than that of Khari x Sinhal kids (14.3%). In conclusion, cross breeding of Khari x Sinhal goats could not show much of comparative advantage between the two genotypes under on-station management at Lumle Farm.
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