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A genetic study of some factors affecting milk yield in ewes. 2. Environmental factors



A genetic study of some factors affecting milk yield in ewes. 2. Environmental factors



2nd World Congress on Genetics applied to Livestock Production, 4th-8th October 1982-8 Symposia 2: 748-752



2951 lactation records of Churro ewes in 3 flocks were analysed. Parity had a significant effect on milk yield, accounting for 3.4% of the total variation, with ewes in their 3rd and later lactations having the highest yields. Year of lambing had a highly significant effect on milk yield, and accounted for 13.5% of the total variation. Ewes rearing twins produced an average of 12 kg milk per lactation more than females rearing single lambs.

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