The Heritability And The Economic Importance Of Nipple Numbers In Swine At The University Of Ibadan

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Date
1973
Authors
Oluyemi J. A.
Ebun Babatola
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Abstract
By the method of intra-sire regesion of offspring on dam, the heritability estimates of nipple numbers reported by Allen, Tribble and Lansley (1959) ranged from - 0.24 per cent to 59 per cent for pigs of different genotypes including Landrace and Poland breeds and their crosses. The heritability estimates of Du;'oc and Yorkshire were respectively 0.18 ± 0.08 and \.00 + 0.18 obtained by Alehwede and Robinson (1965) using the method of paternal half-sib correlation. Dam-offspring regression and paternal half• sib correlation methods yielded heritabity estimates which were 0.01 ~ 0.04 and 0.23 ± 0.20 respectively for Minnesota No. I. (Enfield and Rampel, 1961).
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East African Agricultural And Forestry Journal, XXXVIII (NO.3), p. 215-217