Effect of non-genetic and genetic factors on reproductive traits of sangamneri goats

The reproduction data of Sanganmeri goat available at All India Coordinated Research Project on Goat Improvement (Sangamneri field unit), M.P.K.V., Rahuri over a period of 13 years (2004–2016) were collected and subjected to least squares analysis. Effect of village cluster, year and season of birth/kidding and type of birth/kidding order as non-genetic factors and sire as genetic factor on reproduction traits were studied. Overall least-squares mean for age at maturity, age at first conception, age at first kidding, service period and kidding interval of Sangamneri doe were 260.73 ± 2.12, 307.20 ±3.92, 457.99±3.93, 121.79 ±5.27 and 272.74 ±5.31 days, respectively. The overall least-squares mean for number of kids per kidding of Sangamneri goat was 1.82 ±0.04. Twinning and sex ratio was of 62.05 per cent and 1: 0.99 noticed in different cluster and year of birth in Sangamneri goat. While all pre partum reproduction traits were significantly influenced by village cluster, year of birth, season of birth and sire except type of birth while the post partum reproduction traits significantly influenced by village cluster, year of birth, season of birth and kidding order. Genetic and phenotypic correlations among reproduction traits in Sangamneri goat were positive and significant (P< 0.01). Among the reproduction traits heritability for AFK, NOKB and AFC were 0.796 ± 0.16, 0.541 ±0.13 and 0.333 ± 0.11, respectively.