GENETIC AND ENVIRONMENTAL RELATIONSHIP AMONG TESTICULAR MEASUREMENTS AND BODY-WEIGHT OF ARABI LAMBS AT DIFFERENT AGES

Body weights and testicular measurements, viz, length, width, depth an d scrotal circumference of Arabi male lambs (150) were taken at birth and then at monthly intervals up to 6 months of age. Analysis of covar iance and linear regression equations among these measurements were es timated. Heritability and repeatability of scrotal circumference and i ts genetic correlation with body weight were conducted. Arabi male lam bs showed longer testis and less scrotal circumference among other bre eds of sheep. Multiple and simple correlations among body weight and a ll testicular measurements were significantly high at different ages. Pooled heritability and repeatability of scrotal circumference were 0. 35 and 0.55 respectively. The genetic and environmental correlations o f scrotal circumference and body weight at different ages were medium and high respectively.