The Reproductive Traits of Sheep and Their Influencing Factors

In farm animals, both genetic and non-genetic factors affect reproductive traits. These can be categorized as intrinsic extrinsic. Extrinsic relate to the animal’s environment, while are related its genotype. Various traits studied concerning age, season, management, nutrition, body score, birth type. addition, variations of transforming growth factor-β (TGFβ) superfamily including BMPR-1B, BMP15, GDF9 have been for their effect on sheep reproduction. Numerous other genes that characteristics in also identified, melatonin receptor 1A, SLC5A1, CCNA1, ABCC1, insulin-like factor-I (IGF-1), leptin receptor, prolactin, GREM1, numerous new candidates. vary based differences environmental conditions composition livestock. Genetic influence livestock improved by understanding those factors, but phenotypic associations scarce. Accurate evaluation development breeding goals require a more accurate parameters, particular correlations with As result, how interact becomes critical developing efficient effective management plans sheep. This review provides insight into performance.