Growth Traits as Indicators of Body Weights in Dorper Sheep

Abstract

The growth traits help rural farmers who lack weighing equipment to anticipate the body weights of their animals for a variety of reasons, including feeding, medication, and breeding purposes. The study aims to predict body weights from the growth traits of Doper sheep. Data on growth traits such as body length, heart girth, sternum height, withers height, rump height, and body weight were collected for one day from 50 Dorper sheep aged 1 to 2 years. Pearson's correlation and simple linear regression analysis were used to achieve the study's objectives. Pearson's correlation results in ewes indicated that body weights had a positive significant relationship with heart girth, wither height, and body length. Whereas in rams, body weights showed to be positively and statistically correlated to withers and sternum height. Simple linear regression demonstrated the highest coefficient with the lowest mean square error on heart girth in ewes and sternum and withers height in rams. Correlations suggest that increasing heart girth, withers height, and body length in ewes and withers and sternum height in rams might cause body weights to increase. The regression analysis in ewes revealed that heart girth contributes 27% of the variation in body weights, whereas sternum or withers height contributes 61% of the variation in rams. In conclusion, to improve body weights, ewes' heart girth, withers height, body length, and rams' withers and sternum heights and heart girth, may be selected.

Genetic variations of Toll-like receptor 4 gene in exon 2 of South African Dorper sheep

“…The Dorper sheep was attained by crossbreeding the Dorset Horn and Black-heated Persian and has the ability to produce fast-growing lambs and the ability to survive under harsh environmental conditions [ 1 ]. This breed plays a very significant role in the lives of rural community dwellers by providing by-products such as mutton, milk, and skin and income generation [ 2 ]. However, this breed is not resistant to gastrointestinal parasites [ 3 ], hence the study related to genetic resistance is important to identify the genetic resistant sheep that might be used for breeding.…”