Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bullcalves at different ages
2001
Yohanes Gojam(Ethiopian Agricultural Research Organization, Addis Abeba (Ethiopia)) | Azage Tegegne(International Livestock Research Institute, Debre Zeit (Ethiopia)) | Alemu Gebrewold(Ethiopian Agricultural Research Organization, Addis Abeba (Ethiopia)) | Mengistu Alemayehu(Ethiopian Agricultural Research Organization, Addis Abeba (Ethiopia)) | Zelalem Yilma(Ethiopian Agricultural Research Organization, Addis Abeba (Ethiopia))
Measurements on testis and linear body size, scrotal circumference (SC), testis diameter (TD), hearth girth (HG), height at wither (HTW) and body length (BDL) at the age of 1, 3, 6, 9, 12. 15, 18 and 21 months was taken. Thirteen Borana Friesian (BoXF) crossbred bull calves born at Holetta Agricultural Research Centre (HARC) during the year 1998/99 calving season were used. The objective of the work was to determine the testis and body size of the bullcalves and their relationship at different ages to consider as criterion for early selection of breeding bulls. Statistical analysis indicated that significantly different (p0.001) rate of increased in testis and body size of measured variables between age groups. However the magnitude of increase in size of TD, SC, HG, HTW, and BDL was not significant (p0.05) in the age group between 18 and 21 months. Body weight (Wt) have influenced the increase of SC (p0.001) and TD, HTW and BDL (p0.05). HG, BDL and HTW were positive and significantly (p0.001) correlated to TD and SC respectively, r
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