Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages
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 Agricultur...
| Main Authors: | , , , , |
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| Format: | Conference Paper |
| Language: | Inglés |
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Ethiopian Society of Animal Production
2002
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/51126 |
| _version_ | 1855540498338414592 |
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| author | Gojam, Y. Tegegne, Azage Gebre-Wold, A. Alemayehu, M. Yilma, Z. |
| author_browse | Alemayehu, M. Gebre-Wold, A. Gojam, Y. Tegegne, Azage Yilma, Z. |
| author_facet | Gojam, Y. Tegegne, Azage Gebre-Wold, A. Alemayehu, M. Yilma, Z. |
| author_sort | Gojam, Y. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | 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 (P<0.001) rate of increase 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 (P<0.05) in the age group between 18 & 21 months. Body weight (Wt) have influenced in increase of SC (P<0.001) and TD, HTW and BDL (P<0.05). HG, BDL and HTW were positive and significantly (P<0.001) correlated to TD and SC respectively, r=0.94, 0.92 and 0.68 respectively. It appears evident from the results of this study, that sexual maturity could be attained in Box F from closer to 15 months of age, since the increasing rate of testis size was lower and steady after this age. Even if the determination of sexual maturity in male needs detail examination and is complex, at field level the steady change in testis and body size may indicate the inclination of the animal to physiological maturity. The result also suggests that testis size could be described in terms of body size. Further study in this line may deal with determination of quality and quantity of semen at different ages of bull calves for indigenous and different genotypes, since the information available is quiet insufcient. |
| format | Conference Paper |
| id | CGSpace51126 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2002 |
| publishDateRange | 2002 |
| publishDateSort | 2002 |
| publisher | Ethiopian Society of Animal Production |
| publisherStr | Ethiopian Society of Animal Production |
| record_format | dspace |
| spelling | CGSpace511262016-05-30T17:53:22Z Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages Gojam, Y. Tegegne, Azage Gebre-Wold, A. Alemayehu, M. Yilma, Z. body measurements testes friesian cattle crossbreds bulls calves age livestock management body weight birth weight 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 (P<0.001) rate of increase 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 (P<0.05) in the age group between 18 & 21 months. Body weight (Wt) have influenced in increase of SC (P<0.001) and TD, HTW and BDL (P<0.05). HG, BDL and HTW were positive and significantly (P<0.001) correlated to TD and SC respectively, r=0.94, 0.92 and 0.68 respectively. It appears evident from the results of this study, that sexual maturity could be attained in Box F from closer to 15 months of age, since the increasing rate of testis size was lower and steady after this age. Even if the determination of sexual maturity in male needs detail examination and is complex, at field level the steady change in testis and body size may indicate the inclination of the animal to physiological maturity. The result also suggests that testis size could be described in terms of body size. Further study in this line may deal with determination of quality and quantity of semen at different ages of bull calves for indigenous and different genotypes, since the information available is quiet insufcient. 2002 2014-10-31T06:22:07Z 2014-10-31T06:22:07Z Conference Paper https://hdl.handle.net/10568/51126 en Limited Access Ethiopian Society of Animal Production |
| spellingShingle | body measurements testes friesian cattle crossbreds bulls calves age livestock management body weight birth weight Gojam, Y. Tegegne, Azage Gebre-Wold, A. Alemayehu, M. Yilma, Z. Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages |
| title | Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages |
| title_full | Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages |
| title_fullStr | Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages |
| title_full_unstemmed | Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages |
| title_short | Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages |
| title_sort | testicular growth and its relationship with linear body measurements in borana friesian crossbred bull calves at different ages |
| topic | body measurements testes friesian cattle crossbreds bulls calves age livestock management body weight birth weight |
| url | https://hdl.handle.net/10568/51126 |
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