+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Evaluation of a technique for testing the performance of african bulls

, : Evaluation of a technique for testing the performance of african bulls. South African Journal of Animal Science 7(2): 147-148

A group of 109 African breed bulls of the Agricultural Research Institute in Glen (South Africa) were used to study growth with natural grazing and phenotypic correlations. Intensive feeding (with alfalfa additives) and a determination of weight gain were also conducted. Phenotypic correlations were calculated for various criteria by covariance analysis. The correlation coefficients were tabulated, and the weight at weaning was highly significant when related to final weight in the field, in the feeding shed and the time factor. The information obtained reveals the results on each animal of various feeding levels and permits a biological evaluation of each bull.

Accession: 005395789

Submit PDF Full Text: Here

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Related references

Todorov, D.; Angelov, M., 1973: Comparative evaluation of bulls by progeny testing. I. Breeding value of AI bulls according to method of assessment and milking technique. 4 AI bulls on the Yambol AI station were evaluated by contemporary comparison under conditions of (i) a progeny testing station and (ii) 2 herds belonging to the Yambol co-operative farm. Feeding in (i) and (ii) was on a medium level, more succule...

Todorov, D.; Angelov, M., 1973: Comparative evaluation of bulls on dairy performance of progeny. 1. Breeding value of bulls, different testing conditions and different milking methods. Two Brown Mountain and 2 Bulgarian Brown bulls were progeny-tested using contemporary comparisons. Peak lactation records were considered. For the 4 bulls resp., the RBV for milk yield was 95.8, 107.3, 95.8 and 102.0%, and the RBV for milk fat per...

Theron, H.E.; Scholtz, M.M.; Schoeman, S.J., 1992: A comparison of the performance of Holstein and Friesian bulls in the South African Progeny Testing Scheme. The performance of 92 Holstein-Friesian bulls, which were accepted for progeny testing ander the South African National Dairy Animal Performance and Progeny Testing Scheme during 1982, 1983 and 1984, was compared. Bulls which were locally bred for...

Estrada Arteaga, A., 1984: Factors affecting the performance and evaluation of bulls at performance testing stations. Data on 50 Brangus bulls, fattened for 140 days, were analysed. Daily gains during the test period and weight per day of age at the end of the period accounted for 59% of the variation in the final test index. This index was significantly correlat...

Duynisveld, J.L.; Charmley, E., 2001: An evaluation of models predicting beef cattle performance using data from bulls on performance testing. Data from 372 bulls on performance testing were used to compare predictions of intake and gain with observed performance when the forage-to-concentrate ratio (F : C) in the ration ranged from 57 : 43 to 45 : 55. Predictions were derived from the N...

Preston, R.L.L.avitt, R.K.T.ompson, G.B., 1963: Evaluation of rations used in performance testing of bulls and steers

Brade, E.; Wollert, J., 1988: Current progeny testing for fattening performance and carcass yield of beef bulls under different feeding regimes and conclusions for performance testing and selection. In 1985-86, 60 and 109 beef bulls (mainly German Simmental, GS, and Charolais X GS) were progeny-tested at 2 testing stations in the German Democratic Republic on the basis of the performance of a total of 1151 and 1394 progeny. At the Neuenhagen...

Madsen, P., 1992: 25 years at the Egtved beef performance testing station (1967- 1992). 7. Performance testing of bulls of dairy and dual- purpose breeds in 1990-91. In 1990-91, in Denmark, 908 bulls entered performance testing and 856 bulls competed the test. For Danish Red (DR), Danish Black Pied (DBP), Jersey and Danish Red Pied (DRP) bulls tested at Egtved, daily gain averaged 1293, 1291, 981 and 1286 g re...

Nahlik, K.S.olzman, M., 1970: Evaluation of fattening value of bulls of dairy-beef breeds based on performance testing; a review. Postepy nauk rolniczych: 17 (4) 3-26

Yoshida, S.; Ueda, K.; Tanaka, S.; Matsukawa, T., 1965: Studies on the methods of performance testing for meat productivity in the Japanese Black breed of cattle. 3. On the problem of test period and some factors affecting performance testing of bulls. 12 bulls aged 8 mths. were reared on ad lib. feeding for 308 days; daily gain averaged 0.96 kg. Initial body weight was correlated with gain over the test period. There was little variation in meat quality among half-sibs. It is suggested that a t...