Examination of Droughtmaster bulls for breeding soundness

Citation

Bongso, T.A. and Jainudeen, M.R. and Dass, S. (1981) Examination of Droughtmaster bulls for breeding soundness. Theriogenology, 15 (4). pp. 415-425. ISSN 0093-691X; eISSN: 0093-691X

Abstract

Forty Droughtmaster bulls were evaluated for breeding soundness, using the method of examination and criteria for classifying bulls of the Society for Theriogenelogy. Eighty three percent of the bulls were classified as satisfactory, 14 percent as questionable and 3 percent as unsatisfactory breeders. Scrotal circumference for 2 to 8-year-old bulls were smaller in questionable and unsatisfactory bulls, as compared to satisfactory bulls. For bulls rated as satisfactory breeders, the scrotal circumference of 37 to 43 cms was higher than for other beef breeds. Three related bulls (2 questionable, 1 satisfactory) carried sperm defects classified as 'knobbed' (38 ± 3%), 'Dag' (40 ± 4%) and 'pseudo-droplets' (41 ± 5%), which may adversely affect fertility.

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Additional Metadata

Item Type:	Article
Divisions:	Universiti Pertanian Malaysia
DOI Number:	https://doi.org/10.1016/0093-691X(81)90008-X
Publisher:	Elsevier
Keywords:	Droughtmaster cattle; Breeding soundness; Bull fertility; Scrotal circumference; Sperm defects; Knobbed sperm; Dag sperm; Pseudo-droplet sperm; Infertility
Depositing User:	Mohamad Jefri Mohamed Fauzi
Date Deposited:	14 Feb 2025 02:14
Last Modified:	14 Feb 2025 02:14
Altmetrics:	http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/0093-691X(81)90008-X
URI:	http://psasir.upm.edu.my/id/eprint/114994
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