Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

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Indian Journal of Animal Research, volume 55 issue 7 (july 2021) : 796-800

Testicular Biometry for Breeding Soundness Evaluation of Sahiwal Males Reared under Tropical Conditions

Muzamil Abdullah, T.K. Mohanty, M. Bhakat, A. Kumaresan, A. Singh, S. Mondal, S. Kerketta
1ICAR-National Dairy Research Institute, Karnal-132 001, Haryana, India.
Cite article:- Abdullah Muzamil, Mohanty T.K., Bhakat M., Kumaresan A., Singh A., Mondal S., Kerketta S. (2020). Testicular Biometry for Breeding Soundness Evaluation of Sahiwal Males Reared under Tropical Conditions. Indian Journal of Animal Research. 55(7): 796-800. doi: 10.18805/IJAR.B-4117.
Background: The testicular biometry such as scrotal circumference (SC) and scrotal volume, affect semen quality hence bull fertility and thus testicular biometry can be used for breeding soundness of bulls. 
Methods: The present study was carried out to study the testicular parameters of 77 Sahiwal males of different ages and to establish its importance for selection of breeding bulls during 2015-2016 at ICAR-NDRI, Karnal. The testicular biometry of each male was done at monthly intervals using Vernier calliper, cloth tap and ultrasonography. 
Result: The semen quality parameters were significantly (P<0.05) more in the group having higher scrotal circumference. The scrotal circumference follows the curvilinear manner of growth from 12 months to >72 months (correlation value of 0.92 and R2 0.84). The paired testicular volume (PTV) differed significantly (P<0.05) between different age group males. Scrotal circumference and paired testicular volume are directly related to semen quality hence bull fertility. Thus, testicular biometry is an important criterion for breeding soundness for selecting Sahiwal males. 
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