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  • 1 Institute of Animal Husbandry
  • 2 Department of Nutrition, Gödöll' of Agricultural Sciences, H2103 Gödöll' Páter K. u. 1, Hungary
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This study was conducted to compare three different methods for calculating scrotal circumference (ASC1, ASC2, ASC3) adjusted to 365 days of age in Charolais, Limousin and Hungarian Fleckvieh young bulls at the end of the self-performance test. Young breeding bulls from three Charolais, Limousin and Hungarian Fleckvieh breeding farms (farm A: n = 40; farm B: n = 9; farm C: n = 11) were used. The young bulls were kept in loose housing system, in small groups, and fed a diet based on maize silage and concentrate. The scrotal circumference of young bulls was measured at the widest part of the scrotum at the beginning and at the end of the test. Significant growth was observed (+13.6 cm; +8.9 cm; +10.5 cm, P < 0.001) in scrotal circumference (SC) for all breeds except the Hungarian Fleckvieh (ASC2-ASC3: 37.5 vs. 37.6 cm). All differences among the means of the measured and adjusted SCs were statistically confirmed at the P < 0.05 level of significance. A moderate to close positive correlation (r = 0.49-0.99) was calculated among the measured SC and the three types of ASC. The results suggest that method I (ASC1) and method II (ASC2) should be used by the breeders for adjusting scrotal circumferences in the practice.

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