Relationship of testicular biometry with semen variables in breeding soundness evaluation of Nellore bulls
نویسندگان
چکیده
منابع مشابه
Breeding Soundness of Bulls
The importance of the bull in a cattle breeding program often is underestimated. A cow is responsible for half the genetic material in only one calf each year, while the bull is responsible for half the genetic material in 20 to 50 calves. The bull’s ability to locate cows in estrus and breed them is clearly vital to a successful breeding program. Bulls differ in physical appearance, fertility ...
متن کاملBreeding soundness evaluation of bulls by semen analysis, testicular fine needle aspiration cytology and trans-scrotal ultrasonography
The aim of this study was to evaluate the usefulness of trans-scrotal ultrasonography and testicular fine needle aspiration cytology in assessing bulls for breeding suitability. These two techniques were also compared with semen analysis. Bulls presented for breeding soundness evaluation were assessed using all three techniques. The findings of each technique were compared. There was agreement ...
متن کاملGearing up superior quality semen production: breeding soundness evaluation of bulls and beyond
India is the foremost milk producing nation of the world, and homes the largest domesticated bovine population. But the average productivity of indigenous/non-descript animals is far below than that of Taurine cattle. Crossbreeding of low producing indigenous and nondescript cattle with high producing exotic breeds like Holstein Friesian and Jersey is followed as the breeding policy of the coun...
متن کاملGenetic parameters for scrotal circumference, breeding soundness examination and sperm defects in young Nellore bulls.
A total of 51,161 records of scrotal circumference measurements at 18 mo of age (SC18) and 17,648 records of sperm defects and breeding soundness of Nellore bulls (mean age of 22.5 mo), raised under extensive conditions, were analyzed to estimate coefficients of heritability and genetic correlations of morphological semen traits by Bayesian inference. The observed semen traits were classified a...
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ژورنال
عنوان ژورنال: Animal Reproduction Science
سال: 2018
ISSN: 0378-4320
DOI: 10.1016/j.anireprosci.2018.07.010