Evaluation of bull fertility of Sahiwal breeding bulls
نویسندگان
چکیده
منابع مشابه
Optimizing age of bull at first use in relation to fertility of Murrah breeding bulls
AIM The aim of the present investigation was to optimize the age at first use (AAFU) of semen of Murrah breeding bulls, which will help in early selection of bulls under progeny testing program for improving the reproductive performance in the herd. MATERIALS AND METHODS The data on AAFU, conception rate based on first A.I. (CRFAI), overall conception rate (OCR), and birth weight (B.WT) of 57...
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T evaluation of bulls for breeding soundness is an effective and reliable way to identify bulls that are potentially poor breeders. This management technique can be used to greatest advantage if culling occurs before bulls are turned out with females. Also, the evaluation is an important means available to the producer for predicting bulls with satisfactory to excellent potential. This informat...
متن کاملSemen Ejaculates Characteristics, in vitro Fertility and Their Interrelationships in Sahiwal Bull Semen
This study aimed at determining the physico-morphological attributes, in vitrofertilityand their interrelationships in semen of Sahiwal bulls. Semen samples werecollected weekly for 6 weeks from ten mature Sahiwal bulls divided randomly into 5 groups. The mean (±SEM) of ejaculate volume (mL), mass activity (score 0-5), progressive sperm motility (%), sperm concentration (106/mL), live sperm (%)...
متن کاملSexual behavior and its relationship with semen quality parameters in Sahiwal breeding bulls
AIM The study was conducted at Artificial Breeding Research Centre, NDRI, Karnal, to determine the sexual behavior and its relationship with semen quality parameters in Sahiwal breeding bulls. MATERIALS AND METHODS A total of 63 ejaculates were collected from six adult Sahiwal bulls (age ~47 mo and bwt ~466 kg), to study the relationship of sexual behavior and semen quality. The degree of ass...
متن کاملBreeding 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 ...
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ژورنال
عنوان ژورنال: Indian Journal of Animal Research
سال: 2016
ISSN: 0976-0555,0367-6722
DOI: 10.18805/ijar.11156