Results 41 to 50 of about 1,561,107 (243)

Genetic Improvement in Cattle Through Artificial Insemination and Artificial Insemination at Fixed Time

open access: yesAgricultural Research & Technology: Open Access Journal, 2019
The livestock sector seeks to improve the productivity of meat, milk and rusticity, through crosses, which has led to deterioration of racial lines, impact on the decline in quality and quantity of production, and directly influencing profitability. Currently the biotechnological advances propose to improve the production levels of a cattle company ...
openaire   +1 more source

Genomic Structural Variations Provide Insights Into Litter Size and Teat Number Traits in Hu Sheep

open access: yesAnimal Research and One Health, EarlyView.
Here, we conducted whole genome sequencing on 300 Hu sheep with an average depth of 16.51X. Two candidate genes associated with litter size and teat number traits were identified, namely MAST2 and AFDN. ABSTRACT Litter size and the teat number are important economic indicators in sheep production.
Xin Xiang   +3 more
wiley   +1 more source

Estrous Synchronization and Fixed-Time Artificial Insemination

open access: yesEDIS, 2016
The economic success of beef cow-calf operations depends on the production of one healthy calf per cow per year. To achieve this goal, cow-calf producers need to overcome several obstacles related to the cow, bull, and offspring. Over the last four decades, several advances in reproductive biotechnologies, such as artificial insemination (AI ...
Vitor R. G. Mercadante   +5 more
openaire   +5 more sources

Association between chronic Anaplasma marginale and Babesia spp. infection and hematological parameters of taurine heifers

open access: yesRevista Brasileira de Parasitologia Veterinária, 2023
The aim of this study was to investigate the association between chronic Anaplasma marginale and Babesia spp. infection and hematological parameters of pregnant and non-pregnant taurine heifers.
Natalia Machado Rahal   +8 more
doaj   +1 more source

Robustness in Timed Automata [PDF]

open access: yes, 2013
In this paper we survey several approaches to the robustness of timed automata, that is, the ability of a system to resist to slight perturbations or errors.
Markey, Nicolas   +7 more
core   +1 more source

Cumulative Reproductive‐Lactation Burdens Induce a Systemic Immunometabolic Trade‐Off Between Milk Yield and Mammary Health of Dairy Cows

open access: yesAnimal Research and One Health, EarlyView.
A population‐scale longitudinal transcriptomic atlas reveals how lactation stage and parity reshape systemic gene regulation in dairy cows. Multiomics‐inspired analyses uncover dynamic immune and metabolic adaptations that contribute to reproductive longevity and sustained productivity across the bovine lifespan.
Yangyang Shen   +8 more
wiley   +1 more source

Synchronisation of ovulation for management of reproduction in dairy cows

open access: yesAnimal, 2014
Important developments have occurred in the last two decades, since the advent of the Ovsynch protocol, on the understanding and use of synchronisation programmes for management of reproduction in dairy herds.
R.S. Bisinotto   +2 more
doaj   +1 more source

Fertility response in postpartum anoestrus buffaloes (Bubalus bubalis) using modified Ovsynch based timed insemination protocols [PDF]

open access: yesVeterinary World, 2015
Background and Aim: Suboestrus constitutes the largest factor responsible for poor reproductive efficiency in buffaloes. Therefore, oestrus synchronization (OS) and fixed-time artificial insemination (AI) is considered an alternative approach to enhance ...
K. K. Gupta   +3 more
doaj   +1 more source

ATTEMPTS TO DETERMINE THE OPTIMAL TIME OF ARTIFICIAL INSEMINATION IN HEIFERS [PDF]

open access: yesReproduction, 1974
Agricultural Institute, Grange, Dunsany, Co. Meath, Ireland (Received 2nd May 1974) To be ultimately successful, techniques used to control the oestrous cycle of the cow will have to embody methods which allow the time of insemination to be arranged without reference to behavioural oestrus.
openaire   +2 more sources

Veterinarian and breeder perspectives surrounding ovum pick‐up and intracytoplasmic sperm injection in mares: A survey study

open access: yesEquine Veterinary Journal, EarlyView.
Abstract Background There is an ethical debate about the application of ovum pick‐up (OPU) and intracytoplasmic sperm injection (ICSI) in mares. Objectives To survey the opinions of equine veterinarians and breeders of sport horses on the ethics of using OPU–ICSI in mares. Study Design Cross‐sectional descriptive study.
Niamh Lewis   +7 more
wiley   +1 more source

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