Source: Journal of Dairy Science
ABSTRACT
Genomic selection increases accuracy and decreases generation interval, accelerating genetic changes in populations. Assumptions of genetic improvement must be addressed to quantify the magnitude and direction of change. Genetic trends of US dairy cattle breeds...
Source: CDCB
The August 2024 CDCB evaluations have incorporated several changes outlined in August 2024 Evaluations: What’s New.
How were the genetic evaluations impacted by these changes?
The most significant changes have affected all yield traits (Milk, Fat and Protein) and Heifer...
Source: Cornell University
By: Juan Du
Inbreeding: breeding of genetically closely related individuals (any sort of relative to relative breeding is considered inbreeding).
Varying Degrees of Inbreeding
For the purpose of dairy cattle reproduction, the highest level of inbreeding is either breeding...
Source: University of Wisconsin
Heat stress not only affects the productive ability of your cattle but also their ability to conceive and sustain a pregnancy. It is important to understand the effect heat stress can have on reproduction and how...
Episode Description
Still reeling from the science outlined by Filippo Miglior, PhD, in episode 6 of the pod? Us too. That’s why we invited special guest, Christine Baes, PHD, to give us a download on the follow-up project. Christine is...
Source: Pennsylvania State University
The Voluntary Waiting Period (VWP) is the time between calving and when a farmer chooses to rebreed that cow. A VWP of 60 days is used to calculate daughter pregnancy rate and is a standard throughout...
Source: University of Guelph
Abstract
The sustainability and profitability of the dairy industry is at the forefront of current research. This is, in large part, due to increases in the costs of production and growing concern for the environmental impact of...
Source: CDCB
CDCB and USDA AGIL detail the changes implemented for the triannual genetic evaluations on August 13, 2024.
Introduction of 305-AA: The New standardized yield measurement
By Asha Miles, Paul VanRaden, Gary Fok, Jana Hutchison, Lillian Bacheller, Jay Megonigal and Ezequiel...
Source: Cornell University
By: Lorianna Keuhn and Tyler Olson
As the field of genetics has advanced, new undesirable haplotypes have been discovered. Among these are fertility haplotypes and congenital defects. As genotyping has become more prevalent on farms, the question of...
Source: ABS Global
What are polled cows?
The polled gene causes cows to be born without horns and is a dominant trait in cows. Additive traits (such as milk production) are those that are built up over time, where dominant and...
