Estimates of Repeatability of Reproductive Measures in Canadian Holsteins
نویسندگان
چکیده
منابع مشابه
Estimates of Repeatability and Heritability of Productive Trait in Holstein Dairy Cattle
Dairy cattle breeding programs have been based in the selection for traits related to milk production. In this research a data set of 63 herds of East Azerbaijan province Holstein cattle, collected during 2002-2013 by the Iranian Animal Breeding Center was used to estimate the repeatability and heritability of three traits of economic importance. Genetic parameters for first three lactations of...
متن کاملI-20: Quality of Life Measures in Reproductive Health
Background Quality of life or more correctly health-related quality of life is currently receiving more attention in biomedical literature and outcome studies. However, there are several issues that we should be dealt with. First, measuring quality of life needs valid and reliable instruments. In addition, it is important to know how we conceptualize quality of life and reproductive health. Fin...
متن کاملGenetic analysis of return over feed in Canadian Holsteins.
The objective of this study was to investigate genetic merit of return over feed (ROF), which is a herd profit index defined by CanWest Dairy Herd Improvement as a difference between milk income and feed cost. A multiple-trait (MT) model and random regression model (RRM) were used. The traits analyzed in MT were rearing cost and ROF of the first three lactations. In RRM, a cumulative ROF was fi...
متن کاملfaculty of psychology and social sciences group of anthropology master thesis in major of anthropology
چکیده پایان نامه (شامل خلاصه، اهداف، روش های اجرا و نتایج به دست آمده): کار جمع آوری گو یش های محلی در سال های اخیر شتاب امیدوار کننده ای به خود گرفته است. شاید از بارزترین اهداف جمع آوری گویش های مختلف، ثبت و ضبط آن، جلوگیری از نابودی و مهمتر از همه حل مشکلات دستوری زبان رسمی باشد. دقت در فرآیند های زبانی گویش های محلی نوع ارتباط مردم نواحی مختلف با پیرامون نشان را به ما نشان خواهد داد. از س...
Breeding for health using producer recorded data in Canadian Holsteins
Health traits are of increasing importance to dairy producers. In the Scandinavian countries, direct selection for improved disease resistance has been carried out for more than 30 years (Philipsson and Lindhé, 2003). In these countries, veterinary treatments are recorded, as all treatments involving antibiotics and hormones have to be made primarily by a veterinarian. As veterinarians have ext...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1992
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(92)77927-2