Estimation Of Genetic Parameters For Various Preweaning And Postweaning Beef Cattle Traits
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Author | : M. M. de ALENCAR |
Publisher | : |
Total Pages | : 88 |
Release | : 1979 |
Genre | : |
ISBN | : |
Estimation of genetic parameters for various preweaning and postweaning beef cattle traits.
Author | : Mauricio Mello de Alencar |
Publisher | : |
Total Pages | : 198 |
Release | : 1977 |
Genre | : Beef cattle |
ISBN | : |
Estimation of genetic parameters for various preweaning and postweaning beef cattle traits.
Author | : Edward J. Otieno-Rege |
Publisher | : |
Total Pages | : 424 |
Release | : 1985 |
Genre | : |
ISBN | : |
Author | : Lee Evans |
Publisher | : |
Total Pages | : 110 |
Release | : 1956 |
Genre | : Beef cattle |
ISBN | : |
Author | : Brent Wayne Woodward |
Publisher | : |
Total Pages | : 296 |
Release | : 1990 |
Genre | : |
ISBN | : |
Author | : Richard John Dunn |
Publisher | : |
Total Pages | : 210 |
Release | : 1968 |
Genre | : Cattle |
ISBN | : |
Author | : Yang Mu |
Publisher | : |
Total Pages | : |
Release | : 2013 |
Genre | : |
ISBN | : |
The purpose of this thesis was to estimate genetic correlations between female fertility and feed efficiency measurements. Fertility data were collected from two Ontario beef herds and feed efficiency data were collected from one station with animals that originally came from five Ontario beef herds. Genetic parameters were estimated for female fertility traits (first-service conception rate, pregnancy rate, number of services per conception, gestation length and days-to-calving) and feed efficiency traits (feed conversion ratio, residual feed intake, average daily dry matter intake, average daily gain and metabolic mid-test body weight). Heritabilities for fertility traits were low to moderate and feed efficiency traits were moderate to highly heritable. Both traits need to be evaluated and considered in selection programs. Results indicate that animals with larger body weight are related to better fertility performance. An unfavourable correlation was found between residual feed intake and days-to-calving.
Author | : Haymchal Harricharan |
Publisher | : |
Total Pages | : 166 |
Release | : 1967 |
Genre | : Aberdeen-Angus cattle |
ISBN | : |
Author | : Marion Fitzgerald |
Publisher | : |
Total Pages | : 216 |
Release | : 1961 |
Genre | : Beef cattle |
ISBN | : |
Author | : Brian Wayne Kennedy |
Publisher | : |
Total Pages | : 500 |
Release | : 1974 |
Genre | : Beef cattle |
ISBN | : |