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Effect of age at first calving on longevity and fertility traits for Holstein cattle
functional traits survival analysis linear model cattle
2015/6/24
Effects of age at first calving (AFC) on functional longevity of Czech Holstein cows and their reproduction traits in the first lactation were analyzed using the first lactation data of 605 538 Holste...
A Genome Wide Association Study on Age at First Calving Using High Density Single Nucleotide Polymorphism Chips in Hanwoo (Bos taurus coreanae)
Single Nucleotide Polymorphism Whole Genome
2016/5/17
Age at first calving is an important trait for achieving earlier reproductive performance. To detect quantitative trait loci (QTL) for reproductive traits, a genome wide association study was conducte...
The Effect of Age at First Calving and Calving Interval on Productive Life and Lifetime Profit in Korean Holsteins
Age at First Calving Calving Interval Lifetime Profit Productive Life
2016/5/12
This study was performed to estimate the effect of age at first calving and first two calving intervals on productive life and life time profit in Korean Holsteins. Reproduction data of Korean Holstei...
STUDY ON THE AGE AT FIRST CALVING AND THE LONGEVITY OF BEEF COWS
age at culling live span breeds
2010/12/3
The age at fi rst calving, the life span and the longevity of cows have great importance in cattle husbandry, especially in beef cow husbandry, because the cost of raising weaned calves depends largel...
RELATIONSHIPS BETWEEN BODY MEASUREMENT OF DAIRY CALVES AT SIX MONTH OF AGES AND AGE AT FIRST CALVING AND MILK PRODUCTION
cattle milk production body measurement
2010/11/30
In this research, the relationships of between body measurements such as heart girth, body length, height at withers and chest depth at six month of ages of calves and their age at first calving and t...