EFFECT OF CALVING SEASON, PARITY AND AGE AT FIRST CALVING ON PERFORMANCE TRAITS AND PHENOTYPIC CORRELATIONS BETWEEN THESE TRAITS IN HOLSTEIN FRIESIAN COWS

GENETIC AND PHYNOTYPIC CORRELATIONS OF AGE AT FIRST CALVING WITH SOME CALF-HOOD FITNESS AND HEALTH TRAITS IN HOLSTEIN HEIFERS

Heifer Fertility Relationship with First Lactation Cow Traits of Friesian Dairy Cattle in Egypt

Relationships between Milk Yield in the First Lactation, Ag-e at First Calving and Stayability in Dairy Cattle

GENETIC AND PHENOTYPIC RELATIONSHIPS AMONG FIRST LACTATION TRAITS AND SOME LONGEVITY AND LIFETIME TRAITS IN FRIESIAN CATTLE.

Some Factors Affecting Length of Calving Interval in a Herd of Friesian Cattle in the U.A.R.

A Genetic Study on the Lactation Curve in Friesian Cattle

GENETIC AND PHENOTYPIC TRENDS OF CALVING INTERVAL AND AGE AT FIRST CALVING IN A COMMERCIAL HOLSTEIN HERD

GENETIC AND PHENOTYPIC TREND OF MILK PRODUCTION TRAITS AND AGE AT FIRST CALVING APPLYING RANDOM REGRESSION MODEL IN FRIESIAN CATTLE IN EGYPT

Relationships of Early Performance Traits with Longevity and Lifetime Traits in Friesian Cattle under Egyptian Conditions