Inter-relationships Between Age at First Calving and Production During First Lactation of Imported Friesian Cattle and their Locally Born Daughters

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

Genetic and phenotypic parameters for production and stayability in British Friesian-Holstein cattle

Genetic and Phenotypic Associations of Milk Traits with Age at Calving and with Length of Open Period, Dry Period and Lactation

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

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

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

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

PHENOTYPIC RELATIONSHIPS AMONG SOMATIC CELL COUNT, MILK UREA CONTENT, TEST-DAY MILK YIELD AND PROTEIN PERCENT IN DAIRY CATTLE

Analysis of the milk production of daughter groups of proven sires remaining in the herds for three consecutive lactations