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Showing 1 to 4 of 4 for “"first calving interval"”.
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Relationships between first lactation milk yield, first calving interval, herd life, lifetime milk production, and descriptive type subtraits in Holstein cattle
… which of the type subtraits were related to first lactation production, first calving interval, herd life, and lifetime milk and fat yields. Variables other than type traits were expressed as deviations from the contemporary average. Heritabilities of type subtraits ranged from .00 to .45. …
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Comparisons of Holstein, Brown Swiss, and Jersey cows for age at first calving, first calving interval, and true herd-life up to five years in seven regions of the United States
… for heat-stress resistance using age at first calving and first calving interval, and to assess breed by region interactions for seven regions of the United States for survival-related traits up to five years of age in Brown Swiss, Holstein, and Jersey cows. Age at first calving and first …
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Efeito do cromossomo x no mapeamento de regiões genômicas sobre características de interesse econômico em búfalos da raça murrah
… related to reproductive traits (age at first calving – AFC, first calving interval – CFI1, and second calving interval – CFI2) in Murrah buffaloes. CFI1 represents the period from an animal's calving to the subsequent one during its first lactation, while CFI2 refers to the interval …
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Heritability estimates for calving date in Simmental cattle
… at least 50% Simmental breeding, to have calved first at 2 yr of age and to have been born and subsequently calved in the same herd and season. Traits analyzed included first and second calving dates, first calving interval and the percentage of cows that returned to calve in the same season as …