The Genetic Relationship between Commencement of Luteal Activity and Calving Interval, Body Condition Score, Production, and Linear Type Traits in Holstein-Friesian Dairy Cattle

The decline of fertility in the UK dairy herd and the unfavorable genetic correlation (ra) between fertility and milk yield has necessitated the broadening of breeding goals to include fertility. The coefficient of genetic variation present in fertility is of similar magnitude to that present in pro...

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Veröffentlicht in:	Journal of dairy science 2002-11, Vol.85 (11), p.3071-3080
Hauptverfasser:	Royal, M.D., Pryce, J.E., Woolliams, J.A., Flint, A.P.F.
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal productions Animals Biological and medical sciences body condition score Body Constitution - genetics Breeding calving interval Cattle - genetics Cattle - physiology Corpus Luteum - physiology Dairying - methods Estrus - genetics Female Fertility - genetics Fundamental and applied biological sciences. Psychology Genetic Variation Genetics of eukaryotes. Biological and molecular evolution Lactation - genetics linear type traits Male Milk milk progesterone Models, Genetic Population genetics, reproduction patterns Selection, Genetic Terrestrial animal productions United Kingdom Vertebrata Vertebrates
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Beschreibung
Zusammenfassung:	The decline of fertility in the UK dairy herd and the unfavorable genetic correlation (ra) between fertility and milk yield has necessitated the broadening of breeding goals to include fertility. The coefficient of genetic variation present in fertility is of similar magnitude to that present in production traits; however, traditional measurements of fertility (such as calving interval, days open, nonreturn rate) have low heritability (h2
ISSN:	0022-0302 1525-3198
DOI:	10.3168/jds.S0022-0302(02)74394-4