315 Breeding for Efficiency: investigating dairy cattle efficiency traits and future implementation strategies.
نویسندگان
چکیده
منابع مشابه
ASAS/ADSA Breeding and Genetics: Breeding Strategies for Dairy Cattle
last rib backfat thickness, broken vertebrae, or scores for stomach ulcers (P > 0.21). Also, deletions of VTM premixes did not affect these same measurements (P > 0.22). However, RAC decreased (P < 0.01) backfat thickness by 8% and tended to decrease scores for stomach ulcers (P < 0.06). In conclusion, there were no interactions to suggest that the effects of RAC on growth performance and carca...
متن کاملBreeding efficiency of crossbred cattle and Murrah buffaloes at organized dairy farm
A total of 1474 and 1935 production and reproduction records of crossbred cattle and Murrah buffaloes from the year 1992 to 2012 were utilized in the present study to investigate breeding efficiency (BE) and various performance traits. Breeding efficiency was calculated using Wilcox and Tomar methods and Least –squares of Harvey model was used to study the effects of various non-genetic factors...
متن کاملDairy and Limits to Production 434 EXPERIENCES FROM BREEDING FOR ECONOMIC EFFICIENCY IN DAIRY CATTLE IN NEW ZEALAND
New Zealand dairy farmers use a number of performance indicators to describe their systems. Most of the performance indicators are scaled to a unit of feed or a proxy that relates a cow to a unit of feed, such as stocking rate or kilograms of live weight per tonne of feed. Genetic improvement of dairy cows can contribute to increasing the net income per unit of feed consumed. The current econom...
متن کاملConsequences for Dairy Cattle Breeding
Advances in breeding and management resulted in a considerable increase of production traits in Austrian dairy cattle. Besides, low input systems were also established. Possible genotype by environment interactions (G x E) and genetic antagonisms dependent on production level might indicate the need for separate breeding programmes for dairy farms diff ering in management intensity. Th us, G x ...
متن کاملBreeding and Genetics: Dairy Cattle Breeding I
Humans obtain a number of products from animals. These include food, clothing, medical materials, companionship and research knowledge to name a few. A valued ethic contends that it is inappropriate for one to treat another as a means to an end. In short, it is wrong to treat another as simply a product. Historically, non-human beings have not been included as “others” and thus their treatment ...
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ژورنال
عنوان ژورنال: Journal of Animal Science
سال: 2018
ISSN: 0021-8812,1525-3163
DOI: 10.1093/jas/sky404.263