Quantifying Dairy Breeding Goals. 2. Perceived Relative Contributions of Type Traits to Total Merit
نویسندگان
چکیده
منابع مشابه
New phenotypes for new breeding goals in dairy cattle.
Cattle production faces new challenges regarding sustainability with its three pillars - economic, societal and environmental. The following three main factors will drive dairy cattle selection in the future: (1) During a long period, intensive selection for enhanced productivity has deteriorated most functional traits, some reaching a critical point and needing to be restored. This is especial...
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Use of impact factor (IF) to quantify scientific merit is severely flawed. Three changes are recommended to strengthen the assessment of journals that primarily report basic research: (1) calculate IF based on original scientific contributions; (2) use the 5-year IF; and (3) eliminate selfcitation. For journals reporting clinical trials and population research, an index of readership, such as d...
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Benefits from the use of optimised selection for maximising genetic gain while constraining the rate of inbreeding were evaluated through stochastic simulation for scenarios where the breeding goal includes two negatively correlated traits. One of the traits was controlled only by polygenes and had a heritability of 0.3 while the other trait was controlled by an identified additive biallelic QT...
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The major sources of variability in net farm income on New York dairy farms over the past 10 years are identified using Dairy Farm Business Summary records. The most important source of income variability is the fluctuation in milk prices, followed closely by year-to-year variation in the quantity of purchased feeds. These results suggest that forward pricing of milk and feed purchases may be e...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1986
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(86)80427-1