Genetic correlation estimations between artificial insemination sire performances and their progeny beef traits both measured in test stations
نویسندگان
چکیده
منابع مشابه
Estimates of genetic trend in an artificial insemination progeny test program and their association with herd characteristics.
Individual lactation records from Holstein cows in 3449 herds participating in an AI stud's young sire sampling program from 1971 to 1987 were used to characterize the sampling program and to estimate genetic merit and trend. Average genetic merit of cows in sampling program herds was consistently superior to the average genetic merit of cows in the US population. Genetic trend of sires of firs...
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15 صفحه اولFixed-time artificial insemination in beef cattle
BACKGROUND The study was designed to test the effect of fixed-time artificial insemination (fixed-AI) after the slightly modified Ovsynch protocol on the pregnancy rate in beef cattle in Finnish field conditions. The modification was aimed to optimize the number of offsprings per AI dose. METHODS Ninety Charolais cows and heifers were entered into the program an average of 1.8 times. Thus, 16...
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1Associate professor, f , Department rt t off Agricultural i lt l Economics i and Business, i , University i it off ‘ i t Guelph, Guelph,, Ontario; while the final version was being completed, t , Visiting academic, i , Z Dt:partment off Agriculture i lt and Resource Econonlics, University i it off New England. l . 2 2 Graduate t research assistant, i t t, Department rt nt off Agricultural i lt...
متن کاملUsability for genetic evaluations of records from herds participating in progeny test programs of artificial insemination organizations.
Thirteen AI organizations provided identification of herds that participated in their progeny test programs in 1989 and 1990; 15% of those herds participated in programs of more than one AI organization, but only 2.6% participated in programs of more than two AI organizations. Of the 19,589 participating herds, 82 and 76% were enrolled in DHI test plans that were considered to be usable for gen...
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ژورنال
عنوان ژورنال: Genetics Selection Evolution
سال: 2000
ISSN: 1297-9686
DOI: 10.1186/1297-9686-32-5-483