Usability for Genetic Evaluations of Records from Herds Participating in Progeny Test Programs of Artificial Insemination Organizations
نویسندگان
چکیده
منابع مشابه
Usability 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...
متن کاملOverview of progeny-test programs of artificial-insemination organizations in the United States.
Characteristics of progeny-test (PT) programs of artificial insemination (AI) organizations in the United States were examined for changes since 1960. Mean number of bulls that were progeny tested annually by major AI organizations during the mid 1990s was 11 for Ayrshires, 24 for Brown Swiss, 21 for Guernseys, 1261 for Holsteins, 112 for Jerseys, and 3 for Milking Shorthorns. Mean parent age a...
متن کاملStability of genetic evaluations for active artificial insemination bulls.
Genetic evaluations for milk, fat, and protein from 1995 through August 2003 for 17,987 Holstein bulls in active artificial insemination (AI) service were examined for changes to the November 2003 evaluation. Evaluations for active AI bulls at each of 31 evaluation dates showed mean declines to November 2003. No evidence was seen of a worsening situation over time. Bulls' early evaluations with...
متن کاملGenetic trend for milk yield in Guzerat herds participating in progeny testing and MOET nucleus schemes.
Genetic trends for 305-day milk yield (P305) in Brazilian Guzerat herds under selection were compared. Data from 4898 lactations of 3179 purebred and crossbred cows from various regions of Brazil were used. Milk yield was adjusted for mature age and the contemporary groups were defined as herd and calving year. Genetic parameters were estimated using the MTDFREML program. The model included the...
متن کاملGuardianship of Children Born from Artificial Insemination
Infertility in the world today is no longer an inescapable problem, and doctors have been able to solve the problem of infertile treatment in a coherent way. The birth of children by artificial insemination is in the following ways: 1) Insemination by husband’s sperm with egg inside the uterus or out of it for fertilization, and 2) Inoculation by another sperm (stranger-donor) inside or outside...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1997
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(97)76216-7