Artificial Insemination for Progeny-Test Breeding in Poultry
نویسندگان
چکیده
منابع مشابه
Artificial Insemination in Poultry
Artificial insemination is practiced extensively with commercial turkeys. This is primarily the result of selective breeding for a heavier and broader-breasted commercial turkey and the consequent inability of toms to consistently transfer semen to the hen at copulation. The broiler industry has not adapted AI to the extent of the turkey industry but it is occasionally used in pedigree lines an...
متن کاملBreeding the Problem Mare by Artificial Insemination
Horse breeding is the procedure by which an adequate number of sperm are deposited into the uterus of a “healthy” mare at the right time. Although semen deposition is performed in all breeds by natural cover (NC), it is often, and with increasing frequency, done artificially. Although the main difference between natural breeding and artificial insemination (AI) is the delivery method of semen i...
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 کاملTimeliness and effectiveness of progeny testing through artificial insemination.
Progeny-test (PT) programs of US artificial-insemination (AI) organizations were examined to determine timeliness of sampling, PT daughter distribution, rate of return of PT bulls to widespread service, and genetic merit of PT bulls compared with AI-proven and natural-service (NS) bulls. Bull age at semen release and at birth and calving of PT daughters was documented by breed (Ayrshire, Brown ...
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: Poultry Science
سال: 1949
ISSN: 0032-5791
DOI: 10.3382/ps.0280143