alexa Growth and fertility of bulls cloned from the somatic cells of an aged and infertile bull.
Genetics & Molecular Biology

Genetics & Molecular Biology

Cloning & Transgenesis

Author(s): Shiga K, Umeki H, Shimura H, Fujita T, Watanabe S,

Abstract Share this page

Abstract In the present study, somatic cell cloning technology was used to produce eight newborn calves from an aged, infertile bull. Average birth weight of these calves was significantly higher than that of calves produced using AI. Four of the cloned calves died during the peripartum period; the remaining four (Clones A-D) survived and were used in this study. Two of the surviving calves (Clones C and D) were castrated; growth rates of the intact and castrated clones were similar to those of intact and castrated bulls, respectively, that had been derived by AI. Both uncastrated bulls (Clones A and B) began to produce normal semen at approximately 12 months of age. Semen produced by these clones, and their nuclear donor, was subsequently used for IVF; the proportion of IVM-IVF oocytes developing to the blastocyst stage was 23.4\% (50/214), 28.4\% (52/183) and 30.9\% (63/204), respectively. Conception rates for AI were 54.5\% (12/22) and 62.7\% (64/102) for semen derived from Clone A and from the nuclear donor, respectively. The length of pregnancy and birth weight of the calves derived from semen collected from clones were similar to those of calves obtained by conventional AI using semen from their nuclear donor. Therefore, sires cloned from the somatic cells of an aged and infertile bull had normal fertility. This article was published in Theriogenology and referenced in Cloning & Transgenesis

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

1-702-714-7001Extn: 9037

Business & Management Journals


1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

1-702-714-7001 Extn: 9042

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version