Semen characteristics of genetically identical quadruplet bulls

Modern cloning methods have become an important technology in artificial insemination which is used to create and maintain pools of genetically superior bull semen. In this study, semen from four identical quadruplet bulls (Q1, Q2, Q3, and Q4) produced by blastomere separation was analyzed to evalua...

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Bibliographic Details
Published in:Theriogenology 2003-04, Vol.59 (8), p.1865-1877
Main Authors: Lessard, Carl, Masseau, Isabelle, Bilodeau, Jean-François, Kroetsch, Tom, Twagiramungu, Hermenegilde, Bailey, Janice L, Leclerc, Pierre, Sullivan, Robert
Format: Article
Language:English
Subjects:
Animals
Calcium - analysis
Cattle
Cattle - genetics
Clones
Cloning, Organism
Cryopreservation
Cryopreservation - veterinary
Embryonic and Fetal Development - genetics
Fertility - genetics
Fertilization in Vitro - veterinary
Genetic Variation
Hot Temperature
Male
Monozygotic
Semen - cytology
Sperm Count
Sperm Motility - genetics
Spermatozoa
Spermatozoa - chemistry
Spermatozoa - physiology
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Summary:Modern cloning methods have become an important technology in artificial insemination which is used to create and maintain pools of genetically superior bull semen. In this study, semen from four identical quadruplet bulls (Q1, Q2, Q3, and Q4) produced by blastomere separation was analyzed to evaluate the differences in reproductive potential, if any, that existed between the identical quadruplet siblings. Analysis of fresh semen collected from 1994 to 1996, showed lower progressive motility and lower sperm concentration for one bull (Q3) compared to his identical brothers (P
ISSN:0093-691X
1879-3231
DOI:10.1016/S0093-691X(02)01256-6