In Botswana it is common practice to rear goats (Capara hircus) and sheep (Ovis aries) together in one kraal. Under such conditions it is also not uncommon to see the two species mating, but such matings have never been reported to produce a viable offspring. In this field observation a viable offspring was born naturally from a mating between a female goat and a male sheep. Chromosomal analysis showed that the hybrid had 57 chromosomes, intermediate between the 60 possessed by its dam and the 54 possessed by its sire. In August 1999 the hybrid was five years old.
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http://dx.doi.org/10.1136/vr.146.25.732 | DOI Listing |
J Exp Biol
January 2025
School of BioSciences, Bio21 Institute, The University of Melbourne, Parkville, Victoria 3010, Australia.
Insect Biochem Mol Biol
January 2025
College of Plant Protection, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China; Key Laboratory of Economical and Applied Entomology of Liaoning Province, China; Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, 110866, Liaoning, China. Electronic address:
Front Endocrinol (Lausanne)
December 2024
Department of Assisted Reproduction, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Background: Techniques for sperm cryopreservation have exhibited their potential in male fertility preservation. The use of frozen-thawed sperm in fertilization (IVF) cycles is widespread today. However, many studies reported that cryopreservation might have adverse effects on sperm DNA integrity, motility, and fertilization, probably due to cold shock, intra- and extracellular ice crystals, and excess reactive oxygen species (ROS).
View Article and Find Full Text PDFMar Biotechnol (NY)
December 2024
MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China.
Triploids are widely used to rapidly achieve genetic improvements of organisms due to their fast growth and enhanced environmental adaptability. Artificially induced triploids are generally considered to be infertile owing to the obvious inhibition of gonadal development. Recently, some fertile individuals with reduced advantages have been found in triploid bivalves, which is a notable deviation from the original intention of artificially inducing triploids.
View Article and Find Full Text PDFInt J Dev Biol
December 2024
Department of Embryology, Institute of Developmental Biology and Biomedical Sciences, Faculty of Biology, University of Warsaw, Warsaw, Poland.
Aggregates of two mouse embryos produce viable offspring of normal size, indicating that there are mechanisms in the embryo that can downregulate their size to the size of the corresponding normal (single) embryos. Very little is known about the mechanisms controlling compensation for increased preimplantation size. Also, it is still elusive when exactly during development chimeric embryos regulate their size.
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