AN EXAMPLE OF POLYPLOIDY IN PIG BLASTOCYSTS

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Authors:
R. G. MOON
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M. N. RASHAD
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M. P. MI
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DOI:
https://doi.org/10.1530/jrf.0.0450147
Volume/Issue:
Volume 45: Issue 1
Page Range:
147–149
Article Type:
Research Article
Online Publication Date:
Oct 1975
Free access

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Pig Research Institute, Chunan, Taiwan, Republic of China, and Department of Genetics, University of Hawaii, Honolulu, Hawaii 96822, U.S.A. (Received 4th February 1975)

Cytogenetic data on mammalian preimplantation zygotes are limited. Blastocysts of pigs, rabbits and mice have been described as having chromosome abnormalities. Most of the reported abnormalities in mammalian blastocysts were triploid and tetraploid (Shaver & Carr, 1967, 1969; McFeely, 1967; Fechheimer & Beatty, 1974). Two instances of hexaploidy were found in mice (Beatty, 1957). In rabbits, one pentaploid and octaploidy in two mixoploids (2n/4n/8n) were found by Shaver & Carr (1967).

This communication describes an observation of polyploidy in pig blastocysts. A 5-year-old Landrace × Large White crossbred sow which had produced a total of eleven litters was available for study. She had first conceived at 12 months of age, but produced four mummified fetuses (due to Japanese encephalitis) after 100 days

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Print ISSN:
1470-1626
Online ISSN:
1741-7899