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Development, Vol 105, Issue 1 137-145, Copyright © 1989 by Company of Biologists

JOURNAL ARTICLES

Influence of diandric and digynic triploid genotypes on early mouse embryogenesis

MH Kaufman, KK Lee and S Speirs
Department of Anatomy, University Medical School, Edinburgh, UK.

Standard micromanipulatory techniques were used to produce tripronucleate diandric and digynic triploid mouse conceptuses. When these were transferred to suitable recipients, most implanted. A wide range of embryonic stages from the primitive streak to the 15- to 25-somite stage were isolated in both triploid series in otherwise identical recipients. In the diandric triploid series, all of the embryos recovered appeared to be morphologically normal, but considerably smaller than fertilized embryos analysed at similar stages of development. This contrasts with the digynic triploid conceptuses which, though also ranging from the primitive-streak stage to about the 10- to 15-somite stage at the time of their isolation, generally showed poorer embryonic development than the diandric triploids, and were invariably morphologically abnormal. Unlike the situation observed in man, where the placentas of diandric triploid conceptuses commonly display widespread trophoblastic hyperplasia and form the characteristic 'partial' or 'incomplete' type of hydatidiform moles, the extraembryonic membranes of the diandric triploid mouse conceptuses (as well as the digynic triploids) did not appear to be grossly abnormal).


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© The Company of Biologists Ltd 1989