Production of interspecies chimeric calves by aggregation of Bos indicus and Bos taurus demi-embryos [Brahman; Friesian; Hereford-Shorthorn; Zebu; cattle]
1990
Williams, T.J. | Munro, R.K. (Commonwealth Scientific and Industrial Research Organisation, Rockhampton (Australia). Div. of Tropical Animal Production)
Of 112 recipients of 112 chimeric embryos, 29 (26 percent) were pregnant at 60 days. Of these, 24 (83 percent) produced full-term calves and 5 (17 percent) aborted between 2 and 5 months' gestation. From the 24 full-term pregnancies, 2 sets of twins and 22 singleton calves were born. Of the 22 singletons, 15 were chimeric including 6 bull calves (one Brahman-Friesian and 5 Brahman-HS) that were overt chimeras. All the overt chimeras resulted from aggregation of halves of early morulae (precompaction).
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