Chromosome abnormalities in early embryos of the pig

This report presents the results of chromosome analysis of blastocysts collected and processed as previously described (McFeely, 1966) from seven gilts selected at random from the swine herd at the University of Pennsylvania. No records of parentage of the gilts were available, but as they consisted of various breeds and cross breeds from a variety of sources, it was assumed that they were not closely related. Two unrelated, pure bred, Yorkshire boars were used as sires. Chromosome analysis of peripheral blood leucocytes from all of the pigs did Table 1 chromosome analysis of 10-day blastocysts No. of corpora lutea No. of blastocyst