Sporulation of Deletion Diploids
The haploid histone H3-H4 deletion strains were next mated
to construct a set of three diploid yeasts. MSY164 is homozygous
for the deletion of the copy-I locus, while MSY165 is
homozygous for the deletion of the copy-II locus. The diploid
MSY167 is wild type for both of the histone loci. These
strains were examined for their ability to sporulate and all
three diploids were found to be able to sporulate on acetate
medium. No significant differences in the percentage of ascii
were observed; the results for each strain were 37.4 + 5.1
for MSY167, 33.5 + 4.3 for MSY164, and 39.1 5= 2.3 for
MSY165. The time course of sporulation was also the same
for the three strains.