Transreplication and Crossing Over in Sordaria fimicola

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Science  08 Sep 1961:
Vol. 134, Issue 3480, pp. 668-669
DOI: 10.1126/science.134.3480.668


A study of the segregation of markers closely linked to the gray ascospore color locus in Sordaria fimicola reveals that there is a high incidence of crossing over very near the locus when it transreplicates, which is much more pronounced in 5:3 than in 6:2 asci. Also, a single 7:1 and several aberrant 4:4 asci are described. At a different spore color locus, transreplication yields only 6:2 ratios, while other spore color loci fail to transreplicate altogether