Multiple recombinational events within the84 Wlocus ofAscorolus immersus

Abstract

Multiple recombinational events within a gene were studied, by tetrad analysis of multipoint intragenic crosses. It was found that a considerable proportion of double-site conversions can arise as two separate but correlated events. The same was true for conversion and crossing-over associated with it. The data point to a possibility of multiple recombinational events involving both conversions and cross-overs, occurring as successive rounds of recombination within a single recombinational process. Some of the results suggest that more than two chromatids may be involved in such a process. The results are discussed in terms of different recombination models.