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Journal of Cell Science, Vol 6, 669-678, Copyright © 1970 by Company of Biologists

Submitted on October 15, 1969

Genetic Recombination in Coprinus

II. Its Relations to The Synaptinemal Complexes

B. C. LU 1

1 Department of Botany, University of Guelph, Guelph, Canada

The frequency of genetic recombination in Coprinus lagopus may be modified by heat and cold shock. By removal of samples from a fruiting body before and after temperature treatment, it is possible to study the ultrastructure of chromosomes at the time recombination frequency (between den+ x +me-1) can be modified. The sensitive period for temperature effects and, therefore, probably the time of crossing over, commences with the formation of the synaptinemal complex (S.C.) and ends with its disappearance, i.e. during the entire existence of the S.C. It is concluded that recombination is an event subsequent to the formation of the S.C. and is independent of the process of its formation. It is suggested that the event takes place at the synaptic centre.

Submitted on October 15, 1969




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© The Company of Biologists Ltd 1970