Heterocaryosis in Neurospora crassa

Author: Holloway, Bruce William

Year: 1953

Degree: Dissertation (Ph.D.)

Advisors: Beadle, George Wells; Emerson, Sterling

Committee Member: Unknown, Unknown

Option: Biology

DOI: 10.7907/VRRH-S044

Abstract

It has been shown that heterocaryon formation between certain biochemical mutants of Neurospora crassa is controlled by a number of genes apart from the biochemical mutant genes concerned. Genetic control of heterocaryosis has been shown for several different combinations of mutants. A detailed investigation of the heterocaryon formed between a mutant requiring pantothenic acid and one requiring lysine has demonstrated four and possibly five genes to be concerned in the process of heterocaryon formation. These genes may not only prevent the formation of a heterocaryon but also modify the type of heterocaryotic growth. The characters so affected are the time at which heterocaryotic growth commences, the ability to maintain heterocaryotic growth and the vigor of the growth. The possible mode of action of such genes has been discussed.

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