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Genetics of the Fungi

Genetics of the Fungi By CARL C. LINDEGREN Department of Biological Science and Research, Southern Illinois University Carbondale, Illinois MUCORS Genetics of the fungi takes its origin from the discovery by Blakeslee ( 1) that copulation between two thalli of opposite mating types precedes the formation of zygospores in Rhizopus. It is pref­ erable to call this a mating type difference, instead of a sexual difference, for later work on the Basidiomycetes revealed that two pairs instead of a single pair of genes control mating type speci­ ficity, which leads to the obvious contradiction that there are four sexes in this class. Furthermore, work with Neurospora showed that mating type specificity is superimposed upon true sex, true sex being defined as the existence of male and female sex organs. In view of these complications, the term "sex" should be reserved for sex organs and the term "mating type" for genetic differences controlling cross-copulation or self-sterility. Blakeslee & Cartledge (54) found intermediate mating type re­ actions. Satina & Blakeslee (55) showed that one mating type was somewhat richer in reducing substances than the other. Burgeff (2) collected over twenty variants of Phycomyces Blakesleeanus and analyzed the results of hybridizing these mutants. The Phycomy­ http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Microbiology Annual Reviews

Genetics of the Fungi

Lindegren, C C
Annual Review of Microbiology , Volume 2 (1) – Oct 1, 1948
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Publisher
Annual Reviews
Copyright
Copyright 1948 Annual Reviews. All rights reserved
Subject
Review Articles
ISSN
0066-4227
eISSN
1545-3251
DOI
10.1146/annurev.mi.02.100148.000403
pmid
18122245
Publisher site
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Abstract

By CARL C. LINDEGREN Department of Biological Science and Research, Southern Illinois University Carbondale, Illinois MUCORS Genetics of the fungi takes its origin from the discovery by Blakeslee ( 1) that copulation between two thalli of opposite mating types precedes the formation of zygospores in Rhizopus. It is pref­ erable to call this a mating type difference, instead of a sexual difference, for later work on the Basidiomycetes revealed that two pairs instead of a single pair of genes control mating type speci­ ficity, which leads to the obvious contradiction that there are four sexes in this class. Furthermore, work with Neurospora showed that mating type specificity is superimposed upon true sex, true sex being defined as the existence of male and female sex organs. In view of these complications, the term "sex" should be reserved for sex organs and the term "mating type" for genetic differences controlling cross-copulation or self-sterility. Blakeslee & Cartledge (54) found intermediate mating type re­ actions. Satina & Blakeslee (55) showed that one mating type was somewhat richer in reducing substances than the other. Burgeff (2) collected over twenty variants of Phycomyces Blakesleeanus and analyzed the results of hybridizing these mutants. The Phycomy­

Journal

Annual Review of Microbiology – Annual Reviews

Published: Oct 1, 1948

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