Genetics of Glomerella. Vii. Mutation and Segregation in Plus Cultures

Analysis of the MAT1-2-1 gene of Colletotrichum lindemuthianum

“…In homothallic ascomycetous strains, a single individual normally contains both MAT1-1 and MAT1-2 idiomorphs (Coppin et al 1997;Turgeon 1998;Poggeler 2001). However, a series of articles (Edgerton 1914;Lucas et al 1944;Wheeler et al 1948;Chilton and Wheeler 1949;Wheeler 1954) on Glomerella cingulata (Stoneman) Spauld & Schrenck (anamorph: Colletotrichum gloeosporioides (Penz.) Sacc.)…”

Speciation and Population Biology in Colletotrichum

“…Bipolar mating was first reported in Glomerella by Edgerton (1912, 1914. Tn the 1940s and 1950s, several studies on the genetics of mating of G. cingulata isolated from morning glory, apple, and tomato were conducted (Huttig 1935;Lucas et al 1994;Edgerton et al 1945;Chilton et al 1945;Chilton and Wheeler 1949;Struble and Keitt 1950;Wheeler and McGahan 1952). Edgerton (1914) described the production of a ridge of fertile perithecia forming between two isolates when coinoculated on the same petri dish.…”

“…These variants crossed with + and -isolates, and results of the crosscs indicated a singlc gene A with two alleles (A + and AI) determining the switching from a perithecial to conidial form. Chilton and Wheeler (1949) noted that clumped conidial genotypes (AlB +) are very similar to the nonascogenous Colletotrichum forms isolated from many host plants, and Bryson et al (1992) concluded that many Colletotrichum species are naturally mutated at a gene equivalent to A. Chilton and Wheeler (1949) noted that clumped conidial genotypes (AlB +) are very similar to the nonascogenous Colletotrichum forms isolated from many host plants, and Bryson et al (1992) concluded that many Colletotrichum species are naturally mutated at a gene equivalent to A.…”

Genetics of Glomerella. X. Genes Affecting Sexual Reproduction

“…Andes (1941), working with isolates from apple, used the terms "light" and "dark" for Edgerton's "plus" and "minus." Edgerton et al ( 1945) introduced the term type to group "strains" of an isolate from Ipomoea which differed in some respects but were in general similar. They distinguished two "strains" of the plus type (plus A and B) and two of the minus type (minus A and B).…”

“…They distinguished two "strains" of the plus type (plus A and B) and two of the minus type (minus A and B). Chilton et al (1945) and Chilton and Wheeler (1949a) differentiated four cultural types plus, minus, conidial A, and conidial B, each of which included one or more "strains" and assigned genotypic symbols to the genes controlling macroscopic cultural characters and mating reactions in these four types which were derived from the Ipomoea isolate. Andes and Keitt (1950) used the term type "to refer to the plus or minus nature of a culture" and restricted the use of the term strain "to denote a monosporic isolate from nature, including all its sub-cultures."…”