FGSC #3607

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Reporting Genes: met-7 met-9 wc-1

Species: crassa

Allele: NM331 NM43(t) P829

Alternate Strain Number: #7102

Depositor: AR

Linkage Group: VIIR R R

Mating Type: A

Species Number: 10

ref1: Murray, N. 1970 Genetical Research 15:109-121, https://doi.org/10.1017/s0016672300001415

Deposit Sheet ↗

Genes

Locus	Cultural Requirements	Link Group	Type
met-7	VIIR. Right of qa-2 (<1%), ars (<1%), and the centromere (one second-division ascus in several hundred). Left of met-9 (10[-4]) and wc-1 (1 to 4%) (146, 725; M.E. Case, personal communication). (718; M.K. Allen, cited in references 718 and 789) Uses cystathionine, homocysteine, or methionine (718; N. H. Horowitz, cited in reference 1180). Lacks cystathionine-gamma-synthase (547) (Fig. 17). This enzyme is also lacking in the mutant met-3 (547). See met-3 for regulation. Apparently contiguous with met-9by coconversion. Flanking markers are recombined in most met-7+ met-9+ recombinants (725). Functionally distinct from the mutant met-9, which has active cystathionine-gamma-synthase (547) but cannot use homocysteine. No mutants lacking both functions have been isolated. Allele NM251 is suppressible by supersuppressor RN33 (same as ssu-1?) (725). Allele K79 is inseparable from reciprocal translocation T(I;VII)K79 (808).	VIIR	B
met-9	VIIR. Between met-7 (10[-4]) and wc-1 (1 to 2%) (725). (815) Requires methionine; cannot use precursors (290, 718, 725). Apparently contiguous with met-7, q.v. (725). Functionally distinct from met-7. The mutant met-9 retains the met-7+ function, producing cystathionine-gamma-synthase (547). Allele NM43 is heat sensitive (725).	VIIR	B
wc-1	VIIR. Right of met-9 (1 to 4%). Left of un-10 (7%) and for (6%) (724, 812, 816). Carotenoids absent from mycelia; conidia become pigmented with some delay. Named because nonconidiating rim at top of agar slant remains white. A double mutant with flor other nonconidiating mutant would be classed as albino. Regulatory mutants for photoinduced carotenogenesis via blue light receptor might be expected to have a similar phenotype (444, 445). A blue light treatment (given in vivo), which increases the activity of soluble and microsomal enzymes required for phytoene biosynthesis in the wild type, does not do so in the mutant wc-1 (445). Fails to show phototropism of perithecial beaks when used as the female (protoperithecial) parent, but not when used as the male (fertilizing) parent (R. W. Harding, personal communication). Useful genetic marker (725, 800). Scoring clearest at high temperatures (34 C).	VIIR	B