FGSC #4630

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Reporting Genes: acr-3 nic-1;pdx-1

Species: crassa

Allele: KH14(r) S1413 37803

Alternate Strain Number: 103M7

Depositor: JFL

Linkage Group: IL IR;IVR

Mating Type: a

ref1: https://doi.org/10.1007/BF02424417

Deposit Sheet ↗

Genes

Locus	Cultural Requirements	Link Group
acr-3	IL. Between un-16 (1 to 5%) and suc (1 to 5%). Probably right of ta (816; PB). (498)Resistant to acriflavine and to malachite green (three alleles tested). Not resistant to 3-aminotriazole. Resistance is probably dominant (heterokaryon tests) (498). Scoring is clear-cut with uniform inocula of appropriate size. False-negative or false-positive scoring may result if test inocula are too small or too large. May show delayed resistance: read tests at 2 and 4 days, 34°C. Use acriflavine at 10 µg /ml in minimal agar at 34°C (816) and malachite green at 2 µg /ml (498).	IL
nic-1	IR. Right of ace-3 (<1%), lys-1 (1%), and In(OY323). Left of os-1(10 to 29%) (2, 57, 131, 578, 789, 816, 907). (482) Uses nicotinic acid or nicotinamide, but not precursors (97, 100) (Fig. 18). Accumulates quinolinic acid (100). Used to study intralocus recombination (907). Called the q locus.	IR
pdx-1	IVR. Right of pyr-1 (<1 to 10%). Left of T(S1229) and pt (2%) (40, 55, 692, 808). (482) Uses pyridoxine, pyridoxal, or pyridoxamine (843, 845, 846). Shows intralocus complementation (845, 846) and recombination (848), Provided the first proven example of gene conversion (686). Scoring is sharpened by addition of 100 mg of desoxypyridoxine per liter (845). Several alleles (called pdxp: e.g., 44602) are pH sensitive and can grow without pyridoxine on medium containing ammonium ions at a pH above 6 (1029). Conidia are subject to death by unbalanced growth on minimal medium (1033). A yellow pigment is excreted under certain conditions by the pdx-1;En(pdx) double mutant; see En(pdx). Allele 44204 originally called pdx-2 (see reference 848).	IVR