FGSC #2209

Reporting Genes: cr-2 al-2

Species: crassa

Allele: R2445 15300

Alternate Strain Number: R2445-7-308a

Depositor: ELT

Linkage Group: IR IR

Mating Type: a

Species Number: 10

ref1: Garnjobst & Tatum Genetics 66:281-290 1970, https://www.genetics.org/content/genetics/66/2/281.full.pdf

Genes

Locus	Cultural Requirements	Link Group	Type
al-2	IR. Right of os-5 (<1%) and T(STL76). Left of arg-6(1%) and al-1 (797, 802, 808, 816, 818). Included in duplications from Tp(T54M94), confirming location left of arg-6(808). (482) Carotenoids absent or abnormal, but steroids produced (398). Blocked in microsomal fraction and defective in phytoene synthetase (445), a particulate enzyme (445 and references cited therein) (Fig. 9). Tracer experiments indicate a lesion between prephytoene pyrophosphate and phytoene (572). Alleles include those resulting in white and pale rose-white, e.g., 15300 and Y254MI65 (1042), and purple, e.g., MN58a (154). For complementation, see references 500 and 1041. Fine-structure mapping (500, 1042) needs reevaluation because of new information on the location of the arg-6 marker (797).	IR	B
cr-2	IR. Right of cr-3 (11%) and T(NM103); hence, right of thi-1. Left of al-2(18%) (383, PB). Conidiation delayed. Fine, pale-pigmented conidia produced in clumps over the agar surface (383). Recessive. Reduced amount of cell wall peptides (1165). Overproduces and excretes NAD(P) glycohydrolase, but this is not cured by exogenous adenosine 3',5'-phosphate (533).	IR	B

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