FGSC #4902

Mutant Type

Genus: N

reporting_genes: bd;prd-1

species: Neurospora crassa

allele: no#;no#

stock: 609-26

glasgow:

mutagen:

Depositor: JFF

Link Group: IVR;IIIC

MT: a

Species No: 10

gene_back: SL

oppmt: 0

trans:

ref1: Feldman & Atkinson 1978. Genetics 88:255-265, https://doi.org/10.1093/genetics/88.2.255

ref2:

site:

country:

ksudc_link: https://digital.lib.k-state.edu/item/neurospora-crassa/fgsc-4902

ksudc_link_html: https://digital.lib.k-state.edu/item/neurospora-crassa/fgsc-4902 ↗

Genes

Locus	Cultural Requirements	Link Group	Type
prd-1	III. Linked to acr-2 (5%), the centromere (0/35 asci), and pro-1(20%) (327; G.F. Gardner, personal communication). Altered period of circadian conidiation rhythm. One allele is known, which results in a 25.8-h period (at 25°C without csp) (327, 375). Recessive. Grows at 60% of wild-type rate. See reference 327 for period lengths of double mutants carrying frq-1, -2, and -3. Temperature compensation described (377). Name changed from frq-5 (375). For reviews of circadian mutants see references 326 and 328.	III	B
bd	Because dense bands of conidia are produced on appropriate solid medium at intervals of about 24 hr (1792, 1794), the mutant has been used extensively to study circadian rhythms (239, 560, 621, 1382, 1794). bd has no effect on the underlying clock mechanism, but allows the visible expression of rhythm (622). Grow rate is about 70% that of the wild type (232). Conidiation is enhanced, even on slants (232). CO2 inhibits conidiation and, thus, inhibits banding; bd is much less sensitive than wild type to this effect of CO2 (1792). Biotin starvation leads to a phenocopy in wild type and to increased persistence of banding in bd (2206). Originally identified in a bd; inv strain called "timex" (1791). bd alone is sufficient to cause banding (1794). Used to study conidiation under nonstarvation conditions (1820). Used in a study of morphological differentiation patterns such as concentric rings and radial zonations (528). Expression is affected by changing the concentrations of agar, sugar, and salts. Conidial scatter is eliminated in the double mutant bd; csp (239). Conveniently scored by conidial banding on agar in long tubes or large plates at 25oC in constant dark or in a dark-light cycle, but not in constant light (1791).	IVR	B