Four-spore-1

locus: Fsp-1

locus_name: Four-spore-1

organism_type: B

chromosome_number: II

chromosome_side: R

link_group: IIR

cultural_requirements: IIR. Right of pe (4%) (D.D. Perkins, unpublished data).Some of the asci contain four large ascospores rather than the normal eight. In these asci, ascospores are formed at the four-nucleate stage after meiosis II. Dominant, with variable penetrance depending on genetic background. Ascospores from four-spored asci produce homokaryotic cultures. Rarely, three-spored or two- spored asci are formed, and these include some heterokaryotic ascospores. One postmeiotic mitosis is omitted in the four- and three-spored asci, and two divisions are omitted in the two-spored asci. Vegetative morphology is normal. (856) Used in the study of Sk (Spore killer) (857). The cytological basis of Fsp-1 is distinct from that in N. tetrasperma. For a description of a dominant eight-spored mutant of N. tetraspermasee reference 129.

enzyme_id: 202

Enzyme: none

anid_name:

near_l: pe (4%)

near_r:

neu_name:

supplement:

image_url:

Strains

FGSC #	Reporting Genes	Species
FGSC #2991	Fsp-1	crassa
FGSC #2992	Fsp-1	crassa
FGSC #4702	Fsp-1;Fsp-2;Sk-2k	crassa
FGSC #4703	Fsp-1;Fsp-2;Sk-2k	crassa
FGSC #5069	Fsp-1;Fsp-2	crassa
FGSC #5070	Fsp-1;Fsp-2	crassa

References

Authors	Title	Year
Raju, N. B.	A four-spored mutant of Neurospora crassa.	1979
Raju, N. B.	Cytogenetic behavior of spore killer genes in Neurospora.	1979