Table II.

Genetic Analyses of Phototactic Mutant Strains

Isolation name		Allele designation		Ptx−/Mot− segregation*		Ptx−/Arg+ segregation‡		Map position
7-1		mia1-1		136		−		L.G. II (24:0:0 to act1)
13-5		mia2-1		119		−		L.G. XVIII (31:0:6 to spr1)
AT1-2		pf9-4		56		21		L.G. XII/XIII (32:0:0 to pf9)
AT1-25		ptm1-1		70		29		L.G. II (73:0:8 to fsr1)
AT2-121		ptm2-1		52		21		Unknown§
8-10		ptm3-1		102		−		L.G. XVIII (61:2:14 to spr1)
8-14		ptm3-2		43		−		L.G. XVIII‖
14-9		ptm3-3		25		−		L.G. XVIII‖

^* Number of tetrads in the phototaxis (Ptx⁻) and motility (Mot⁻) phenotypes segregated together and as 2⁺:2⁻.  

^‡ Number of tetrads in which the phototaxis (Ptx⁻) and arginine prototrophy (Arg⁺) phenotypes segregated together and as 2⁺:2⁻.  

^§ This mutation did not show linkage to other genetic markers, but was centromere linked based on mapping to ac17 (8:7:0) and pyr1 (10:5:0).  

^‖ These mutations were not directly mapped because complementation and recombination analyses described in the text showed that they were allelic with the ptm3-1 mutation.