Table 2.

Effect of ndj1 on allelic and ectopic meiotic recombination

Insert location	ndj1	NDJ1†	ndj1/NDJ1
Allelic recombination, f(ARG4) × 103*
LEU2	19	19	1.0
URA3	8.1	5.7	1.4
CHA1	5.0	4.7	1.1
PHO11	3.0	4.8	0.6
PHO12	1.3	1.6	0.8
MAT	7.4	9.4	0.8
Mean			0.9 ± 0.3
Ectopic recombination, Eab‡
On heterologous chromosomes
MAT × URA3	0.29	0.12	2.4
LEU2 × URA3	0.29	0.13	2.2
PHO11 × PHO12	0.51	0.24	2.1
PHO11 × CHA1	0.59	0.27	2.2
PHO12 × CHA1	0.57	0.28	2.0
Mean			2.2 ± 0.1
On homologs
LEU2 × CHA1	0.6	0.56	1.1
LEU2 × MAT	0.5	0.48	1.1
MAT × CHA1	0.62	0.4	1.6
Mean			1.3 ± 0.3

^*Arg⁺ spores/total spores from strains with URA3-arg4 inserts at allelic locations. 

^†Data from ref. 22. 

^‡ E_ab, efficiency of ectopic recombination (22). E_ab for a pair of insert loci is the sum of the ectopic recombination frequencies for both marker orientations divided by the sum of the two relevant allelic recombination frequencies, corrected for loss of recombinants on lethal crossover-associated rearrangements. For allelic inserts, E_ab = 1; E_ab < 1 indicates that two inserts recombine less frequently than would be expected if they were at allelic positions.