Table 1. Recombination rates and interinterval interference.

Type	Intervals	N° of Tetradsc	d (CM)d	d ratio (axr1/wt)e	NPD Ratiof	p (NPDr = 1)g
Wt	I5aa	3,118	24.2	—	0.27	<10−12
	I5ba	3,118	15.5	—	0.37	<10−3
	I5ab	1,899	27.9	—	0.27	<10−11
	I5bb	1,899	16.7	—	0.27	<10−3
	I5d	8,947	8.6	—	0.21	10−5
	I5c	8,947	8.9	—	0.35	<10−3
	I3c	10,245	4.8	—	0.43	0.1
	I3b	10,245	17.0	—	0.30	<10−18
axr1	I5aa	1,263	17.0	0.7**	2.69	<10−7
	I5ba	1,263	23.7	1.5**	1.63	<10−2
	I5ab	1,107	24.4	0.9*	1.47	0.05
	I5bb	1,107	29.9	1.8**	1.18	0.05
	I5d	2,274	9.1	1.1	0.82	0.9
	I5c	2,274	8.8	1.0	0.74	0.7
	I3c	1,499	4.9	1.0	1.24	0.9
	I3b	1,499	20.9	1.2**	1.24	0.4

^{a, b}Correspond to the data obtained for two independent experiments for intervals I5a and I5b.

^cOnly four-spore viable tetrads were considered. They correspond to 97% of the tetrads (n = 3,756) in wild type and 10% of the tetrads (n = 5,973) for axr1.

^dMap distances were calculated using the Perkins genetic map equation [51] using raw data from Table S3B.

^eGenetic distance ratio between axr1 and wild type. It compares recombination rates between the two genotypes. Asterisks indicate significant differences between mutant and wild type (* p<0.05; ** p<0.01).

^fRatio between the observed number of double COs (based on NPD tetrad frequency) to the expected number of double COs under the hypothesis of no interference (see Table S5). The NPDr gives the strength of interference within the considered interval (no interference if the NPDr is equal to 1, absolute interference if the NPDr is equal to 0, negative interference if the NPDr is above 1).

^gThe p values indicate significant differences between IR and 1.