Evolution of meiotic recombination genes in maize and teosinte

Table 2 Results of frequency spectrum-based tests to detect selection patterns in coding regions of recombination genes in maize

Gene	Length (bp)	N	Fu & Li D		Fu & Li F		Tajima’s D
			Value	Percentile of CS-generated distribution^a	Value	Percentile of CS-generated distribution^a	Value	Percentile of
			Value	Percentile of CS-generated distribution^a	Value	Percentile of CS-generated distribution^a	Value	empirical distribution^b	CS-generated distribution^a
Dmc1	1035	30	1.73842	94.0	1.8524	84.3	−0.50340	44.4	14.2
Mlh1	1589	26	−1.98286	1.3	−2.14871	1.5	−1.36469	4.7	3.7
Mre11A	2121	29	−0.78960	7.1	−0.86882	6.5	−0.57980	24.9	12.6
Mre11B	1792	31	−2.54110	0.1	−2.74082	0.4	−1.74966	6.4	1.5
Msh4	2415	31	1.82793	91.0	2.14002	87.5	1.65970	82.5	74.4
Mus81-1	1353	27	−0.45244	17.0	−0.51995	12.1	−0.39346	46.2	17.3
Rad51A1	1023	30	1.39229	91.5	1.22880	67.7	0.24754	38.1	33.3
Rad51A2	658	30	0.90418	40.0	1.73702	75.7	2.61602	99.9	96.5
Recq4	3528	22	1.54931	64.5	1.13756	42.5	−0.27752	10.2	18.9
Spo11-1	1158	30	0.70282	35.1	0.07890	18.3	−0.72935	27.5	10.0
Spo11-2	854	29	1.71266	90.0	1.38134	60.2	−0.01630	47.1	23.8

^a Percentile relative to a distribution of test values generated by coalescent simulations (CS) assuming neutral evolution and a domestication bottleneck
^b Percentile relative to the genome-wide distribution of Tajima’s D values from a survey of 703 random polymorphic loci in maize and Z. mays ssp. parviglumis by White et al. [22]. Tajima’s D values used in the comparison were calculated based only on the 14 inbreds used in the White et al. study [22]