TABLE 2.

Nucleotide diversity among a subset of sorghum accessions with complete data on a gene-per-gene basis, for the six genes under survey

								Summary statisticsa
Polymorphism						Nucleotide diversity
Species	Gene	N	Portion	Length (bp)	No. IDP	No. polymorphic sitesb	SNP frequency	π (10−3)	θ (10−3)	Tajima's D testc
Sorghum	Sh2	153	NC	849	2	19		0.98	4.16	−2.385**
			C	482	0	2s:1c		0.78	1.64	−1.063
			Total	1331	2	22	1/60	0.91	3.31	−2.314**
Maize (Whitt et al. 2002)	Sh2	30	—	6754	NA	NA	NA	5.0d	NA	NA
Maize (Manicacciet al. 2006)	Sh2	50	—	4669	18	69	1/68	3.6d	3.9	−0.596
Sorghum	Bt2	184	NC	472	2	6		0.74	1.41	−0.974
			C	536	0	0		0.00	0.00	—
			Total	1008	2	6	1/168	0.34	0.66	−0.974
Maize (Whitt et al. 2002)	Bt2	30		6098	NA	NA	NA	2.3d	NA	NA
Sorghum	SssI	166	NC	996	3	7		1.10	1.58	−0.790
			C	529	0	2s		0.47	0.85	−0.792
			Total	1525	3	9	1/169	0.93	1.34	−0.834
Sorghum	Ae1	154	NC	955	8	14		4.42	2.41	2.391*
			C	422	0	5s:3c:3nc		3.83	1.91	2.071*
			Total	1377	8	25	1/55	4.26	2.27	2.625*
Maize (Whitt et al. 2002)	Ae1	30		6781	NA	NA	NA	2.9d	NA	NS
Sorghum	Wx	129	NC	1162	5	21		6.57	3.63	2.532*
			C	1105	0	5s:1c:1nc		1.87	1.34	1.006
			Total	2267	5	28	1/81	4.21	2.48	2.268*
Maize (Whitt et al. 2002)	Wx	30	—	2978	NA	NA	NA	11.5d	NA	NA
Barley (Kilian et al. 2006)	Wx	45	—	816	NA	10	1/82	3.32e	7.874	−0.95 NS
Rice (Olsen et al. 2006)	Wx	73	—	5300	NA	101	1/52	5.6d	na	0.499
Sorghum	O2	146	NC	2707	9	38		1.92	3.11	−1.271
			C	1064	0	1s:7c:4nc:1ns		1.00	2.41	−1.683
			Total	3771	9	51	1/74	1.65	2.91	−1.461
Maize (Henry and Damerval 1997)	O2	21	—	1800	26	258	1/11	NA	52.2d	NA
Maize (Henry et al. 2005)	O2	33	—	1976	72	106	1/18	23.3d	27.1d	−0.657

N, number of accessions; C, coding portion; NC, noncoding portion; NA, not available. *P < 0.05; **P < 0.01.

^aOn a subset of 53 representative accessions with complete data for all gene segments.

^bs, synonymous; c, nonsynonymous conservative; nc, nonsynonymous nonconservative; ns, nonsense (CAG/TAG).

^cNS, nonsignificant.

^dBased on silent sites.

^eAll sites considered.