TABLE 1.

Nucleotide diversity among genes in the B. rapa S-locus complex

Pair of S haplotypes	Total length (bp)	Exon (bp)	Intron (bp)	πa	πNb	πSc	πN/πS	πIntd
SP6
S8 vs. S46	5662	3159	2503	0.1909	0.0867	0.1882	0.4607	0.3040
S8 vs. S54	6174	3645	2529	0.1521	0.0459	0.1405	0.3267	0.2768
S46 vs. S54	5979	3105	2874	0.0896	0.0641	0.1444	0.4439	0.1033
AtPPb
S8 vs. S46	1204	786	418	0.0324	0.0367	0.0360	1.0194	0.0263
S8 vs. S54	1184	786	398	0.0515	0.0336	0.0547	0.6143	0.0804
S46 vs. S54	1775	786	989	0.1797	0.0072	0.0169	0.4260	0.3145
AtPPae
S8 vs. S46	1213	NA	NA	0.0701	NA	NA	NA	NA
S8 vs. S54	1253	1059	194	0.012	0.0117	0.0216	0.5417	0.0000
S46 vs. S54	1213	NA	NA	0.0816	NA	NA	NA	NA
SRK (S domain) (first intron)
S8 vs. S46	6647	1305	5342	0.0241	0.0780	0.1735	0.4496	0.0073
S8 vs. S54	5587	1296	4291	0.1353	0.1393	0.2350	0.5928	0.1326
S46 vs. S54	5624	1299	4325	0.1385	0.1464	0.2660	0.5504	0.1338
SRK (kinase domain) (second to sixth intron)
S8 vs. S46	1764	1269	495	0.0023	0.0011	0.0000*	NA	0.0061
S8 vs. S54	1767	1263	504	0.0113	0.0077	0.0145	0.5310	0.0159
S46 vs. S54	1758	1263	495	0.0125	0.0065	0.0149	0.4362	0.0222
SP11
S8 vs. S46	1445	213	1232	0.4215	0.2338	0.2100	1.1135	0.4602
S8 vs. S54	506	204	302	0.5217	0.6062	0.9571	0.6334	0.5795
S46 vs. S54	486	213	273	0.3663	0.6174	0.9170	0.6733	0.3114
SLGf
S8 vs. S46	1305	1305	0	0.0238	0.0167	0.0465	0.3591	NA
S8 vs. S54	1305	1305	0	0.1379	0.1252	0.2526	0.4956	NA
S46 vs. S54	1305	1305	0	0.1372	0.1269	0.2385	0.5321	NA
SLL2g
S8 vs. S46	2218	1011	1207	0.0000	0.0000	0.0000*	NA	0.0000**
S8 vs. S54	2218	1011	1207	0.0266	0.0040	0.0691	0.0579	0.0323
S46 vs. S54	2218	1011	1207	0.0266	0.0040	0.0691	0.0579	0.0323
SP2g
S8 vs. S46	1540	705	835	0.0000	0.0000	0.0000*	NA	0.0000*
S8 vs. S54	1519	705	814	0.0592	0.0056	0.0939	0.0596	0.0885
S46 vs. S54	1519	705	814	0.0592	0.0056	0.0939	0.0596	0.0885

*P < 0.05, **P < 0.01; computed from the probability distribution of the number of mutations using equation (10) in Hudson (1991) and assuming θ_neu = 0.0967.

^aNucleotide diversity per site.

^bNucleotide diversity per nonsynonymous site.

^cNucleotide diversity per synonymous site.

^dNucleotide diversity in intron per site.

^eNot applicable because BrAtPPa-46 is a pseudogene.

^fNot applicable because of a lack of an intron.

^gNot applicable because π_S was zero.