TABLE 3.

The proportion of shared polymorphic sites in the S-locus genes of B. rapa and B. oleracea

Genesa	No. of polymorphic sites (S1)b	No. of shared polymorphic sites (S2)b	S2/S1	P-valuec
SRK (S domain)	307	221	0.720	—
SRK (kinase domain)	186	141	0.758	NSd
SLG	304	187	0.615	NSd
AtPPa	112	0	0.000	P < 10−22
SLL2	80	13	0.163	P < 10−6
SP2	57	6	0.105	P < 10−7

^aSP11 was not included because lengths of SP11 were short (∼200 bp).

^bNumber of polymorphic sites and number of shared polymorphic sites were counted in coding regions.

^cP-values were obtained by Fisher's exact test comparing the proportion of shared polymorphic sites of the S domain.

^dNot significant.