Table 1. S-RNase alleles isolated from Coffea and Psilanthus.

Species	Distribution	SI/SC	Plants Sampled	S-RNase Alleles
C. andrambovatensis	E. Madagascar	SI	4	S1, S4, S8, S21, S36, S37
C. bonnieri	N. Madagascar	SI	3	S13, S25, S26, S27, S45
C. millotii	E. Madagascar	SI	8	S8, S10, S17, S18, S19, S32, S33
C. montis-sacri	E. Madagascar	SI	4	S9, S13, S18, S21, S24, S34
C. perrieri	W. Madagascar	SI	11	S11, S12, S13, S15, S16, S26
C. resinosa	E. Madagascar	SI	7	S1, S4, S10, S13, S25, S28, S29, S51
C. tricalysoides	N. Madagascar	SI	2	S11, S38, S39
C. tsirinananae	N. Madagascar	SI	5	S6, S7, S8, S9, S10, S49
C. brevipes	Tropical W. Africa	SI	1	S1
C. canephora	Tropical W. and central Africa	SI	3	S3, S17, S27, S41, S42
C. eugenoidoides	Tropical central Africa	SI	4	S1, S4, S13
C. pseudozanguebariae	Tropical E. Africa	SI	1	S7, S38
C. arabica	Tropical NE Africa	SC*	1	S1, S2**, S3
C. heterocalyx	Tropical W. Africa	SC	4	S12
P. ebracteolatus	Tropical W. Africa	SC	1	PS1

*SC likely the result of allotetraploid origin (i.e. 2n = 44).

**Short message length indicates that this is likely pseudogene copy.