Fig. 5: Loss-of-function of qHMS1 is a recent evolutionary event.
From: A toxin-antidote system contributes to interspecific reproductive isolation in rice
a Coupling of the toxin HPT with the antidote HPA. Mutation of HPT and HPA was found in cultivated rice and its closest progenitor in Asia and Africa. Mutation of HPA is conditioned by mutated HPT. Loss or truncation of HPT is indicated by white bars with dotted line. Inactivation of HPA transcription due to the transposon insertion is indicated by white bars with black line. Shown in parenthesis is number of a given genotype over total accessions analyzed. b Predicted hybrid pollen sterility in combinations between the two qHMS1 alleles as a guide in breeding programs. The varieties with mutated HPT but functional HPA are considered having wide compatibility. The combination that produces pollen sterility is highlighted in red rectangle.
