EVOLUTION Correction for “Evolution of host range in Coleosporium ipomoeae, a plant pathogen with multiple hosts,” by Thomas M. Chappell and Mark D. Rausher, which appeared in issue 19, May 10, 2016, of Proc Natl Acad Sci USA (113:5346–5351; first published April 25, 2016; 10.1073/pnas.1522997113).
The authors note that the legends for Fig. 3 and 4 appeared incorrectly. The figures and their corrected legends appear below.
Fig. 3.
Means and SEs of infectivity (proportion of replicate plants infected) for four different treatments. WS, same host, same location; WD, different host, same location; BS: same host, different location; BD, different host, different location. All pairs of treatments are significantly different (P < 0.001) except WS-BS in post hoc Tukey–Kramer comparisons.
Fig. 4.
Model of evolutionary changes in pathogen and host specificities leading to high host specificity in the pathogen. αi and βj represent genotypes of two pathogen elicitors. Ai and Bj represent genotypes of R-genes in a given host. The genes in the three hosts are not necessarily orthologous. Subscripts represent specificities. Pathogen genotypes are diploid, but are shown as haploid for convenience and should be interpreted as homozygous at each locus. If the subscript of α matches the subscript of A, or if the subscript of β matches the subscript of B, then the pathogen is avirulent (plant is resistant). Otherwise the pathogen is virulent (plant is susceptible). A–F represent successive evolutionary changes. The specific changes are indicated by red subscripts. Pathogen genotypes in red indicated genotypes introduced to the community either by immigration or mutation. Pathogen genotypes directly above host genotype are virulent on that host. (A) No pathogens are originally present, and a new pathogen genotype is introduced by immigration. This genotype is virulent on all host species. (B) Host species 1 and 3 evolve resistant genotypes, leading to avirulence of the pathogen on these hosts. (C) A new pathogen genotype immigrates or is produced by mutation. (D) Evolution of a novel resistance allele in Host 2 makes the new resistant to the new pathogen genotype. (E) A new pathogen genotype immigrates, and is initially virulent on all three host species. (F) Host species 1 and 2 evolve new resistance genotypes, making the new pathogen genotype avirulent. At this stage, the three pathogen genotypes are each virulent on only one host species. Table S2 shows that pathogen genotypes derived from these by recombination are also all virulent on at most one host species.