Weeds, as ancillary hosts, pose disproportionate risk for virulent pathogen transfer to crops

Table 3 Bayesian estimates of scaled demographic parameters and 95 % highest posterior density (HPD) intervals of Rhynchosporium commune as estimated under an isolation with migration model (IMa2) using 14 microsatellite loci

Parameter	Mode	HPD95L	HPD95H
Effective population size (2N _i μ)
Barley	115.3	30.34	285.2
Barley grass	42.48	18.21	176
Ancestral	12131	11075	23451
Population migration rate (2 Nm)
From barley to barley grass	0.896	0.535	2.229
From barley grass to barley	4.164	2.939	7.840

Parameters are estimated from the peak location of the estimated probability densities. Population size and migration parameters are scaled by the mutation rate μ; N_i the effective size of population i; μ, the mutation rate; m, the migration rate per generation with one generation per year

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