Fig. 1From: Genetic mapping of Pinus flexilis major gene (Cr4) for resistance to white pine blister rust using transcriptome-based SNP genotypingDisease phenology on Pinus flexilis seedlings with rust inoculation at 5-months old. a Needle lesions (spots) at 3Â months post-inoculation (MPI); b Spermatia (pycnia) evident at 10 MPI, with arrows indicating pycnian drops; c Susceptible seedling killed by rust; d Resistant seedling growing in the 2nd yearBack to article page