The invention provides a peanut
fruit rot resistance evaluation method based on plot
plant morbidity (PPIR), and belongs to the technical field of
disease-resistant breeding. The invention establishes an efficient, stable and reliable peanut
fruit rot resistance evaluation method, and by introducing a PPIR-based resistance evaluation method and a resistance grade range, the
evaluation result is more objective and efficient, and the
workload is reduced; the stability of the resistance
evaluation result is guaranteed by exploring the optimal
attack condition of the peanut
fruit rot; by introducing an interior
label variety, a reference standard for resistance evaluation is added, so that judgment and
verification are facilitated, and the reliability of a resistance
evaluation result is improved; by introducing a correction formula to plots with different
disease degrees, the resistance evaluation range is expanded. According to the invention, a stable, efficient and repeatable peanut fruit rot resistance evaluation standard based on the incidence rate of plot plants is established, the resistance evaluation
workload is greatly reduced, the evaluation result is objective, and a foundation can be laid for breeding and utilization of fruit rot resistant peanut varieties.