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Phenotype identification of rice seedling resistance. (a) The phenotypic changes in TN1 rice (sensitive) seedlings inoculated with BPH nymphs after 0, 4, 8, and 12 days (the left tray); the right tray was treated without nymphs as a control. (b) Grading of rice seedling resistance to BPH. (c) Grading of the rice seedling durable resistance period for BPH. (d) Ratios of each resistance grade. (e) Ratios of each durable resistance grade.
