Table 2.

Disease evaluation design and the number of plants to parents and their progenies based on disease severity index in 20 dai against R. solanacearum SL1931 strain.

Population a	No. of Plants	Disease Severity Index					Mean of DSI b	Wilt Rate (%) c	AUDPC d
		0	1	2	3	4
MC4	30	6	24	0	0	0	0.8	0	7.5
Subicho	30	0	0	0	0	30	4.0	100	50.3
F1	30	0	12	4	0	14	2.5	46.7	22.7
F2	90	0	44	11	1	34	2.3	38.8	21.9

^a ‘MC4′ and ‘Subicho’ is resistance (R) and susceptible (S) parent line, respectively. The F₁ population crossed ‘Subicho’ (S) x ‘MC4′ (R) and F₂ population derived from self-cross of F₁ plants. ^b The disease severity index (DSI) was calculated at 15 days after inoculation based on a 0 to 4 rating scale. ^c Wilting was defined as DSI at 20 dai of ≥ 3. ^d The area under the disease progress curve (AUDPC) was calculated from scores (0–4) evaluated at 0, 7, 10, 15, and 20 dai.