Table 7. Evaluation of plants from an interspecific cross between G. arboreum and G. hirsutum against cotton leaf curl virus disease under natural field conditions.
| Parentage | No. ofplantstested | Latentperiod(days) | No. of virusinfected plants | Diseaseindex(%) | Severityindex | InfectiontyperangeA | Diseasereaction# | |||||
| 40 DAS | 70 DAS | 40DAS | 70DAS | 40DAS | 70DAS | 40DAS | 70DAS | |||||
| BC1 | [2(G. arboreum)×G. hirsutum] | 19 | Symptomless | 19(180+11) | 19(190) | 1.3 | 0 | 0.05 | 0 | 0 | 0 | R |
| (G. hirsutum×G. arboreum) | 15 | 35–40 | 15(140+11) | 15(150) | 1.6 | 0 | 0.06 | 0 | 0–1 | 0 | R | |
| CIM-496 (Std.) | 31 | 14 | 31(12+53+254) | 31(43+274) | 94.35 | 96.7E* | 3.7 | 3.9 | 2–4E | 3–4E | HS | |
| BC2 | [2(G. arboreum)×G. hirsutum] | 14 | 30–35 | 14(130+11) | 14(120+21) | 1.8 | 3.5 | 0.07 | 0.1 | 0–1 | 0–1 | HT |
| G. hirsutum×G. arboreum | 161 | 25–30 | 161(1460+71+52+33) | 161(1380+91+82+53+14) | 4 | 6.8 | 0.17 | 0.2 | 0–3 | 0–4 | HT | |
| CIM-496 (Std.) | 168 | 13 | 168(42+73+1574E) | 168(42+113+1534E) | 97.7 | 97.1 | 3.9 | 3.9 | 2–4E | 2–4E | HS | |
| BC3 | [2(G. arboreum)×G. hirsutum] | 12 | 25–30 | 12(110+12) | 12(90+21+12) | 4.2 | 8.3 | 0.17 | 0.3 | 0–2 | 0–2 | HT |
| G. hirsutum×G. arboreum | 225 | 25–30 | 225(2000+51+82+63+64) | 225(1760+141+122+113+94) | 7 | 12 | 0.28 | 0.5 | 0–4 | 0–4 | HT | |
| CIM-496 (Std.) | 190 | 15 | 190(42+63+1804E) | 190(62+153+1694E) | 95 | 96.4 | 3.8 | 3.8 | 2–4E | 2–4E | HS | |
A
Infection type range is based on the 0–4 scale described in Table 1;
*Enation where observed; R Resistant; HT Highly tolerant; HS Highly susceptible;
#
Disease reaction based on disease index 70 DAS.