Inheritance of resistance to anthracnose caused by Colletotrichum capsici in Capsicum P . P a kd eeva ra po rn 1 , S. W asee 2 , P . W . J . T ay lo r 3 and O . M on gk ol po rn 4 , 5 AbstractInheritance of resistance to anthracnose caused by Colletotrichum capsici (Syd.) Butler & Bisby was studied in interspecific Capsicum populations derived from a cross between a Thai elite cultivar Capsicum annuum L. ÔBangchangÕ and a resistant line C. chinense Jacq. ÔPBC932Õ. The resistance was assessed by measuring lesion area per fruit area (LFA) on detached chili fruits, using a laboratory-based injection inoculation. Nil symptoms resembling the resistant parent ÔPBC932Õ were also identified in the progeny F 2 and BC 1 populations. Segregation of resistance (nil LFA) and susceptibility in the F 2 fitted a 1 : 3 Mendelian ratio, indicating that resistance was responsible by a single recessive gene. The segregation of the trait in the testcrosses in both BC 1 s also confirmed the 1 : 3 gene segregating model as found in the F 2 .

No abstract