Inheritance of resistance to anthracnose caused by Colletotrichum capsici in Capsicum

Abstract

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 .

Resistance in Capsicum spp. to anthracnose affected by different stages of fruit development during pre- and post-harvest

“…Kanchana-Udomkan et al (2004) found that fruit size does not affect the development of the disease, and unripe fruit of C. chinense were more susceptible to anthracnose caused by C. gloeosporioides than ripe fruit. Pakdeevaraporn et al (2005) and Mahasuk et al (2009a) showed that different genes control resistance to anthracnose in unripe and ripe fruit, which is extremely significant for Capsicum breeding seeking resistance to anthracnose. Mongkolporn et al (2010) also observed different reactions caused by the stage of development of Capsicum spp.…”

“…For resistance to C. gloeosporioides, inheritance was described as overdominant or partially dominant (Park et al, 1990a). The presence of a recessive gene controlling anthracnose resistance has also been described in Capsicum chinense (Pakdeevaraporn et al, 2005). Voorrips et al (2004) used quantitative trait loci (QTL) mapping and identified a highly significant main QTL with major effect on three evaluated traits (frequency of infection, lesion true diameter and overall diameter of lesion) after the inoculation of C. gloeosporioides in plants from crosses between Capsicum annuum and C. chinense.…”

“…Several breeding programs have been developed aimed at identifying and incorporating resistance genes in cultivars of sweet and chili pepper (Pakdeevaraporn et al, 2005;Yoon & Park 2005;Kim et al, 2008;Pereira et al, 2011). Sources of resistance have been identified in pepper accessions, including accession PBC932 in Capsicum chinense, resistant to Colletotrichum capsici, and Capsicum baccatum resistant to Colletotrichum gloeosporioides (Babu et al, 2011).…”

Research Article Multiple genetic resistances in Capsicum spp.

“…The Asian Vegetable Research Development Center (AVRDC) identified, in 1997 and in 1999, the main sources of anthracnose resistance in Capsicum plants for C. baccatum and C. chinense (Pakdeevaraporn et al, 2005). Since then, several researchers have used these genotypes in Capsicum breeding programs for resistance to anthracnose.…”

Identification and Evaluation of Potential Trichoderma Strains against Colletotrichum capsici and Fusarium oxysporum f. sp. capsici Causing Anthracnose and Wilt Disease in Chilli

“…yield loss (Pakdeevaraporn et al, 2005). Typical anthracnose symptoms on chilli fruit include sunken necrotic tissues, with concentric rings of acervuli.…”