Mongkolporn Orarat, Montri Paweena, Supakaew Thunyawan, Taylor Paul W J
Department of Horticulture and Center for Agricultural Biotechnology, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140 Thailand/Center for Agricultural Biotechnology (AG-BIO/PERDO-CHE).
Center for Agricultural Biotechnology, Kasetsart University/Center for Agricultural Biotechnology (AG-BIO/PERDO-CHE).
Plant Dis. 2010 Mar;94(3):306-310. doi: 10.1094/PDIS-94-3-0306.
Differential reactions on mature green and ripe chili fruit of 10 genotypes from four cultivated Capsicum spp. (i.e., Capsicum annuum, C. baccatum, C. chinense, and C. frutescens) were investigated after being inoculated with 33 isolates of Colletotrichum capsici, C. gloeosporioides, and C. acutatum originating from Thailand. The inoculation was performed using an injection method. Differential reactions, based on qualitative host reactions (i.e., lesion development versus no infection) grouped the Colletotrichum isolates into different pathotypes. C. capsici was grouped into three pathotypes based on differential reactions on ripe fruit stage of two Capsicum chinense genotypes (PBC932 and C04714) and two pathotypes based on differential reactions on mature green fruit stage of C04714. Colletotrichum gloeosporioides was grouped into five and six pathotypes on their reactions in ripe and green fruit maturity stages, respectively. C04714 and two Capsicum annuum genotypes (Jinda and Bangchang) acted as differential hosts with ripe fruit, whereas C04714 with all C. annuum and C. frutescens genotypes acted as differential hosts with green fruit. No pathotype of Colletotrichum acutatum was identified on ripe fruit but three pathotypes were identified on green fruit based on differential reactions in two Capsicum baccatum genotypes (PBC80 and PBC81).
对接种源自泰国的33株辣椒炭疽病菌（Colletotrichum capsici）、胶孢炭疽病菌（C. gloeosporioides）和尖孢炭疽病菌（C. acutatum）后，对4种栽培辣椒属物种（即辣椒（Capsicum annuum）、黄灯笼辣椒（C. baccatum）、中国辣椒（C. chinense）和小米辣（C. frutescens））的10个基因型的成熟绿色和成熟辣椒果实的差异反应进行了研究。接种采用注射法。基于定性宿主反应（即病斑发展与未感染）的差异反应将炭疽病菌分离株分为不同的致病型。根据对两种中国辣椒基因型（PBC932和C04714）成熟果实阶段的差异反应，辣椒炭疽病菌被分为三个致病型；根据对C04714成熟绿色果实阶段的差异反应，分为两个致病型。胶孢炭疽病菌在成熟和绿色果实成熟阶段的反应分别被分为五个和六个致病型。C04714和两种辣椒基因型（金达和邦昌）在成熟果实上作为鉴别寄主，而C04714与所有辣椒和小米辣基因型在绿色果实上作为鉴别寄主。在成熟果实上未鉴定出尖孢炭疽病菌的致病型，但根据两种黄灯笼辣椒基因型（PBC80和PBC81）的差异反应，在绿色果实上鉴定出三个致病型。
