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Evaluation of chili (Capsicum annuum L.) progressive lines for resistance against Colletotrichum capsici and Colletotrichum gloeosporioides
Author(s)
Date Issued
September 1, 2024
Type
Conference Paper
Abstract
Anthracnose (Colletotrichum spp.) is a devastating disease that affects the production of chili all over the world. Colletotrichum spp. with strong pathogenicity include C. capsici and C. gloeosporioides, which can infect both immature and mature pepper fruit and cause significant economic losses for the chili industry. The objective of this study was to evaluate the progressive lines of chili for resistance to anthracnose disease. The experiments were carried out by a completely random design (CRD) with three replications and five fruits per replication. In this experiment, 30 progressive lines of chili with different resistant genetic sources (PBC932 and PBC80) and one susceptible cultivar were inoculated with C. capsici and C. gloeosporioides into the two chili fruit stages (green and ripe mature) by microinjection technique. The disease severity was evaluated by lesion diameter seven days after inoculation. Based on their resistance level to two Colletotrichum species at the two fruit stages, the result showed that all progressive lines were classified into eight groups. Five progressive lines, i.e., AT1-1, AT2-3, AT3-1, AT5-2, and AT6-1, were highly resistant (HR) to two Colletotrichum species at both mature fruit stages. Therefore, five progressive lines should be used as high potential lines for improving new varieties with high resistance to anthracnose disease.
Citation
Acta Horticulturae, 3(1404), 983-988, 2024