Effects of Genotype and Irrigation System on Multi-Disease Resistance, Fruit Yield, Capsaicin Content and Shelf-Life of Chili Pepper (Capsicum annuum L.)

摘要

A study was conducted at AVRDC-The World Vegetable Center, Tainan, Taiwan, to evaluate yield and quality of different chili pepper genotypes grown under drip and furrow irrigation systems, identify multi-disease resistant genotypes; and compare the shelf-life of the fruits at different storage temperatures. The experiments were laid-out in a split plot arranged in a randomized complete block design with irrigation system as the main plot and the chili pepper cultivars/hybrids as the sub-plot. Based on a total of six harvests, drip irrigated plants produced greater number and heavier fruits which resulted in 10% higher fruit yield compared to furrow irrigated plants. Drip irrigated plants were also less infected with powdery mildew. Among the genotypes, 'CCA321', an AVRDC bred, out-yielded the Indonesian cultivars by as much as 43% but was the most susceptible to powdery mildew. Among Indonesian cultivars, 'Jatilaba' was the highest yielder and 'KR-Bogor' was the most susceptible to powdery mildew.'Laris' F_1 hybrid displayed the least infection by powdery mildew. AII genotypes were resistant to phytopthora, Gemini virus, and anthracnose. Capsaicin content was found to be higher in drip irrigated plants by about 12% more than that in furrow irrigated plants. 'CCA321' gave higher capsaicin content than other genotypes. In terms of shelf-life, both irrigation systems gave comparable results. Among genotypes, 'CCA321' had the longest shelf-life of 10 days at ambient while 'Jatilaba' had the longestshelf life of 40 days at 4-6°C.