不同辣椒自交系抗疫病能力鉴定与植株功能性状关联分析OA

[Objective]The study aims to examine the correlation between phytophthora resistance of pepper and plant agronomic traits and to select and breed phytophthora resistance varieties of pepper.[Method]The irrigation method was employed to conduct a potted experiment on 45 different inbred lines of pepper.Agronomic traits as well as physiological and biochemical parameters were assessed.[Result]The results revealed significant variations in disease resistance among the inbred lines,and the incidence of eight inbred lines,including'RT19-248','RC17-555','YJ-24','NJ-07','702','298a','CF19',and'CF20',was less than 20％.Conversely,seven inbred lines,including'WangH242-1','XJ-19','NJ-08','CB3','CC4','CC7',and'CF9',exhibited an incidence rate exceeding 80％.The plant height,aboveground fresh weight,and nitrogen content exhibited significant differences after 20 days of inoculation compared to the control group.Correlation analysis revealed a negative correlation between disease inci-dence and plant height and fresh weight,while a positive correlation was observed with nitrogen content.[Conclusion]Eight inbred lines('RT19-248','RC17-555','YJ-24','NJ-07','702','298a','CF19',and'CF20')possess the potential to serve as parental sources for developing highly blight-resistant pepper va-rieties.Strong stalks,vigorous growth,and low nitrogen tolerance are the preliminary identification criteria of pepper varieties with high blight-resistance.