七个咖啡品系F1代无性系田间抗锈病性评价OA

To screen for rust-resistant Coffea arabica varieties suitable for planting in the Pu'er region,a field natural infection assessment was conducted.During the peak incidence period of coffee leaf rust,from October 2023 to January 2024,the dominant variety T8667 was used as the control,and the disease incidence and disease index of seven lines(GPFA107,GPFA117,GPFA118,GPFA120,GPFA121,CCCA 10×25,CCCA 12×25)were investigated at four experimental sites in Pu'er:Simao District,Ning'er County,Menglian County,and Jiangcheng County.The results showed significant differences in both disease incidence and disease index among different sites and lines.The disease incidence and disease index were higher at the Kangping,Nandaohe,and Ning'er sites,while lower at the Mengma site.At the same site,significant differences were also observed among different lines.Except at the Mengma site,lines CCCA 10×25,CCCA 12×25,and T8667 exhibited severe rust infection at all other sites.Lines GPFA117,GPFA118,and GPFA120 showed low infection levels at all sites.Therefore,it is considered that lines GPFA117,GPFA118,and GPFA120 are considered suitable for planting in the Pu'er region.These results can provide a reference for the adaptive planting of new rust-resistant coffee varieties in Yunnan.