ABSTRACT Liberica coffee (Coffea liberica W. Bull Ex. Hiern) is one of the plants that have been developed in peatlands area such as Riau. One of factors that reduce the productivity of coffee plants is pests and plant diseases. Liberica coffee varieties Liberoid Meranti 1 (Lim 1) and Liberoid Meranti 2 (Lim 2) are from Kepulauan Meranti and resistant to leaf rust disease. LRR-RLK sequence in …