Estimation Of Number And Genes Actions Of Cpmmv (Cowpea Mild Mottle Virus) Disease Resistance Genes On Soybean Crop

Abstract

Soybean is one of the important crop in Indonesia. The study aimed to identify the number and the roles of CPMMV (Cowpea Mild Mottle Virus) disease resistance genes on soybean crop genes and its inheritance traits. The Gumitir and Argopuro soybean varieties were used as susceptible female parents (P1). The MLG 0120 and MLG 0278 genotypes were used as resistant male parents (P2). The F 1 ,F 1.r , F 2 , BC 1.1 , BC 1. 2 was examined for genes number and its actions. The study applied Randomized Complete Block Design with three replications. Seeds were produced from the cross of resistant and susceptible parents (F 1), mating between F 1 (F 2), and Backcross (BC 1.1 , BC 1. 2 .), and male-female parents (P 1 and P 2) which were mechanically inoculated by CPMMV isolate. The result confirmed that the resistance properties of soybean derived from the cross series of Gumitir x MLG 0120 and Argopuro x MLG 0120 were controlled by two duplicate recessive epistatic genes and its inheritance was additive. In cross series of Argopuro x MLG 0278 and Gumitir x MLG 0278, however, the resistance was controlled by two duplicate dominant epistatic genes and its inheritance was additive.