Estimasi aksi dan jumlah gen dalam ketahanan tanaman tomat terhadap CMV=Estimation of Action and Number of The Gene in Resistance on Tomato to CMV

One method of controlling CMV infection on tomato was using on cultivar resistant. However, existence of cultivar resistant was not available yet in the field, until breeding program for resistance on tomato to CMV was needed to solve the problem. To determine well strategy, mode of inheritance resistance to CMV on tomato was suggested for studying it before, especially in action and number of the gene controlling resistance. Two accessions (LV-4491 and LV-2257) were crossed each other to get generations of F,, F]R, BCn, BCn, and Fr Then all of breeding material were inoculated by CMV-2 and observed on disease index and titer virus. Result of research showed that gene for resistance was controlled by 2 recessive major genes. There was effected by recessive duplicate epistasis in the disease index, that expressed by genetic components of additive [a], dominance [d], and interaction dominance-dominance [ddj. In the titer virus there was effected by semi epistasis of genetic components of additive [a] and dominance [d]. Keywords: Lycopersicon esculentum �CMV �gene �resistant -susceptibl