The genetic control of resistance to Ralstonia solanacearum in resistant tomato genotypes is determined by different genes

The tomato crop is one of the most studied vegetables in the world, especially in the area of plant breeding. Therefore, new studies on this plant are needed to develop new cultivars. One of these needs is resistance to soil-borne diseases such as bacterial wilt caused by Ralstonia solanacearum, which causes major economic losses. One of the first steps in obtaining new cultivars is to determine the genetic control of their characteristics. Therefore, the aim of this study was to determine whether the R. solanacearum resistance loci of two resistant tomato genotypes (Havaii 7996 and Yohimatsu) are the same or not, based on an inheritance study. To this end, F1, F2, BC11 and BC21 generations were evaluated in one experiment, and 60 F2:3 progenies were evaluated in a second experiment. In both experiments, the genitors Yoshimatsu and Hawaii 7996 were used as a control. A descriptive rating scale was used to evaluate all the treatments. The main result was that the genetic control of resistance to R. solanacearum in the two resistant tomato genotypes is determined by different genes, with two recessive genes found in Yoshimatsu and one in Hawaii 7996.