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

Abstract

The tomato crop is one of the most studied fruit vegetables when it comes to genetics and breeding, with the aim of developing future cultivars that meet the needs of farmers and the consumer market. 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 Ralstonia solanacearum resistance loci of two resistant tomato genotypes 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 Ralstonia solanacearum in the two resistant tomato genotypes is determined by different genes. Two recessive genes were found in Yoshimatsu and one in Hawaii 7996.