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Fresh bean (Phaseolus vulgaris L.) is an important legume crop in Turkey used as a major source of protein in the human diet. The total fresh bean production of Turkey is estimated at 651,094 tons. Bean production shows a decreasing factor due to various abiotic and biotic factors in Turkey. Among the viruses that infect beans, Bean common mosaic virus (BCMV) and Bean common mosaic necrosis virus (BCMNV) are the most widespread destructive agents. The main objective of this study was to carry out a diagnostic survey for Bean common mosaic disease (BCMD) in beans, characterize its causal agent, and evaluate host resistance to BCMV and BCMNV. In addition to this, genotypes were tested for the levels of genetic diversity by 58 SSR markers. A total of 123 alleles with a PIC value of ≥0.2 were obtained from 75 bean genotypes. The unweighted NJ dendrogram was created using the scoring data, which demonstrated the molecular genetic relationships among the bean genotypes. SCAR (Sequence Characterized Amplified Region) markers were used to determine the resistant genotypes to BCMV and BCMNV. According to the result, 21 out of 75 genotypes have resistance alleles to both pathogens.

Tomato spotted wilt virus (TSWV) is a viral disease agent that limits pepper production and causes economic losses in the world. The gene controlling resistance to TSWV (Tsw) has been detected in many Capsicum chinense pepper genotypes ('PI 152225', 'PI 159236', 'CNPH 275''C00943', and '7204') and mapped on chromosome 10 it has been mapped to cultivars (Capsicum annum). Although the homolog of Sw-5 could not be mapped, phenotypically similar genes are present in tomatoes, with many Sw5 homologs found in similar regions in tomatoes and pepper. The relationship between Tsw and Sw5 has been studied through genetic studies of TSWV. The most effective and environmentally friendly way to combat this viral pathogen is to use resistant varieties. Our study investigated the resistance levels of 40 genotypes at S3 stage against tomato spotted wilt virus (TSWV) investigated. SCAR marker was used in molecular studies. Genotypes were determined as 5 homozygous resistant (RR), 15 sensitive (rr), and 20 heterozygous resistants (Rr).