Author(s): Manoj BP, Krishna Prakash, Zakir Hussain, Pasupula Karishma, Chandana S, Sai Timmarao, Mahebub Shaik and Varsha V

Abstract: Tomato (Solanum lycopersicum L.) is a crucial crop globally, revered for its nutritional value and adaptability. However, it faces significant challenges posed by the Tomato Leaf Curl Virus (ToLCV) and bacterial wilt induced by Ralstonia solanacearum. This research aimed to meticulously evaluate various tomato genotypes for their resistance to these debilitating diseases while identifying hybrid combinations with promising traits. Key findings include the identification of highly resistant hybrids such as DT1504 x DT911 against ToLCV and Ralstonia solanacearum. Assessment based on disease severity indices revealed, DT1504 and Pusa Ruby consistently exhibiting heightened vulnerability. However, genotypes like DT1504, DT911 and DT806 demonstrated commendable levels of resistance in contrast to the susceptibility observed in Pusa Ruby, Pusa Rohini, DT816 and DT806. Using line× tester analysis, the GCA and SCA hybrid combinations such as DT1504 x DT911 and Pusa Rohini x DT806 demonstrated notably negative SCA values indicating strong genetic interactions contributing to disease resistance. This study highlights the vital role of genetic diversity in breeding, emphasizing hybrids dual benefits of high yield and disease resistance. Through identifying and utilizing genetic resistance it aims to mitigate tomato diseases promoting sustainable agriculture worldwide.

DOI: 10.33545/26174693.2024.v8.i4e.956