Heterosis in TRADITOM tomato hybrids

This project evaluates heterosis and combining ability in tomato hybrids between modern inbreds and traditional cultivars, focusing on balancing yield, disease resistance, and sensory quality. Seven MERIDSEED inbreds (MS_1–MS_7) and eight traditional varieties (TRVA6030–TRVA6080) were crossed to generate UHM hybrids. Field trials assessed plant vigor, fruit productivity, and volatile composition via GC-MS. Strong combining ability was observed for fruit firmness and yield, particularly in MS_1 (Marmande) and MS_6 (Cherry/Cocktail). The RIN gene influenced ripening and volatile profiles, with 60% of hybrids showing reduced volatiles. Resistance to ToMV, TYLCV, and TSWV was confirmed in parental lines.