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Combining ability estimates for early blight resistance in tomato

Journal of the American Society for Horticultural Science 114(1): 118-121
Combining ability estimates for early blight resistance in tomato
Six inbred tomato (Lycopersicon esculentum Mill.) genotypes and 12 hybrids among them were evaluated at two locations for resistance to early blight (Alternaria solani). The breeding lines 71B2, C1943, and NC EBR-1 were the most resitant, while 'Castlejay' was consistenly the most susceptible. Hybrid means for area under the disease progress curve (AUDPC) generally were intermediate to their parental values, indicating quatitative genetic control. Five of the parents were included in a diallel matting design to obtain estimates of general combining ability (GCA) and specific combining ability (SGA) for the resistance trait. both GCA and SCA were highly significant; the GCA component accounted for 88.2% of the genotypic variation.

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Accession: 001780007

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