Comparison of inheritance of resistance to tomato anthracnose caused by two Colletotrichum spp
1984
Miller, A.N. | Ng, T.J. | Barksdale, T.H.
Inheritance of resistance to C. coccodes and C. dematium was compared using a 6-parent diallel in 1982. The parents, one set of F1 hybrids and 5 reciprocal crosses were grown at Beltsville and harvested fruits were inoculated hypodermically with spore suspensions of each spp. Reciprocal effects were not present in either set of inoculations of the 2 pathogens for the 5 crosses studied. Mean squares for general combining ability accounted for most of the genetic variability in both sets of inoculations. Mean squares for specific combining ability were only significant for C. dematium inoculations. According to the analysis of variance and covariance of the parental arrays, partial dominance appeared to be in the direction of susceptibility. Narrow-sense heritabilities were 78% for C. coccodes and 64% for C. dematium. The correlation coefficient between inoculations with C. coccodes and C. dematium was 0.87.
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