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A novel ecotype of Petunia integrifolia subsp. integrifolia var. depauperata with glabrous leaves was found near the town of Torres, Brazil, and hybridized with P. ×hybrida. In the F1 and F2 generations, the glabrous leaf trait was quantitatively inherited with high heritability. The absence of trichomes was not associated with the decrease in the resistance of the glabrous-leaved species and hybrids to aphids, but was correlated with a lower resistance to spider mites.
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HortScience