Abstract
Solanum tuberosum L. Gp. Tuberosum populations recurrently selected for resistance to potato leafhopper (PLH),Empoasca fabae (Harris), were crossed with ten PLH susceptible Gp. Tuberosum breeding clones and cultivars to test for genetic transmission of resistance on a population basis. When measured against the unselected population, seven generations of recurrent selection reduced nymphal infestation levels by 68% and hopperburn severity by 39%. Comparing progeny populations from ‘unselected population’ X ‘susceptible clones’ with ‘generation 7 population’ X ‘susceptible clones’ the nymphal infestation level was 35% lower and hopperburn severity 14% less in the latter cross. Therefore, roughly half the gain in nymphal resistance and about one third the gain in hopperburn resistance were transmitted to the progeny populations.
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