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Abstract
With 2 tables Abstract Nicotiana tabacum cv. ‘Polalta’ is reported as having a hypersensitive type of Tomato spotted wilt virus (TSWV) resistance. In ‘Polalta’ hybrids with susceptible cultivars, morphological deformations (thickened and ribbon‐shaped leaves, irregular venation, tumours) appear. Acceptable DH lines derived from hybrids of ‘Polalta’ with ‘Wiślica’ were obtained by a method of in vitro culture. Those DH lines were evaluated for TSWV resistance. Tests for resistance were conducted under greenhouse conditions using one TSWV isolate from a local source. The presence of the virus was verified using DAS‐ELISA. The DH lines PW‐833, PW‐834, and PW‐900 showed a near correct morphology and stably inherited dominant monogenic resistance to TSWV.
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