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Published in Crop Sci 19:455-457 (1979)
© 1979 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Effects of the N Mosaic-Resistance Factor on Agronomic and Chemical Traits in Burley Tobacco1

Paul D. Legg, G. B. Collins and C. C. Litton2

Isogenic or near-isogenic lines in eight cultivar backgrounds of burley tobacco (Nicotiana tabacum L.) were developed with the N. glutinosa L. factor for mosaic resistance. For each cultivar background, a resistant and a susceptible selection from the seventh backcross generation pins the recurrent parental cultivar were evaluated for several agronomic and chemical traits. Effects of the resistance factor or associated genetic material on characteristics other than response to the mosaic virus were not consistent over genotypes. The results, plns information from other studies, indicated that the genetic constitution of a recipient line influences the effects of the resistance factor.

Key Words: Virus disease • Nicotiana tabacum L. • Isogenic lines

1 Contribution from the USDA, SEA, AR and the Univ. of Kentucky Agric. Exp. Stn. Published with the approval of the Director of the Kentucky Agric. Exp. Stn. as Paper No. 78-3-166.

2 Research geneticist, USDA, SEA, AR; professor of agronomy, Univ. of Kentucky; and research agronomist, USDA, SEA, AR, respectively.

Received for publication December 1, 1978.




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