Effect of the Nicotiana debneyi black root rot resistance gene on the yield and quality characteristics of flue-cured tobacco in Ontario

Abstract

. 2003. Effect of the Nicotiana debneyi black root rot resistance gene on the yield and quality characteristics of flue-cured tobacco in Ontario. Can. J. Plant Sci. 83: 939-942. The effects of Nicotiana debneyi-derived resistance to black root rot disease were evaluated for yield, agronomic and quality traits by comparing the near isogenic cultivars AC Gayed (resistant) and Delgold (susceptible). Over 7 yr of trials the possession of resistance led to yields and economic returns that averaged 6 and 7% lower, respectively, than for the susceptible line. Les auteurs ont évalué les effets de la résistance de Nicotiana debneyi au pourridié noir sur le rendement, les paramètres agronomiques et la qualité du tabac en comparant les cultivars presque isogéniques AC Gayed (résistant) et Delgold (sensible). Au cours des sept années qu'ont duré les essais, les gènes de résistance ont entraîné une baisse moyenne du rendement et des recettes respectivement de 6 et de 7 % comparativement à la variété sensible.

<i>Agrobacterium tumefaciens</i>-Mediated Transformation of Wild Tobacco Species <i>Nicotiana debneyi</i>, <i>Nicotiana clevelandii</i>, and <i>Nicotiana glutinosa</i>

“…debneyi (2n = 4x = 48) is a desirable material to study hybridity and N. debneyi-derived resistance to black root rot disease in Nicotiana species [8]- [10]. N. clevelandii (2n = 4x = 48) is susceptible to a large number of plant viruses and N. glutinosa (2n = 2x = 24) shows resistance to a broad range of tombusviruses [11], both species are desirable wild germplasm for studying genetic control of tobmusviruses.…”

Characterization and Genetic Mapping of Black Root Rot Resistance in Gossypium arboreum L.

“…However, in the susceptible YZ roots, fungal hyphae were often detected within the stele, and in the xylem vessels (e.g., Figure 4 b). The infection process and single-locus nature of BM13H resistance resembles the single-gene resistance in tobacco identified from Nicotiana deneyi Domin [ 27 ] called resistance to BRR 1 (RBRR1), that was transferred to burley tobacco production in the 1950s and has remained a durable source of BRR resistance ever since [ 28 ]. Hood and Shew [ 22 ] compared BRR infection in a BRR-resistant tobacco cultivar ‘Tennessee 90′ (TN90) containing RBRR1, to a susceptible tobacco cultivar ‘Burley 21 x Kentucky 10′ (B2IxI0).…”