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Showing papers on "Plant disease resistance published in 1979"


Journal ArticleDOI
TL;DR: The classification for various characteristics of 397 F3 families of the IR30×N22 cross confirmed earlier results about the monogenic dominant control of resistance to brown planthopper, green leafhopper, and bacterial leaf blight, and about themonogenic recessive control of short stature.
Abstract: The inheritance of resistance to white-backed planthopper, Sogatella furcifera Horvath, was investigated in a rice, Oryza sativa L., cultivar N22. Resistance to the white-backed planthopper in the cross IR30×N22 appears to be governed by a single dominant gene-designated Wbph. The classification for various characteristics of 397 F3 families of the IR30×N22 cross confirmed earlier results about the monogenic dominant control of resistance to brown planthopper, green leafhopper, and bacterial leaf blight, and about the monogenic recessive control of short stature. Additionally, the genes governing plant height and resistance to white-backed planthopper, brown planthopper, green leafhopper, and bacterial leaf blight were found to segregate independently of each other in these 397 F3 families.

37 citations




Journal ArticleDOI
01 May 1979-Nature
TL;DR: Plant breeding for Pest and Disease Resistance, by G. E. Russell.
Abstract: Plant breeding for Pest and Disease Resistance. By G. E. Russell. Pp. 485. (Butterworths: London, 1978.) £25.

4 citations





Journal ArticleDOI
TL;DR: Twelve seed collections of tobaccos growing wild in the Okinawa district were evaluated for certain morphological characters and disease resistance; most of the collectibns were highly susceptible to bacterial wilt, but moderately or slightly resistant to black root rot and powdery mildew.
Abstract: Twelve seed collections of tobaccos growing wild in the Okinawa district were evaluated for certain morphological characters and disease resistance. CG, nsiderable variations in morphological features and disease reactions were noted among these collections. Plant height ranged from 95.3cm to 171.9cm, the number of leaves from 9.8 to 17.3 and leaf shape index from O.471 to O.764. There were two types in the shape of leaf-base, sessile and petioled, and three types in flower color, white, pink and white/pink variegation. Most of the collectibns were highly susceptible to bacterial wilt, but moderately or slightly resistant to black root rot and powdery mildew. There were large differences in their reactions to black shank; sorne of them were highly or moderately resistant and the others were highly susceptible. The collections which were rated resistant were considered to be useful as a source of black shank resistance.