S U M M A R YTannin-containing and tannin-free members of two pairs of near-isogenic lines of Vicia faba were studied in glasshouse experiments at Plant Breeding International Cambridge in 1989 to determine the cause of poor establishment of tannin-free lines in the field. Tests in field soils demonstrated marked differences in disease severity and growth, the tannin-containing lines being the more resistant to Fusarium culmorum and F. solani, the principal pathogens isolated. Susceptibility was not attributable to testa damage in tannin-free lines. In further tests on a range of varieties, some tanninfree and low-tannin, coloured-flowered varieties were as resistant as standard high-tannin lines. The results indicate that it should be possible to select for resistance to seedling infection and to subsequent poor establishment among tannin-free lines and varieties.
RESUMENLa familia Euphorbiaceae como fuente de aceites vegetales para la industria tecnoquimica.La familia Euphorbiaceae contiene gran número de especies de las que se pueden obtener productos de interés económico como el caucho, la tapioca, ceras y aceites.En este trabajo se estudian en primer lugar las características botánicas y químicas de la familia y las peculiaridades de los aceites de sus semillas y se comparan con los de otras familias. En segundo lugar, se revisan otros compuestos químicos así como especies de interés económico utilizadas en alimentación, medicina o industria, incluyendo géneros con potencial interés y los actuales cultivos oleaginosos industriales como Ridnus, Euphorbia, Aleurites, Sapium, Jatropha, etc.Finalmente, desde un punto de vista de mercado, se apuntan las perspectivas de estos aceites como materias primas para la industria química.
Melampsora euphorbiae (Schub.) Castagne is reported for the first time on Euphorbia lagascae, a spurge which is a native of south‐east Spain and has seed oil rich in vernolic acid. In Spanish trials, rust caused by M. euphorbiae was the major disease of this potential crop.
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