Resumen

BUSTAMANTE, José; ROA, Sara; CASANOVA, Anabel  y  ROSO, Luis. Líneas de café resistentes a la roya en una localidad del Estado Táchira, Venezuela. Agronomía Trop. [online]. 2004, vol.54, n.1, pp.75-91. ISSN 0002-192X.

Coffee rust, Hemileia vastatrix Berk and Br., is the main production limiting disease of coffee in Venezuela. To obtain genetic material resistant or tolerant to this disease, of high production and short plants, 20 lines of Catimors, Cavimors, Sarchimors and others from Ethiopian germplasm were evaluated in one location of Tachira. During the second year after planting, a record of plant height and basal stem diameter was carried out. The production of berry beans per plant was recorded for the first four commercial harvesting, and a sample of each was processed using water to estimate the production of green coffee. Precocity of fruit ripening, blasted grain percentage, and seed size were recorded too. The latter was expressed as percentage of coffee greater than 17/64 inches of diameter or premium coffe. For all the yield variables (berry beans per plant, green coffee per ha, seed size, precocity, and percentage of blasted grain) there was a highly significant effect for the genotypes and years but no significant effect for their interaction. All the screened coffee lines yielded more than the Catuaí variety used as control. Some lines yielded a high production, had a low percentage of blasted grains, and had a good seed size. The line of Sarchimor MC-06 origin was the best with a yield superior to the control in 53%, and a percentage of 82,65 of premium coffee.

Palabras clave : Coffee arabica L.; genetic improvement; varieties; production; Hemileia vastatrix Berk and Br..