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Ciência e Agrotecnologia

versão impressa ISSN 1413-7054

Resumo

SERA, Gustavo Hiroshi et al. Pseudomonas syringae pv. garcae and some agronomic traits association in F2 coffee plants segregating to the erecta gene. Ciênc. agrotec. [online]. 2004, vol.28, n.5, pp.974-976. ISSN 1413-7054.  https://doi.org/10.1590/S1413-70542004000500002.

Bacteriosis caused by Pseudomonas syringae pv garcae causes significant damage in important brazilian coffee regions, mainly affecting young and pruned coffee plants and plants exposed to the wind. The objective of this research was to establish the association between vegetative vigor and types of plagiotropic branches in the intensity bacteriosis ocurrence. A total of 316 F2 plants growed at Londrina's IAPAR Experimental Station in october 1998 were evaluated in october 2001. The intensity of bacteriosis ocurrence was evaluated by using a scale varying from 1 to 5, where 1 = without lesion and 5 = plants with many lesions. For the evaluation of the vegetative vigor, scores from 1 to 5, where 1 = less vigorous plants and 5 = more vigorous plants were attributed. For the types of plagiotropic branches, scores from 1 to 3, where 1 = normal, 2 = semi-erect and 3 = erect were attributed. The Pearson correlation coefficient was estimated to evaluate the relationship between the traits vegetative vigor and type of plagiotropic branches with intensity of bacteriosis ocurrence. The correlation estimate between the bacteriosis intensity and vegetative vigor was not significative. The estimated correlation between the bacteriosis intensity and plant architecture was r = + 0,2087** evidencing that more erect plants are more susceptible to bacteriosis than normal branch plants.

Palavras-chave : Coffee crop; breeding; cultivars; bacteriosis; Coffea arabica.

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