Resumo

PEREZ LEON, Noraida de J; GONZALEZ CEPERO, María C; CASTRO MENDUINA, Rodolfo I  e  AGUILAR PORTERO, Manuel. Evaluating rice cultivars in different rice-producing areas from “Los Palacios”, Pinar del Río, to be used in breeding programs. cultrop [online]. 2016, vol.37, n.1, pp. 116-123. ISSN 1819-4087.

Rice blast is considered the most devastating disease worldwide; since it is widely distributed, it affects the aerial parts of rice plants, reducing agricultural yields significantly, besides constituting a serious constraint to production. Knowing this antecedent, this work was developed for two years, with the aim of selecting resistant rice cultivars against Magnaporthe grisea Barr (Pyricularia grisea Sacc) with good agronomic performance, to be further used as progenitors in rice breeding programs. Results showed a significant interaction among genotype, location and year of cultivars against blast and yield. The usefulness of Biplot analysis was confirmed for selecting stable cultivars according to their proximity to the origin of coordinates, as well as those responsible for the significant genotype-environment interaction. Four cultivars were classified as more stable to rice blast resistance: ‘2077’, ‘IR 759-54-2-2’, ‘Tetep’ and ‘Moroberekan’, and six cultivars for agricultural yield: ‘Amistad’82’, ‘INCA LP-1’, ‘INCA LP-6’, ‘6066’, ‘CP₁C₈’ and ‘IR 1529-430’, characteristics that let them be used as progenitors for crosses in rice breeding programs of Cuba

Palavras-chave : Magnaporthe grisea; breeding; Oryza sativa; Blast diseas.

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