Resumo

PEREZ LEON, Noraida de J.; DIAZ LOPEZ, Guillermo; RODRIGUEZ DIAZ, Lienys Melkis  e  HERNANDEZ PEREZ, Teresa. Evaluation of rice cultivars (Oryza sativa L.) from Vietnam, for their introduction in Cuba. Rev. colomb. biotecnol [online]. 2023, vol.25, n.1, pp.15-25.  Epub 06-Dez-2023. ISSN 0123-3475.  https://doi.org/10.15446/rev.colomb.biote.v25n1.107284.

With the objective of evaluating the phenotypic diversity of eight rice cultivars (Oryza sativa L.) from Vietnam, for their introduction in breeding programs and production in Cuba, supported by morphoagronomic characters and multivariate analysis techniques, this work was developed in Scientific and Technological Base Unit belonging to the National Agricultural Sciences Institute of Cuba. The Vietnamese cultivars were planted in the field together with the commercial cultivars INCA LP-5 and INCA LP-7, to be characterized agronomically with the use of 29 qualitative and 22 quantitative descriptors. The results showed that 16 qualitative characters were homogeneous for the eight cultivars from Vietnam and the two Cuban commercial cultivars, the association between various quantitative characters reaffirms the influence exerted by some components on yield, which are considered as markers for selection. Three cultivars of Vietnamese origin (GL301, LCG3-4 and DS1) cannot be used in Cuban rice production, due to their susceptibility to Tagosodes. All cultivars showed resistance to Rhizoctonia solani and Sarocladium oryzae and two (GL 301 and LTH 31) were susceptible to Pyricularia grisea. The OM6976, OM5451 and OM8087 cultivars reached high yield values, so they could be used as parents in breeding programs, as well as commercial cultivars.

Palavras-chave : plant breeding; genetic variability; morph agronomic characters; descriptors; morphology; yield.

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