3.9 Article

Morphological characterization of red rice (Oryza sativa) ecotypes derived from irrigated rice areas

Journal

PLANTA DANINHA
Volume 26, Issue 2, Pages 249-260

Publisher

UNIV FEDERAL VICOSA
DOI: 10.1590/S0100-83582008000200001

Keywords

red rice; growth; interference

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Aspects related to the phenotypical characterization of red rice ecotypes collected in the states of Rio Grande do Sul and Santa Catarina were studied and compared to those of commercial rice cultivars BR-IRGA 409, BR-IRGA 410, IRGA 417, and El Paso L 144. The sixteen red rice ecotypes plus four rice cultivars were sown with five replications in plastic pails filled with 9 liters of soil. The genotypes were described according to the traits proposed by the International Rice Research Institute (IRRI, 1980). The following plant and seed parameters were evaluated: leaf color and hairiness, effective tillering, biological day-degrees to complete the flowering period, seed shattering, number of fertile tillers, flag leaf area, plant height, number of seeds per particle and seed production. The results showed a great morphological variability among the red rice ecotypes.

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