Calidad molinera de 40 líneas avanzadas f6 de arroz (Oryza sp.) cultivadas en dos zonas arroceras del Ecuador

Abstract

The milling properties of 40 advanced lines (F6 seeds) of rice, derived from interspecific crosses between Oryza rufipogon G. x Oryza sativa L. ssp. japonica to promote its use at a commercial level, were compared with the commercial control varieties. The samples came from two experimental sites: from the CEDEGE project area of ​​ Babahoyo canton, Los Ríos province (locality 1) and from Santa Lucía canton, Guayas province (locality 2). The variables of Humidity (%), Paddy Rice (g), Impurities (g), Clean Grains (g), Husk rice (g), Integral Rice (g), White Mass (g), Powder rice (g), Broken grain (g) and Flower Rice (g) were evaluated. Based on the results of the variance analysis performed with the variables evaluated in this study, none expressed statistical significance between the lines and between localities. The result of the Tukey test (p> 0.05), showed that there was no difference between the cultivars analyzed, and also when the t test was performed for the flower rice parameter, the values did not present statistical difference between the localities (0.075 NS). It is interpreted that, from statistical results, that the advanced F6 lines of rice that have been obtained so far, are statistically equal to commercial varieties in terms of milling quality. There are 28 advanced F6 lines that quantitatively produce equal or greater amount of flower rice than commercial witnesses, expressed in the two locations studied; however, 7 lines (6 in CEDEGE-Babahoyo and 1 in Santa Lucia), were observed with better percentages of flower grain.