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The research was developed in the Base Scientific Science Unit, Los Palacios, Pinar del Río, belonging to the National Institute of Agricultural Sciences. The objective was to evaluate the influence of temperatures on the germination of four rice cultivars. Seeds of Oryza sativa L. (rice) were analyzed from the cultivars, INCA LP-5, Reforma, INCA LP-2 y Jucarito 104 (J-104). The germination temperatures considered in each trial were 10, 15, 20, 25, 30, 35 and 40 °C. The experimental design used in all cases was completely randomized, each trial was evaluated individually and was repeated twice, we worked with the means of these repetitions. Germinated seeds were counted from their establishment until stabilization, with the data obtained was determined: Percentage of germination, seeds germinated per day and the Maguire Index. The results were subjected to an analysis of variance (ANOVA) with a confidence level of 95 %. The results of this work indicate that there is a sensitivity in the germination process of different rice cultivars to temperature effects. Each cultivar shows a greater or lesser germination resistance depending on the temperature. Therefore, temperature effect in the process is closely related to the genetic material with which it is working. In addition, with a germination speed increase in the increase in temperature, an optimal value is reached and then decreases, regardless of the cultivar. [ABSTRACT FROM AUTHOR]

The Participatory Selection of Cultivars has been shown to be effective in promoting the participation of different stake holder in the genetic improvement process and to know about the preferences of producers. The aim of the study was to identify cultivars with the greatest acceptance and the agronomic criteria of greatest consideration from participants' perspective. The participatory selection was carried out at the Agrodiversity Fair in the Scientific and Technological Unit de Base "Los Palacios", located in the Los Palacios Municipality, Pinar del Río province where growers, technicians and decision-makers of both sexes participated. The effective diversity percentage was determined, cultivars with the greatest acceptance and the most relevant agronomic criteria were identified. Female participation reached 44.8 % and effective diversity was 75 %. DI-77, DN-12 and DI-11 cultivars stood out for their good performance for the locality; the characters with the highest degree of acceptance at the time of selection were number of pods per plant, number of grains per pod, grain size and plant erection. Participatory cultivars selection in chickpea could be an excellent methodology to accelerate cultivars adoption, enrich genetic diversity of this crop and increase yields, also allow training, the interaction of various stake holders and promote gender equality. [ABSTRACT FROM AUTHOR]