Potencial fisiológico de sementes e produção de plântulas de cana-de-açúcar em hibridações da RB92579

Abstract

The objective of this study was to evaluate the physiological potential of the seeds (fuzz, spikelets and caryopses) and the production of sugarcane seedlings in crossing of the RB92579 variety as seed producer and pollen provider. Two experiments were set up in the laboratory and greenhouse of the Agricultural Sciences Center of the Federal University of Alagoas. The experiments were composed of twelve treatments and three replications, totaling a number of 36 plots. The treatments consisted of six genotypes (H64-1881, RB855551, RB92606, RB925211, RB981809 and VAT90-212) crossed with the RB92579 variety in two conditions: 1) seed producer and 2) pollen provider. The data from all the evaluated physiological characteristics in the two experiments were submitted to a variance analysis. The statistical linear model used was one of hierarchical classification. According to the variance analysis revealed by the F test, significant results (p<0.01) were found between the condition of the RB92579 variety as a seed producer and as a pollen provider in the sugarcane crossings, in relation to all the physiological characteristics evaluated in this study. The RB92579 as a pollen receptor presents seeds with low physiological potential and low production of seedling, which should only be used as a pollen provider in sugarcane crossings.