The salinity is a common factor of abiotic stress that seriously affects the agricultural production where it is found. one of the strategies to promote reincorporation of salinity areas and the productivity increasing consists in development and selection of tolerant genotypes, which allows parental identification for crossings. This research aimed to identify the salinity tolerance among banana diploid genotypes to be used in future works of genetic improvement to saline soils of Brazilian northeast region. Nine banana diploid genotypes (AA) were evaluated for growth variables as leaf area, height, diameter of pseudostem, leaves number, weight of fresh and dry matter. During 21 days, the plants were treated with 0 and 100 mM of NaCl, in an entirely randomized experimental delineation with three repetitions. After 21 days, the determination of fresh matter weight was released using analytic balance. The attainment of the each plant dry matter weight from foliar limbo, pseudostem and root+rizome was carried out through drying in greenhouse at 65ºC until constant weight. The Tjau Lagada genotype, which suffered minor reduction of leaf area, can possibly show a higher production despite other genotypes analyzed in this study. The genotype 0116-01, presenting a greater salinity tolerance, could be used in future crossings providing genes to be incorporated in productive cultivars by improvement programs which aims the adaptive cultivars to Brazilian northeast saline soils.
saline stress; banana; growth parameters; genetic improvement
