RAPD-based genetic relationships in different o Bougainvillea cultivars
Talge Aiex Boni; Alberto José Prioli; Sônia Maria Alves Pinto Prioli; Léia Carolina Lucio and Rodrigo de Mello
Abstract: The purpose of this study was to investigate aluminum tolerance in maize. For this purpose, a nutrient solution was used with the tolerant (L922) and sensitive (Ast214) homozygous parental lines, with the segregating generation F2 and with the F2:3 lines derived thereof. Seeds were germinated on paper and seedlings transferred to a nutrient solution containing 4.5 mg L-1 aluminum. In the experiments involving F2:3 derived lines groups of rows with F2:3 plants were intercropped with rows of eight seedlings of the parental lines in a completely randomized block design. Results of the F2 generation demonstrated a bimodal distribution of relative frequencies, with approximately three times more seedlings in the tolerant group. This suggests the participation of only one locus in tolerance inheritance. The narrow-sense heritability (F2, F2:3) of seminal root length of F2 plants and means of F2:3 lines was 0.49, which partially explained the bimodal frequency distribution of means of F2:3 lines, but was not accurate enough to differentiate tolerant from sensitive groups.