Genetic control of leaf spinescence in BRS Imperial, Pérola, and Pico de Rosa pineapple cultivars

Abstract Leaf spinescence in pineapple plants was evaluated a total of 2.014 F1 individuals as follows: 1.125 the progeny Imperial BRS cv. × Perola cross, and 889 Pico de Rosa cross. The genetic hypothesis with two loci epistatic interaction piping (P) over spiny (S) trait tested. chi-square test performed on deviations between observed expected numbers based hypotheses formulated. “BRS Imperial” “Perola” “Pico Rosa” progenies segregated into 1:0:1 (spineless:spiny tip:spiny), expressing phenotypes their respective parents. spineless leaf (“BRS Imperial”) is determined by “Ppss” genotype, locus “P” heterozygosity “S” recessive homozygosity. margin (“Perola” Rosa”) controlled “ppss” genotype.