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Male bud characteristics of diploid, triploid and tetraploid bananas

Jaitrong, S., Manthey, J. A.
Acta horticulturae 2018 no.1210 pp. 171-176
bananas, color, cream, diploidy, genome, males, tetraploidy, triploidy
Differences in male bud characteristics of diploid (2n), triploid (3n) and tetraploid (4n) bananas were characterized. This included comparisons of bud shape, bract color, male flower color and color characteristics (Hunter CIELAB). Male bud shapes of three genome groups show a diversity, including ovate, broadly ovate, and lanceolate with acute and obtuse bract apex. Bract color was reddish brown to reddish purple. Bract outside color in diploid banana ('Nam Thai' and 'Ta Nee') were brownish green to purple red, L* = 40.86 to 42.88, C* = 18.76 to 19.68 and H° = 18.76 to 47.99, while the outside bract colors of triploid banana ('Hom Kheio Kom', 'Sam Duan', 'Hin', 'Namwa', 'Huk Mook Som' and 'Thep Panom') were brownish red to purple red or deep purple, L* = 36.70 to 81.25, C* = 10.28 to 36.53 and H° = 19.81 to 279.9. In contrast, the outside bract color of tetraploid banana ('Thep Parod' and 'Thip Parod') was purple red, L* = 42.77 to 43.98, C* = 9.98 to 24.51 and H° = 11.78 to 19.90, respectively. Bract inside color of three genome groups were reddish orange to red purple, L* = 42.05 to 45.56, C* = 31.77 to 35.76 and H° = 27.41 to 29.68, respectively. Male flower color in diploid banana was creamy white-yellow, while creamy white-yellow in triploid and yellowish cream and pinkish purple in tetraploid bananas, respectively.