Trichomes in Segregating Generations of Sorghum Matings. I. Inheritance of Presence and Density

Segregation ratios in successive generations of five single-cross matings between trichomed and trichomeless parents indicated that the presence of leaf trichomes is controlled by a single recessive gene. Inheritance of this character in three crosses among four trichomed parents involved the same locus, designated tr. Trichome density on the abaxial leaf surface varied among trichomed lines from single crosses. Heritability of trichome density between the F3 and F4, estimated in the cross IS1054 X B CK60, was 0.75