Auto- and episegregation for color types in agamospermous progenies of beet (Beta vulgaris L.)

Autosegregation for color types of aboveground and underground parts of plants (root flesh, petioles, and leaf nerves) in agamospermous progenies of sugar beet was analyzed. The ratio of dominant and recessive phenotypes in agamospermous progenies conformed to the model suggesting tight linkage (r = 0.08) between the genes Y/y and R/r controlling biosynthesis of the main pigments, betaxanthins and betacyanins, and the epistatic gene Pip controlling the amount and distribution of pigments in plant tissues. It was shown that color type is inherited independently both of monoanthousness-synanthousness and gene-cytoplasmic sterility-fertility of pollen. The degree of linkage between genes for color type, synanthousness-monoanthousness, and sterility-fertility of pollen estimated by gametic genetics completely coincided with values obtained earlier by methods of zygotic genetics.