Disomic Inheritance of Anthocyanins and Flavonol Glycosides in the Tetraploid Tuberbearing species Solanum stoloniferum

Ten clones of Solamun stoloniferum Schlechted (2n -- 4x -- 48)were selected from seedling populations that were produced by self-pollinating five introductions from the Commonwealth Potato Collection. These clones were used to produce S1, F1, F_o, and testcross populations. Clones and their progeny were scored for anthocyanins and flavonol glycoside~ in their corollas, stems, and leaves. Thin-layer chromatography (TLC)was used to separate and identify polyphenol compounds. No segregation for eight traits was observed within S1 and F1 families. Segregation was observed in F2 and testcross populations for anthocyanins (derivatives of delphinidin and cyanidin, inhibited when the gene F is homozygous recessive); and flavonol glycosides (Q4 : quercetin 3-glucosyl-rhamnosylglucoside, controlled by the gene G1; and L1 -- luteolin 7- glucoside, controlled by the gene L1)extracted from corollas. Observed ratios fitted ratios expected for disomic inheritance, differed from expected tetrasomic ratios, and provided additionaI evidence that the parental clones are homozygous. Genes F, G1, and L1 were genetically independent in dihybrid and trihybrid F2 crosses.