Abstract
An albino lethal trait, descending from a cross of diploid plants of M. sativa and M. falcata, was studied in S1, F1, F2, F3 and BC1 generations. It was concluded that the albino was controlled by the complementary action of 2 independent recessive genes, designated al and bo. This resulted in segregations of 15 green 1 albino from plants Al al Bo bo and 3 green : 1 albino from Al al bo bo. Mesophyll cells in green cotyledons all contained chloroplasts, whereas the cells from albinos were completely lacking developed plastids.