Genetical Studes on Rice Plant. XVI. : Some genes responsible for yellow, brown and black color of glume

In regards to the glume color of rice, six colors are noted : a) normal or colorless ; b) yellow to gold ; c) grey to black ; d) brorn ; e) red to purple ; f) olive. The present report deals with genes responsible for the glume colors oth. er than red, purple, tawny (a kind of brown) and olive. Some varieties, especially those which belong to " Indica ", have yellow pigment in the cell wall of the glume. These glumes are a pale yellow at first but change to yellowish brown or gold on ripening. The authors are concerned with two types of this coloration ; one is self colored and is called "ripening gold ", and the other "dark furrows " in which only the inter-veins are colored. According to previous workers such as Parnell et al "gold " is single donrinant over colorless and " furrow " is the result of the existence of a supressor, acting on "gold ". The authors made similar cross experiments, coming however to a quite different conclusion., namely ; i) " gold " is single recessive (gene symbol rg) to colorless without exception, ii) "furrow " is due to a dominant gene F, and iii) the coexistence of F and its supressor I or the deficiency of F give birth to colorless.