Inheritance of Dwarf Character in Rice and its Interrelationship with the Occurrence of Anthocyanin Pigment in Various Plant Parts

A new dwarf mutant called the Profuse tillering dwarf has been described and its inheritance has been shown to be governed by a single recessive gene, designated as dPT.

The F₂ segregation of 54 normal: 10 dwarf, that of 15 normal: 1 dwarf and of 3 normal: 1 dwarf obtained from the three crosses of T.432 (dwarf) with the three normal parents T.90, T.1242 and Geb.24 respectively, has been shown to be due to the interaction of three recessive genes, called d_a, d_b, and d_c, the presence of any two of these being necessary for the production of the dwarf character. The genic constitutions of the four parents have been presented.

The occurrence of anthocyanin pigmentation in different plant parts has been shown to be governed by one to four complementary genes.

The dwarf genes have been shown to be inherited independently of the pigmentation genes.