Inheritance of dwarfness in common wheat

Pao, W.K.; Li, C.H.; Chen, C.W.; Li, H.W.

Inheritance of dwarfness in common wheat

1944

Pao, W.K. | Li, C.H. | Chen, C.W. | Li, H.W.

Dwarf wheat plants were first obtained in F2 of crosses between Quality and P165 and between P165 and 25V112. They were also found in other crosses later. From the mode of segregation, the results can be explained on the assumption of an interaction of three complementary factors, D1, D2, and D3, and two duplicate factors, D'1 and D'3, with an addition of an inhibitor, I. The presence of all three complementary factors or a substitute of its respective duplicate factor is necessary for the manifestation of dwarf plants. The recessive condition of one of these three essential factors will give a normal plant. The presence of the inhibitor I in the presence of the three essential factors for dwarf plants also results in the production of normal plants. This assumption is substantiated further by F3 data, by data obtained in progenies of dwarf plants, and by data obtained from crossing dwarf plants to the multiple recessive stock 2905. Duplicate factor D'2 is postulated in explaining the results obtained from crossing (Onas X Fawn) to Quality and (Peiteng X Fawn) to Quality. Altogether there are three basic complementary factors, D1 D2 D3, three duplicate factors, D'1 D'2 D'3, and an inhibitor, I, that have been used to account for the genetical explanation of dwarfness in wheat. The probable genetical constitution of the different parents used is tabulated.

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