Abstract
Conventional and monosomic analyses of the lethality occurring in diallel crosses of eight common wheat varieties led to the following conclusions:
(1) Lethality is controlled by two dominant complementary genes.
(2) The gene in Prelude is located on chromsome V and designated as Le1.
(3) The gene in Kharkov and Jones Fife is the same; it is located on chromsome XIII and designated as Le2.
(4) Chinese Spring, S-615, Red Bobs, Elgin and Red Egyptian carry the recessive normal alleles of both genes.
(5) The genetic penetration of the recessive normal gene is about 0.05%.
The experimental results indicate that monosomic analysis, using an incomplete monosomic series, can be successfully applied when a few major genes are involved in the inheritance of a specific character.
