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Hood and Awn Development in Barley Determined by Two Gene Pairs¹

Synopsis: Crosses were made with short awned varieties x hooded strains resulting in a 2-factor segregation for hoods, short and long awns, in a 9:4:3 ratio.

Double recessive short awned segregates (kk lklk) must be used in crosses to hooded rather than KK lklk genotypes if a 2-factor segregation is desired.

Crosses were then made using long and short awned barley varieties in which occasionally a ratio of 9: hooded: 3 long awned: 4 short awned plants were obtained in the F₂ generation.

² Research Agronomist, F.C.R.B., A.R.S., U.S.D.A., and former graduate student, Utah State Agricultural College.