A single grain screening technique for breeding alkylresorcinol-poor rye.

A quick and simple semi-quantitative method of selecting single seeds of rye for their content of 5-alkyl-resorcinols is presented. The resorcinols are extracted from whole, intact caryopses with acetone. Under the conditions described the germination rate is hardly decreased. The single grain method offers especially striking advantages when selffertile inbred lines are used.