Abstract

Significant genetic variability, as measured by variation among half-sib family means, was found for both oil and protein content after 65 generations of selection in Illinois high oil (IHO), low oil (ILO) high protein (IHP) and low protein (ILP) strains of maize (Zea mays L.). Correlated responses between oil and protein over the 65 generations of selection have been small. Predicted gains per generation based on selection of the upper 20% of half-sib families from a test of one replicate grown at one location in 1 year were slightly higher than those observed as an average of 65 generations for IHP and ILP and lower for IHO and ILO.

Additional index words: Correlated response, Heritability.

Copyright © 1974. . Copyright 1974 Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA