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Published in Crop Sci 7:185-188 (1967)
© 1967 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Estimates of Genetic and Environmental Variability in Barley1

D. C. Rasmusson and R. L. Glass2

Two populations of F3 derived lines of barley were studied in the F5, F6, and F7 generations. Variance components and heritability were estimated and genetic advance predicted for each of seven traits. The genotype x environment interaction components of variance were smaller than the genotype and plot error components for all traits, except percent nitrogen in one population. Estimates of the second order interaction, {sigma}2gly, were generally larger than those of the first order interactions, {sigma}2gl, and {sigma}3gy Heritability estimates were highest for heading date and diastatic power, intermediate for kernel plumpness, height, and extract, and lowest for yield, for percent nitrogen, heritability was relatively high in population 1 and low in population 2.

Under the conditions of this study, a single trial with 3 replicates gave sufficient information for each of the seven traits to provide favorable odds of including the elite lines if the top 25% were selected.

Data from triplicate determinations of percent nitrogen, percent extract, and diastatic power indicated that replication in our laboratory testing is unnecessary.

Key Words: Hordeum vulgare L. emend. Lam. • malting quality • agronomic traits • genotype x environment interactions • heritability

1 Contribution from the Department of Agronomy and Plant Genetics and the Department of Biochemistry, University of Minnesota, St. Paul, Minn. Paper No. 6104, Scientific Journal Series. Research supported in part by a grant from the Malting Barley Improvement Association.

2 Professor in Agronomy and Plant Genetics and Associate Professor of Biochemistry, University of Minnesota, St. Paul, Minn.

Received for publication October 15, 1966.




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Copyright © 1967 by the Crop Science Society of America.