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Estimates of Genetic and Environmental Variability in Barley 1
Author(s) -
Rasmusson D. C.,
Glass R. L.
Publication year - 1967
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1967.0011183x000700030005x
Subject(s) - heritability , biology , population , gene–environment interaction , variance components , genotype , zoology , agronomy , statistics , genetics , mathematics , demography , gene , sociology
Two populations of F 3 derived lines of barley were studied in the F 5 , F 6 , and F 7 generations. Variance components and heritability were estimated and genetic advance predicted for each of seven traits. The genotype ✕ 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, σ 2 gly , were generally larger than those of the first order interactions, σ 2 gl , and σ 3 gy 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.