Author:
Butler D. G.,Redden R. J.,DeLacy I. H.,Usher T.
Abstract
Multi-environment yield trials of navy bean
(Phaseolus vulgaris L.) lines were grown over a diverse
range of locations for the years 1983–1989 in Queensland, in an
unbalanced set of line × location × year combinations. This is the
first in a series of 3 papers reporting different perspectives on the genotype
× environment (G×E) interactions in this series of experiments. In
this paper, restricted maximum likelihood (REML) estimates of G×E
components of variation were derived using trial means in both standard and
extended models where concomitant genotype and location factors such as
maturity, disease resistance, and experimental management regimes were
investigated. Prior to estimating the variance components the heterogeneity of
trial error variances was modelled. Several alternative trialing systems were
compared using acceptance probabilities derived from the variance components.
The interaction of genotype maturity with location considerably reduced the
line × location × year variance component and further examination
of the maturity × environment interaction suggested an advantage in
stratifying the breeding program on maturity. There is no redundancy in the
current trialing system and an increase in sampling locations can be
justified.
Subject
General Agricultural and Biological Sciences
Cited by
6 articles.
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