Abstract:
Multi-environment trials play a significant role in
selecting the best cultivars to be used
at different locations. The objective of this study
was to identify grain and forage yields
stability of grass pea advanced lines across differ
ent locations. The 14 advanced lines of
grass pea, developed by the International Center fo
r Agricultural Research in Dry Areas
(ICARDA), were tested at three different research s
tations in semi-warm regions of Iran
for three consecutive years. Ten non-parametric mea
sures of stability were used to
identify stable lines across nine environments. Thr
ee non-parametric tests (Bredenkamp,
Hildebrand and De Kroon and Van der Laan) for Genot
ype-Environment (GE)
interaction were highly significant, recommending di
fferential responses of the lines to the
test environments. Mean yields had a significant po
sitive correlation with
S
i
(6)
, NP2, NP3,
NP4, Fox-rank and Kang’s rank-sum statistics. The r
esults of correlation analysis and
principal components analysis indicated that only n
on-parametric superiority measure
could be useful for simultaneous selection of high
yielding and stable lines. According to
cluster analysis by forage and grain mean yields an
d non-parametric statistics, the line L3
with the highest forage and grain yields and Fox-ra
nk as well as the lowest values of other
non-parametric statistics could be introduced as hi
gh yielding stable cultivar for rain-fed
conditions of semi-warm areas.
Keywords:
Fox-rank, GE
interaction, Rain-fed conditions, Interaction effec
t, Grass pea.
