TITLE:
Additive Main Effects and Multiplicative Interaction and Other Stability Analyses of Tef [Eragrostis tef (Zucc.)Trotter] Grain Yield
AUTHORS:
Alemayehu Balcha
KEYWORDS:
AMMI Analysis, Stability, Rank Correlations, Grain Yield, Tef, Eragrostis tef
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.11 No.6,
June
22,
2020
ABSTRACT: Tef
[Eragrostis tef (Zucc.)Trotter]) is one of the most important cereal crops grown in
Ethiopia. Tef production has been partly constrained by low yield and less
stability of the genotypes under cultivation. Field experiments were carried
out in Halaba, Loka Abaya, Bensa and Areka, South Ethiopia, from August to
November, during 2016 and 2017 main cropping seasons, in order to estimate
yield stability and the association between AMMI
analysis and other stability parameters. Experiments were laid out in randomized
complete block design with three replications using fourteen improved tef
genotypes. Mean yield for Halaba, Loka Abaya2016, Loka Abaya2017, Bensa,
Areka2016 and Areka2017 was 0.99, 0.45, 0.48, 1.50, 1.62 and 0.77 tons/ha,
respectively. Genotypes Amarach, Boset,
Simada, and Tseday exhibited high mean yield of 1.09, 1.10, 1.07 and 1.07
tons/ha, respectively. AMMI stability value (ASV) ranged from 0.17 (genotype
Lakech) to 1.40 (Amarach); yield stability index (YSI) from 7 (Lakech) to 25
(Quncho); and superiority measure (Pi)
from 0.015 (Boset) to 0.145 (Dega Tef). Rank correlation of yield with Pi (r = 0.97, p Wi and δi2 (r = 0.85, p Wi and δi2 (r =
1.00, p was high. Rank correlation of YSI with yield (r = 0.57, p , ASV (r = 0.75, p 1), and Pi (r = 0.68, p 1) and Wi and δi2 (r = 0.67, p genotypes Etsub, Simada and Tseday would be recommended
for high yield and wide adaptation, and ASV would be used alone or jointly with
YSI, Wi and δi2 for ranking of genotypes.