Affiliation:
1. Holetta Agricultural Research Center Holetta Ethiopia
2. Hawassa University Hawassa Ethiopia
3. Debre Zeit Agricultural Research Center Debre Zeit Ethiopia
4. Ethiopian Institute of Agricultural Research Addis Ababa Ethiopia
Abstract
AbstractBackgroundThe performance of oat genotypes differs across environments due to variations in biotic and abiotic factors. Thus, evaluation of oat genotypes across diverse environments is very important to identify superior and stable genotypes for yield improvement.MethodsThe study aimed to assess the interaction (genotype‐by‐environment interaction; GEI) effect and determine the stability of grain yield in oat (Avena sativa L.) genotypes in Ethiopia using parametric and nonparametric stability statistics. Twenty‐four oat genotypes were evaluated in nine environments using a randomized complete block design replicated three times.ResultsThe pooled analysis of the variance of grain yield showed significant variations among genotypes, environments, and their interaction effects. Significant GEI revealed the rank order change of genotypes across environments. The environment main effect captured 44.62% of the total grain yield variance, while genotype and GEI effects explained 28.84% and 26.54% of the total grain yield variance, respectively. The grain yield stability was assessed based on 12 parametric and two nonparametric stability statistics. The results indicated that genotypes with superior grain yield‐ showed stable performance on the basis of the stability parameters of the genotypic superiority index (Pi), the Perkins and Jinks adjusted linear regression coefficient (Bi), and the yield stability index (YSI), indicating that selection using these stability parameters would be efficient for grain yield enhancement in oat genotypes. Spearman's rank correlation coefficients also showed that the stability parameters of Pi, Bi, and YSI had a significant positive association with grain yield. However, grain yield had an inverse correlation with the stability parameters of standard deviation, deviation from regression , the Hernandez desirability index (Dji), Wricke ecovalence (Wi), the Shukla stability variance (σi2), the AMMI stability value (ASV), and environmental variance , indicating that oat genotype selection using these stability parameters would not be efficient for yield enhancement because these stability parameters favor low‐yielding genotypes more, compared to high‐yielding ones.ConclusionsTherefore, G5, G8, G11, G12, G14, G16, G17, G19, and G22 genotypes were adaptable in all nine environments based on stability parameters of Pi, Bi, and YSI, and selection of these superior genotypes would improve grain yield in oat genotypes. However, the validity of this result should be confirmed by repeating the experiment in the same environments over two or more years.
Subject
Plant Science,Agricultural and Biological Sciences (miscellaneous),Agronomy and Crop Science,Ecology, Evolution, Behavior and Systematics
Reference78 articles.
1. Afework L. W.(2017).Genotype × environment interaction and stability analysis of some promising Iluababora coffee (Coffea arabica L.) genotypes for yield and yield related traits in southwestern Ethiopia[MSc thesis Jimma University Jimma Ethiopia].
2. Regression models vs. variance measures as stability parameters of some soybean genotypes;Akram R. M.;Bangladesh Journal of Agricultural Research,2012
3. Stability analysis of seed yield in winter type rapeseed (Brassica napus) varieties;Ali N.;Pakistan Journal of Botany,2002
4. Defining adaptation strategies and yield-stability targets in breeding programmes.
5. Ashenafi A.(2018).Genetic diversity relation between characters and aluminum toxicity tolerance of Avena species from Ethiopia[Doctoral dissertation Addis Ababa University Addis Ababa Ethiopia].
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