Agronomic performances, disease reaction and yield stability of field pea (Pisum sativum L.) genotypes in Bale Highlands, Ethiopia

Sixteen field pea (Pisum sativum L.) genotypes were evaluated using Randomized Complete Block Design (RCBD) with four replications for evaluating agronomic performance, reaction to diseases (downy and powdery mildew and ascochyta blight), genotype x environment interaction (GEI) and yield stability across 12 environments during 2004-2006 at highlands of Bale, South eastern Ethiopia. In this study various statistical methods of analyzing agronomic performance, disease reaction and yield stability were used. The analysis of variance (ANOVA) for agronomic characters revealed that there was highly significant (

Analysis of multi-environment yield performance of faba bean (Vacia Faba L.) genotypes using AMMI model

This study was carried out to determine the yield performance of 16 faba bean genotypes across 12 environments at Highlands of Bale, Southeastern Ethiopia in the 2004-2006 growing season. The experimental layout was randomized complete block design with four replications. Yield relative to environmental maximum (YREM) implies that the closer the YREM value to 1, the better performance of the genotype. The performance of the genotypes was generally good. Eighty-one percent [81.25%] (13 genotypes) had YREM of more than 50% while only 18.75% of the genotypes Ace. No. 25041, Ace. No. 25042 and Ace. No. 25194 achieved less than 50% of their potential. In contrast Ace. No. 25194, Ace. No. 25042 and Ace. No. 25041 had the lowest YREM. Regression coefficient plotted against the mean yield indicates that cvs Degaga (G13) and Shalo (G14) are the most stable and adapted to most of the environments. Ace. No. 25041 (G4) is below average stability by specifically adapted to high yielding environments. AMMI analysis of variance indicated that the yield performance of genotypes were under the major environmental effects of genotypes by environmental interaction (GEI). All principal components axis were significant at