Genotype x environment interaction and stability analysis for dry matter and seed yield in field pea (Pisum sativum L.)

Abstract

The objectives of this study were to evaluate dry matter (DM) yield and seed yield of six leafed and semi-leafless pea (Pisum sativum L.) genotypes, and to compare them for these traits. Evaluation of genotype × environment (G × E) interaction, stability and cluster analysis were also carried out at eight diverse locations with typical Mediterranean and Mediterranean-type climate during the 2001-2002 and 2002-2003 growing seasons. Significant differences were found among the pea genotypes for DM and seed yield on individual years and combined over years, and in all locations. All interactions which related to G × E interaction showed significance (P>0.001) for DM and seed yield. The highest yield (4789 kg ha -1 ) was obtained from the leafed genotype 'Urunlu'. However, stability analysis indicated that for DM yield, the leafed genotypes 'Golyazi' and 'Urunlu' should be grown in low yielding and high yielding environments, respectively. Cluster analysis, based on grouping locations, showed that P101 was the preferred variety in low yielding environments, and P98, in high yielding ones. It was suggested that the use of both stability and cluster analyses might give better results. Comparison of cluster and stability analyses showed that the stability analysis fails to recommend cultivars to different regions where yield potential showed significant differences. It seems, however, that cluster analysis could be a powerful tool to examine G × E interaction. If the number of environments was sufficient, a separate stability analysis could be run in each cluster.Additional key words: adaptation, cluster, leafed and semi-leafless peas, Mediterranean conditions, stability. ResumenInteracción genotipo × ambiente y análisis de estabilidad para rendimiento de materia seca y de semilla en guisante (Pisum sativum L.)Los objetivos de este estudio fueron evaluar y comparar el rendimiento de materia seca (DM) y de semilla de seis genotipos de guisante con hojas convencionales y semiafilas. Además, se evaluó la interacción genotipo × ambiente (G × E) y se realizaron análisis de estabilidad y tipo cluster en ocho localidades de clima mediterráneo, durante las temporadas 2001-2002 y 2002-2003. Se encontraron diferencias significativas entre genotipos para rendimiento de DM y de semilla, tanto para años individuales como combinados, así como en todas las localidades. Todas las interacciones G × E fueron Field pea adaptation and stability 97 significativas (P>0,001) para rendimiento en DM y semilla. Se obtuvo la producción más alta (4789 kg ha -1 ) con el genotipo de hoja convencional 'Urunlu'. El análisis de estabilidad indicó que, para rendimiento en DM, los genotipos 'Golyazi' y 'Urunlu' deben cultivarse en ambientes de baja y alta producción, respectivamente. El análisis cluster, basado en agrupamiento de localidades, mostró que la variedad P101 fue la mejor en ambientes de baja producción, y la P98 en los de alta producción. Al comparar los análisis de estabilidad y de tipo cluster se vio que el primero falla al recome...

Hay Yield, Quality Traits and Interspecies Competition of Forage Pea – Triticale Mixtures Harvested at Different Stages

“…Tatlicak (T)) were sown as monocrops and in mixtures (75 P:25 T, 50 P:50 T and 25 P:75 T) in the first and the last week of November of the first and second growing seasons. The seeding rates for forage pea and triticale monocrops were 100 and 500 seeds per m 2 , respectively (Mut et al, 2006;Acikgoz et al, 2009). While the number of triticale seeds in mixtures (75 P:25 T, 50 P:50 T and 25 P:75 T) was 125, 250 and 375 seeds per m 2 , it was 75, 50 and 25 seeds per m 2 for forage pea.…”

Mediciones no paramétricas corregidas y sin corregir en ensayos multiambientales de estabilidad con trigo duro

“…Considering the increased use of nonparametric stability measurements in plant breeding research, it is essential to investigate the effect of correction on these statistics. Most plant breeders are interested in simultaneous selection for both mean yield and stability (Mekbib, 2002;Acikgoz et al, 2009). Therefore, the main objective of this investigation was to study the effect of correction on Thennarasu's (1995) nonparametric measurements of phenotypic stability in durum wheat multi-environmental trials.…”

Stability Analyses for Seed Yield of Chickpea (Cicer arietinum L.) Genotypes in the Western Cold Zone of Iran

“…In this study, the best estimated model has obtained via two IPC1 and IPC2 components. Although some authors suggest use of four main components as necessity to estimate the AMMI model (Thillainathan & Fernandez, 2001); however, review of the literatures suggests that factors such as the type of crop plant, germplasm diversity, and range of environmental conditions are effective on the degree of complexity of the estimated model (Malhotra & Singh, 1991;Atta & Shah, 2009;Acikgoz et al, 2009). …”