Association of Stability Models in Measuring Stability of Common Bean Varieties
Journal Title: Journal of Experimental Agriculture International - Year 2016, Vol 10, Issue 5
Abstract
Plant breeders have been challenged with genotype by environment (G x E) interaction to develop high yielder and stable varieties. They have been using different univariate stability models to simplify the challenge. The major ones are coefficient of variation (CVi), absolute rank difference (Si1), variance of rank (Si2), σi2, Wi, bi, Si2d, Pi, ASV and r2. This study was designed in order to increase information on the associations and reliability that might exist among stability models. The study was carried out on 15 common bean varieties replicated three times at Kobo, Sirinka, Jari, Chefa, Shewarobit and Kogo in 2011-2012 and 2012-2013 in Ethiopia. A combined analysis of variance, stability statistics and rank correlations among stability parameters and yield were determined. The varieties differed significantly for seed yield at P = 0.001. The different stability parameters were categorized into three types. Based on the correlation analysis SY, CVi (type I), Pi, (type II), bi and r2 (type III) were strongly correlated. Moreover, Si1, Si2 (type I), Wi2, σi 2(type II), Si2d and ASV (type III) were correlated at P = 0.01. On the other hand, SY with CVi and Pi; CVi with bi and r2; bi with Pi; Pi with r2 were correlated negatively at P = 0.01 while r2 with Si1, Si2, Wi2 and σi2 were moderate and negatively correlated. Coefficient of determination (r2) had strong association with eight of the stability parameters. AMMI Stability Value (ASV) and deviation from regression (Si2d) had also strong association with five of the models. Consequently, they can explain stability of varieties better following coefficient of determination. Thus, bean breeders can use those three stability models for better explanation and interpretation of G x E interaction of varieties/genotypes.
Authors and Affiliations
Nigussie Kefelegn, Firew Mekbib, Yigizaw Desalegn
Effects of Rootstock Type and Scion Cultivar on Grafting Success and Growth of Mango (Mangifera indica L.) Seedlings
Aim: To evaluate the effects of three types of rootstocks: (i) Ngwangwa (ii) Sindano and (iii) Zinzi commonly used in the coastal belt of Tanzania on grafting success and seedling growth of six improved mango cultivars:...
Kunyima Procedure to Study Enzymatic Mechanism in Cassava Cyanide Removal: Case of Sassou Variety (Democratic Republic of Congo)
Despite many publications on cyanide elimination in cassava by soaking in water, it still remains our preoccupation because the techniques elaborations of cyanide removal depend on a good uptake of phenomena. The traditi...
Evaluation of Ugandan Cowpea Germplasm for Yield and Resistance to Scab Disease
Aims: This study was conducted to identify cowpea (Vigna unguiculata) cultivars with high yield potential and resistance to scab disease caused by Sphaceloma sp. in Uganda. 100 cowpea genotypes were evaluated at two loca...
Effect of Stocking Density and Partitioning of Rearing Period on Growth, Feed Utilization and Production of Common Carp Cyprinus carpio Raised in Floating Cages
The effect of stocking density and partitioning of raising period on growth and economic feasibility for common carp Cyprinus carpio was investigated using four wooden floating cages (16 m3 per cage) at Tigris river, Sou...
Effect of Replacement of Soybean Meal with Leucaena leucocephala Leaf Meal on Performance, Haematology, Carcass Measures and Organ Weight in Broiler Chickens
This study was carried out to determine the effect of replacing soybean meal (SBM) with Leucaena leucocephala leaf meal (LLM) in the diet of broiler chickens. One hundred and fifty one-day-old broiler chicks were allotte...