Journal of Food, Agriculture and Environment

Evaluation of reliability and stability of lentil (Lens culinaris Medik) genotypes in dryland areas of Iran

Author(s):

Rahmatollah Karimizadeh ^1*, Mohtasham Mohammadi ¹, Mohammad Kazem Shefazadeh ²

Recieved Date: 2010-09-30, Accepted Date: 2011-01-22

Abstract:

This study was carried out to determine the yield performances of ten lentil genotypes across five locations in Iran for two years from 2003-2004 to 2004-2005 growing seasons. The goal of this research was to provide biologically meaningful interpretation of genotype-environment (GE) interactions and determine stable genotypes by using adjusted Additive Main effect and Multiplicative Interaction (AMMI) model, environmental variance, b_i regression coefficient and Wricke ecovalence. Reliability of genotypes was evaluated with I_i index. AMMI ANOVA showed that environments, genotypes and GE interactions were highly significant (P<0.01). F_GH1 and F_GH2 tests were done for better control of Type-1 error rates. After use of adjusted AMMI, F_GH1 and F_GH2 indicated only first two IPCA axes of AMMI model were significant at the 0.01 probability level and reminded in the model. The b_i regression coefficient showed genotypes 5 (Flip 92-12L) and 10 (Gachsaran) as the genotypes with the greatest stability because of their b value was significantly lower than 1, but genotype 9 (ILL 6199) possessed average stability due to its regression coefficient near to 1(b_i = 1.02) and can be consider as well adapted genotype across the environments because good mean yield. Genotypes 8 (Flip 96-9L) and 9 (ILL 6199) with the lowest S²and W² _i values (the most stable genotypes) were also within the highest yielding group, and thus performed as the widely adapted genotypes across the test environments in environmental variance and Wricke ecovalence stability methods. Reliability index of genotypes showed that genotypes 9(ILL 6199) and 1(Flip 96-7L) were the most reliable genotypes and were selected in this research. AMMI Stability Value (ASV) parameter of AMMI model correlated significantly and positively with the S² and W²_i stability parameters (r = 0.851**, r = 0.818**, respectively), also two parameters S² and W²_i showed high and positive correlation (r = 0.997***) and reliability index didn’t show any correlation with other parameters. However, genotype 9 with high yield stability in evaluated stability methods, early maturity, high 1000-kernel weight and favorable plant height, was selected for stable and excel genotype in this research.

Keywords:

Lentil, AMMI, yield, GE interaction, stability

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Journal: Journal of Food, Agriculture and Environment
Year: 2011
Volume: 9
Issue: 1
Category: Agriculture
Pages: 432-437

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