The Journal "Agriculture and Forestry"
Časopis "Poljoprivreda i šumarstvo"
- Since 1955 -
Year 2013, Volume 59 Issue 2
| Year : | 2013 |
| Volume : | 59 |
| Issue : | 2 |
| Authors : | Naser SABAGHNIA, Mohtasham MOHAMMADI, Rahmatollah KARIMIZADEH |
| Title : | INTERPRETING GENOTYPE × ENVIRONMENT INTERACTION OF BEARD WHEAT GENOTYPES USING DIFFERENT NONPARAMETRIC STABILITY STATISTICS |
| Abstract : | Evaluation of yield stability is essential in multi-environment trials which can be performed through various statistical methods. The stability of 18 bread wheat (Triticum aestivum L.) genotypes was determined using several nonparametric stability statistics across 11 environments. Highly significant genotype × environment (GE) interaction suggested differential performance of genotypes across three seasons for four test locations. Results of five distinct nonparametric tests verified combined ANOVA and showed that there were both crossover and non-crossover GE interactions. According to S1, S2, S3, S4, S5 and S6 nonparametric stability statistics, genotypes G10 and G14 were the most stable genotypes while based on NP1, NP2 and NP4 nonparametric stability statistics, genotypes G5, G10 and G14 were the most stable genotypes. In this investigation, high values of Top measure was associated with high mean yield, but the other nonparametric stability statistics were not positively correlated with mean yield and instead characterized a static concept of stability. Clustering of the genotypes according to mean yield and nonparametric stability statistics indicated that there were three genotypic groups with different characteristics. The results of principal component analysis of nonparametric stability statistics and mean yield indicated that only nonparametric superiority index would be useful for simultaneously selecting for high yield and stability. Finally, genotypes G5 (3065.59 kg ha-1) and G9 (3027.27 kg ha-1) were found to be the most favorable genotypes and are thus recommended for commercial release in semi-arid areas of Iran. |
| For citation : | Naser SABAGHNIA, Mohtasham MOHAMMADI, Rahmatollah KARIMIZADEH (2013): INTERPRETING GENOTYPE × ENVIRONMENT INTERACTION OF BEARD WHEAT GENOTYPES USING DIFFERENT NONPARAMETRIC STABILITY STATISTICS. Agriculture and Forestry, Vol. 59. Issue 2: 21-35, 2013, Podgorica. ISSN 0554-5579 (Printed), ISSN 1800-9492 (Online). |
| Keywords : | adaptation, multi-environmental trials, yield stability |
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