M. MOHAMMADİ, R. KARİMİZADEH, N. SABAGHNİA, M. K. SHEFAZADEH

Estimating genotypic ranks by several nonparametric stability statistics in Barley(Hordeum vulgare L.)

Farklı çevre koşullarında bir genotipin verim stabilitesine değerlendirilmesi, hem bu genotiplerin çiftçiler için tavsiyesinde yararlıdır hem de bitki ıslahı programlarında bir gereklilik olmalıdır. On-altı adet arpa (Hordeum vulgare L.) genotipi dört araştırma lokasyonunda üç yıl test edilmiştir. Denemeler, yedi adet parametrik olmayan stabilite istatistiğini, verim stabilitesini analiz etmek için dört tekrarlamalı tesadüf blokları deneme deseninde kurulmuştur. Birleşik varyans analizi çevre, genotip ve çevre-genotip interaksiyonunun temel etkilerininin önemini belirtmiştir. Tüm genotipler için genel ortalama tane verimi 3804,91 kg/ha (G1)’dan 3119,27 kg/ha (G13)’a kadar değişmiştir. S3, S4, S5 ve S7 istatistiklerine dayalı olarak en istikrarlı genotipler, G4, G5 ve G10 iken, S1 ve S2 parametrik olmayan stabilite istatistiklerine dayalı olarak en istikrarlı genotipler, G7, G10 ve G11 olarak bulunmuştur. Ortalama verim ile ilgili olarak, genotip G10 (3560,91 kg/ha), en uygun genotip olarak belirlenmiştir. Bu çalışmada, parametrik olmayan stabilite istatistiklerinden hiçbiri yüksek ortalama verim ile olumlu ilişkili bulunmamıştır ve bunun yerine stabilitenin statik bir kavramı olarak karakterize edilmiştir. Faktör analizi ve parametrik olmayan stabilite istatistiklerinin korelasyon analizi sonuçları, S1 ve S2’nin stabilite için seçilmelerinin için yararlı olacağını göstermiştir.

Anahtar Kelimeler:

Adaptasyon, Çevre-Genotip interaksiyonu, Çoklu-Lokasyon denemeleri, Verim stabilitesi

Arpa'da Bazı Parametrik Olmayan Stabilite İstatistiği Kullanarak Genotipik Sıralamanın Tahmini

Assessment of the yield stability of genotypes to various test environments is useful for recommending them for farmers and should be a requirement in plant breeding programs. Sixteen barley (Hordeum vulgare L.) genotypes were tested at four research locations for three years. The trials involved a randomized complete block design with four replications in which seven nonparametric stability statistics were used to analyze yield stability. The combined analysis of variance indicated the significance of the main effects of environments and genotypes as well as genotype by environment interaction. The overall mean grain yield for all the genotypes ranged from 3804.91 kg ha for G1 to 3119.27 kg ha for G13. The most stable genotypes based on the S1 and S2 nonparametric stability statistics, were G7, G10 and G11 while the most stable genotypes based on the S3, S4, S5 and S7 statistics, were G4, G5 and G10. Regarding mean yield, it could be grasped that genotype G10 (3560.91 kg ha ) was the most favorable genotype. In this study, none of the nonparametric stability statistics were positively associated with high mean yield, and instead characterized a static concept of stability. The results of factor analysis and correlation analysis of the nonparametric stability statistics and mean yield indicated that S1 and S2 would be useful for selecting for stability.

Keywords:

Adaptability, Genotype by environment interaction, Multi-environment trials, Yield stability,

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