Parametric stability analyses for grain yield of durum wheat

Autor: Yuksel Kaya, Ramazan Ayranci, Mevlüt Akçura, Seyfi Taner
Rok vydání: 2006
Předmět:
Zdroj: Plant, Soil and Environment. 52:254-261
ISSN: 1805-9368
1214-1178
DOI: 10.17221/3438-pse
Popis: Grain yield of 15 durum wheat (Triticum durum Desf.) genotypes consisting of 13 cultivars and 2 advanced lines, tested in a randomized complete block design with four replications across 8 environments of Central Anatolian Region of Turkey was analyzed using nine parametric stability measures. The objectives were to assess genotype -environment interactions (GEI), determine stable genotypes, and compare mean grain yield with the parametric stability parameters. To quantify yield stability, nine stability statistics were calculated (b i , S 2 di , R i 2 , W i 2 , σ i 2 , S 2 i , α i and λ i ). Yilmaz-98, Cakmak-79, Kiziltan-91, Selcuklu-97 and C-1252 were more stable cultivars, which had 9, 8, 6, 6, 6 out of all 9 stability statistics used, respectively. Especially, among these cultivars, Yilmaz-98 and Cakmak-79 were the most stable cultivars. Furthermore, three-dimensional plots of mean response versus each stability statistic were shown to visually evaluate the yield potential and stability estimates of the genotypes. Genotype mean yield ( – x) was significantly positively correlated to the regression coefficient (b i ), environmental variance and genotype to the environmental effects (α i ), indicating that high grain yielding genotypes had larger values b i , S 2 , and α i , S 2 , W i , CV i , α i and b i , were significantly correlated, indicating that they measured similar aspects of stability.
Databáze: OpenAIRE
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