TAILIEUCHUNG - GGE-biplot analysis of multi environment yield trials in bread wheat

Yield data of 25 bread wheat genotypes tested across 9 rain-fed environments during the 2002-2003 growing season were analyzed using the GGE (. G, genotype + GEI, genotype-by-environment interaction) biplot method. E (environment) explained 81% of the total (G + E + GE) variation, whereas G and GEI captured and , respectively. | Turk J Agric For 30 (2006) 325-337 © TÜB‹TAK GGE-Biplot Analysis of Multi-Environment Yield Trials in Bread Wheat Yüksel KAYA*, Mevlüt AKÇURA, Seyfi TANER Bahri Da¤dafl International Agricultural Research Institute, . Box: 125, Konya - TURKEY Received: Abstract: Yield data of 25 bread wheat genotypes tested across 9 rain-fed environments during the 2002-2003 growing season were analyzed using the GGE (. G, genotype + GEI, genotype-by-environment interaction) biplot method. E (environment) explained 81% of the total (G + E + GE) variation, whereas G and GEI captured and , respectively. The first 2 principal components (PC1 and PC2) were used to create a 2-dimensional GGE-biplot and explained and of GGE sum of squares (SS), respectively. Genotypic PC1 scores >0 detected the adaptable and/or higher-yielding genotypes, while PC1 scores 0 olan genotipler yüksek verimli ve/veya uyumlu iken, PC1 de¤erleri <0 olan genotipler ise düflük verimli ve/veya uyum sa¤layamayanlar olarak belirlenmifltir. Genotiplerin PC1 de¤erlerinden farkl› olarak, s›f›ra yak›n PC2 de¤erleri stabil genotiplerle ilgili iken, mutlak de¤erleri büyük olan PC2 de¤erleri ise stabilitesi düflük genotiplerle ilgili olmufltur. Di¤er taraftan çevrelerin PC1 de¤erleri, çapraz olmayan GEI, PC2 de¤erleri ise çapraz GEI’ne iflaret etmifltir. Denemede G7, G19 ve G24 genotiplerinin yüksek verimli ve stabil olduklar› belirlenmifltir. Orta Anadolu Platosundan örneklenen deneme çevreleri iki büyük çevreye (ME1 ve ME2) ayr›lm›fl, E1 (Konya), E3 (Obruk), E5 (Haymana) ve E8 (Uflak) ilk büyük çevreyi (ME1), E2 (Çumra), E4 (Ere¤li), E6 (Ulafl), E7 (Eskiflehir) ve E9 (Alt›ntafl) ise ikinci büyük çevreyi (ME2) oluflturmufltur. Di¤er taraftan E2 (Çumra) ise tüm deneme çevrelerini temsil etme ve denenen genotipleri en güçlü ay›rma özelli¤ine sahip olmufltur. Anahtar Sözcükler: Ekmeklik bu¤day (T. aestivum L.), çok çevreli verim denemeleri, GGE-biplot analizi Introduction association between .

• Nông nghiệp
• Bread wheat T
• aestivum L
• Multi environment yield trials
• GGE biplot analysis
• Plant breeding programs
• Genotype focused scaling
• Gene action
• Flag leaf
• Diallel analyses
• Bead wheat T
• genotypes