Evaluation of Drought Resistance Indicates for Yield and Its Components in Three Triticale Cultivars

tritikale çeşitlerinin geliştirilmesi pek çok ıslah programının amacıdır fakat bugüne kadarki başarı sınırlı kalmıştır. Bu çalışma, kuraklık stresi altında verim, verim ögeleri ve tane özellikleri bakımından tritikale çeşitleri (Tatlicak 97, Karma 2000 and MIKHAM 2002) arasındaki farklılıkları incelemek amacıyla yürütülmüştür. Verim performansları farklı üç tritikale çeşidi 2006-2007 üretim sezonunda, Eskişehir, Türkiye"de sulu ve kuru koşullar altında farklı denemelerde yetiştirilmiştir. Çalışmada, stres duyarlılık indeksi (SSI), stres tolerans indeksi (STI), tolerans (TOL), verim indeksi (YI), verim stabilite indeksi (YSI), ortalama verimlilik (MP) ve geometrik ortalama verimlilik (GMP) indeksleri hesaplanmıştır. Kuraklık stresi altında en iyi verime sahip olan çeşit, en düşük duyarlılık indeksine sahip olmasına karşılık Karma 2000"dir. Bu çeşit, tritikalede kuraklığa dayanımı geliştirmek için ıslah programlarında kullanılabilir

Üç Tritikale ÇeGidinde Verim ve Verim Komponentleri Gçin Kuraklığa Dayanım Gndekslerinin Değerlendirilmesi

Drought is a wide-spread problem seriously influencing cereal production and quality. The development of triticale cultivars which are tolerant to drought is an objective in many breeding programmes, but so far success has been limited. This study was carried to examine differences in yield and yield components and kernel features among triticale cultivars (Tatlicak 97, Karma 2000 and MIKHAM 2002) under drought stress. Three triticale cultivars with different yield performance were grown in separate experiments under the rain fed and irrigated conditions at Eskisehir, Turkey, in 2006-2007 growing season. In the study, susceptibility index (SSI), stress tolerance index (STI), tolerance (TOL), yield index (YI), yield stability index (YSI), mean productivity (MP) and geometric mean productivity (GMP) were calculated. The best yielding cultivar under the drought stress, hence having a low susceptibility index, was Karma 2000. This cultivar may be utilized for improvement of drought resistance in triticale breeding programmes

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