Inheritance of grain yield per plant, flag leaf width, and legth in an 8x8 diallel cross population of bread wheat (T. aestivum L.)

Jinks-Hayman tipi analiz metodu uygulanmasıyla 8x8 diallel ekmeklik buğday melez populasyonunda bitki başına dane verimi, bayrak yaprak uzunluğu ve genişliğinin kalıtımı araştırılmıştır. Araştırmada Ege Bölgesinde yaygın olarak yetiştirilen sekiz ekmeklik buğday çeşidi olarak Cumhuriyet, Kaşifbey, Ziyabey, Marmara, Basribey, Malabadi, Yüreğir ve Seri-82 kullanılmıştır. Denemedeki melezleme işlemleri 2001 Mart-Mayıs aylarında; tarla denemeleri ise Ekim 2002 - Temmuz 2003 tarihleri arasında yapılmıştır. Verilerin analiz edilmesi neticesinde bayrak yaprak genişliği için eklemeli varyans komponenti (D), bayrak yaprak genişliği ve bitki başına tane verimi bakımından dominantlık varyans komponentinin (H,) önemli olduğu tespit edildi. Dominantlık düzeyi (h2) ve düzeltilmiş dominantlık değerleri (H2) üzerinde çalışılan üç özellik içinde önemli bulunmuştur. (P < 0.01). Wr/Vr grafiği bakımından incelendiğinde bitki başına dane verimi ve bayrak yaprak genişliği karakterleri aşırı dominantlık değerleri gösterirken bayrak yaprak boyu karakteri kısmi dominantlık özelliği göstermişlerdir.Bayrak yaprak uzunluğu bayrak yaprak genişliği ile pozitif ve önemli korelatif ilişkiye sahip sahip olduğu bulunmuştur (r = 0.803). Yüreğir ve Malabadi genotiplerinin melez kombinasyonunun maksimum bayrak yaprak alanı için en uygun kombinasyon olduğu tespit edilmiştir.

8x8 diallel ekmeklik buğday (T. aestivum L.) melez populasyonlarında bitki başına dane verimi, bayrak yaprak uzunluğu ve genişliğinin kalıtımı

The inheritance of grain yield per plant, flag leaf width, and flag leaf length was studied applying Jinks-Hayman diallel analysis in an 8 x 8 wheat cross population involving the bread wheat (T. aestivum L.) genotypes Cumhuriyet, Kaşifbey, Ziyabey, Marmara, Basribey, Malabadi, Yüreğir, and Seri-82. The crosses were made by hand, without reciprocals, in field conditions from March to May 2001, and the field experiment was conducted during the October 2002 to June 2003 growing season. The analysis of data showed that the additive variance component (D) was significant for flag leaf width (P < 0.01). The dominance variance component (H,) was significant for flag leaf width and grain yield per plant. The dominance level variance component (hz) and corrected dominance variance component (H2) were significant for all 3 traits studied (P < 0.01). The Wr/Vr graphs indicated overdominance for grain yield per plant and flag leaf width, while partial dominance was inferred for flag leaf length. Flag leaf length was significantly and positively correlated with flag leaf width (r = 0.803). Yüreğir x Malabadi crosses should be considered for maximizing photosynthetic area of the leaf.

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