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

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, Kaflifbey, Ziyabey, Marmara, Basribey, Malabadi, Yüreoir, and Seri-82. | Turk J Agric For 30 (2006) 339-345 © TÜB‹TAK Inheritance of Grain Yield per Plant, Flag Leaf Width, and Length in an 8 x 8 Diallel Cross Population of Bread Wheat (T. aestivum L.) fiahin DERE1,*, Metin Birkan YILDIRIM2 1 Ordu University, Faculty of Agriculture, Department of Field Crops, 52200 Ordu - TURKEY 2 Ege University, Faculty of Agriculture, Department of Field Crops, 35100 ‹zmir - TURKEY Received: 19.07.2006 Abstract: 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, Kaflifbey, Ziyabey, Marmara, Basribey, Malabadi, Yüre¤ir, 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]; 6) The heritability of the traits were 0.012 H (narrow sense) and 0.449 H (broad sense) for grain yield per plant, 0.074 H (narrow sense) and 0.501 H (broad sense) for flag leaf length, and 0.066 H (narrow sense) and 0.480 H (broad sense) for flag leaf width; 7) The negative r value between parents’ values with Wr/Vr indicates that the direction of dominance can vary according to the parents. The inheritance of grain yield per plant can be obtained from the Wr/Vr graph (Figure 1). Overdominance can be inferred from this graph since the regression line cuts the Wr axis below the origin. As shown by Walia et al. (1993), Sajid (1995), and Chowdhry (2002), these results are in agreement with our findings for grain yield per plant; however, partial dominance for grain yield per plant has been reported 37.85 (Yıldırım, 1977; Subhani et al., 1997; Sener et al, 2000; Riaz and Chowdhry, 2003). It can be concluded that Cumhuriyet (1), Kaflifbey (2) and .