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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.), Şahi̇n Dere, Meti̇n Bi̇rkan Yildirim
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.), Şahi̇n Dere, Meti̇n Bi̇rkan Yildirim
Turkish Journal of Agriculture and Forestry
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_1) was significant for flag leaf width and grain yield per plant. The dominance level variance component (h^2) and corrected dominance variance component (H_2) 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.
Inheritance Of Cold Tolerance In Common Wheat (Triticum Aestivum L.), Omid Sofalian, Seyyed Abolghasem Mohammadi, Saeid Aharizad, Mohammad Moghaddam, Mohammad Reza Shakiba
Inheritance Of Cold Tolerance In Common Wheat (Triticum Aestivum L.), Omid Sofalian, Seyyed Abolghasem Mohammadi, Saeid Aharizad, Mohammad Moghaddam, Mohammad Reza Shakiba
Turkish Journal of Agriculture and Forestry
Low temperature is one of the most severe abiotic stresses limiting wheat growth, productivity, and distribution. Understanding the genetic nature of cold and frost tolerance is regarded as the primary step in wheat breeding programs. This study used a winter wheat cultivar, Norstar, which has a high level of cold tolerance (LT_{50} = -22.3 ºC), and a highly cold-susceptible Iranian spring wheat variety, Zagros (LT_{50} = -3.5 °C), as parental lines to develop different generations. Seven generations, P_1, P_2, F_1, F_2, F_{2:3}, BC_1, and BC_2, were used for generation mean and generation variance analysis for estimating genetic effects and variances, …
Calculation Of Adjustment Factors For Standardizing Lactations To Mature Age And 305-Day And Estimation Of Heritability And Repeatability Of Standardized Milk Yield Of Simmental Cattle Reared On Kazova State Farm, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Calculation Of Adjustment Factors For Standardizing Lactations To Mature Age And 305-Day And Estimation Of Heritability And Repeatability Of Standardized Milk Yield Of Simmental Cattle Reared On Kazova State Farm, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Turkish Journal of Veterinary & Animal Sciences
Adjustment factors of lactation milk yield to mature age and 305-day were calculated and heritability and repeatability of milk yield were estimated for Simmental cows reared on Kazova State Farm. A total of 1549 lactation records of Simmental cows reared on Kazova State Farm between 1992 and 2002 were used. The factors for standardizing incomplete lactations to 305-day were estimated by taking 7 calving age groups into consideration (2, 3, 4, 5, 6-8, 9 and 10 years of age and older). The factors for standardizing to mature equivalent estimated by polynomial regression are between the 24^th and 143^rd month and …