Evaluation of bread wheat genotypes in advanced regional uniform yield trials (ARWYT-Z٢) in southern warm zone (Zone II).
2010
Esmaeil Zadeh Moqaddam, Mohsen | Sayyah Far, Manuchehr | Tahmasbi, Sirus | Amir Bakhtiyar, Nazanin | Maqsudi Nezhad, Karim | Sane`i Nezhad, A`li
This study was carried out to identify high yielding lines/cultivars in comparison to the commercial cultivars. Fourty two lines and cultivars including three checks were studied in one experiment, in three experimental field stations (Dezful, Darab and Khorramabad) in southern dry and warm zone, using Alpha-Lattice design with two replications. These new lines were selected from the preliminary regional yield trials (PRWYT-Z2) of 2008-2009 cropping season. The new lines were compared with CV. Chamran and two promising lines (S-78-11 and S-83-3), regarding grain yield, agronomic performance, adaptability as well as reaction to major diseases in the target areas. These lines were also studied for their reaction to major diseases in known hot spots for Yellow Rust (YR), Leaf Rust (LR), Karanl Bunt (KB), Septorios etc. in special diseases nurseries, under natural and artificial inoculating conditions. Yield potential, desired agronomic characteristics and reaction to major diseases were considered as the main criteria in final evaluation and selection. Statistics such as mean grain yield, mean rank (R), standard deviation of rank (SDR), and agronomic characteristics were used in selection of superior lines. Selected lines had higher grain yield, low R & SDR, greater YIR and desired agronomic characteristic: flowering time, plant height (90-100cm), tolerance /resistance to major diseases, suitable physiological maturity period, desired grain color (Amber is preferred). Thirteen lines based on the above criteria were selected to be studied in the Elite Regional Uniform yield trials (ERWYT) in southern warm and dry zone in the 2010-11 cropping season.
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