ارزیابی ژنوتیپ های گندم نان در آزمایشات مقایسه عملکرد پیشرفته ‭(ARWYT-Z2) ‬برای اقلیم گرم جنوب کشور ‭(Zone II)‬

This study was carried out to identify high yielding lines/cultivars in comparison to the commercial cultivars. Forty lines and cultivars including control were studied in two separate experimental, each with 20 genotypes, in five experimental field stations (Dezful, Darab, Zabol, Iranshahr and Ahwaz) in southern dry and warm zone, using randomized complete block design (RCBD) with three replications. These new lines were selected from the preliminary regional yield trials (PRWYT-Z2) of 1999 2000 cropping season. The new lines were compared with cv. Chamran, 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), Septerios 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 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 value, low SDR, greater YIR and desired agronomic characteristic: flowering time, plant height (90 110 cm), tolerance/resistance to major diseases, suitable physiological maturity period, desired grain color (Amber is preferred). Nineteen 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 2000 01 cropping season