نقش آبیاری تکمیلی و تیمار محدودیت منبع بر بهبود روند انتقال مجدد ماده خشک از ساقه به دانههای در حال رشد در ژنوتیپ های جدید گندم نان

The aim of this study was to investigate the contribution of dry matter remobilization in grain filling and identify cultivars that show a better response to supplementary irrigation in dry land research station of Sararood on 2012-2013 crop ping cycle.An experiment was carried out as factorial based on Completed Randomised Block Design with three replications was used. Two factors included that, four places and source restriction treatment (dry land farming, dryland farming + source limitation, supplementary irrigation and supplementary irrigation + source restriction) and five wheat cultivars (Rijaw, Karim,Cross of sabalan, Cross of Alborz and Sardari). Sourcerestriction treatment was applied with using chemicals, 14 days after pollination. Based on analysis of variance, significant differences were seen between places, cultivars and interaction between place and cultivar. The highest carbohydrate remobilization and efficiency of remobilization was seen in supplementary irrigation + source restriction treatment. In supplementary irrigation treatment the highest dry mater was seen. These results showed that supplementary irrigation caused more dry matter storage in stems before anthesis. This is suitable for remobilization of dry mater from stem to growing grains under water stress. Highest average efficiency and contribution of remobilization was belonged to Cross- sabalan While Cross of Alborz genotype accounted for the highest yield