مطالعه ارتباط انتقال مجدد ماده خشک ساقه با عملکرد و اجرای عملکرد دانه (تعداد دانه و وزن هزار دانه) ارقام وژنوتیپ های زراعی گندم ایران در شرایط تنش رطوبتی

The aim of this research was to study the relationship between grain yield and dry matter remobilization in different parts of wheat stem in water stress condition. Thirty six genotypes were studied using a simple lattice design with three replications under both irrigated and drought conditions in the growing season of 2011 to 2012 at the Agricultural Research Station of Tehran University (Karaj). Water stress was imposed at the beginning of anthesiss and continued until physiological maturity. The main stem was harvested at physiological maturity under both irrigated and water stress conditions. There was no significant relationship between stem dry matter remobilization and grain yield in water condition. However it was significant and positive in the stress condition. Also a Significant positive relationship between seed weight and remobilization of stem reserves in both irrigated and water stress conditions was observed. The correlation between remobilization and grain number was different in irrigated and water stress conditions. Under both irrigated and water stress condition indicate that there are useful genetic materials among the Iranian wheat cultivars and genotype that could be used to improve these two important adaptive traits in wheat breading programs.