الفهرس | Only 14 pages are availabe for public view |
Abstract Wheat is considered one of the most important cereal crops m Egypt and in most of the world countries. The annual production of wheat in Egypt is estimated by approx. 4.6 million ton. The total acarage grown to wheat (Ca. 2.1 million Faddan.) during 1993/1994. The balance amount (Ca. 5.4 million ton) is imported therefore from the principale wheat producing countries. Imported amounts are subject to progressive annual rise to meet the rapid increase in population. Wheat is attacked with many diseases in Egypt, i.e. rusts, smuts, barley yellow dwarf (BYD) Powdry mildew and other diseases of minor importance. Most of the new released wheat cvs. are considered to be resistant to loose smut. However an infection with the disease has been recorded during 1984/85 on the two wheat commercials i.e Sakha 61 and Salcha 69 and thereafter, on the wheat cv. Giza 163. Consequently, it was necessary to study that disease in Egypt, since the available references lacked to such study. The present study aimed at identifying the physiological races of the pathogen in Egypt. Histological studies were carried out aiming at following up and detecting the smut mycelium in the tested embr)ros and seedlings. Inheritance of resistance to loose smut was one of the main objective of this study for its importance in selection and breeding of wheat against the pathogen in certain local wheat cvs. Some physiological changes associated with the disease i.e. enzymatic activity (Peroxidase l!i |