اعلانات هامة

The study was carried out in the Abi Jarash Farm in the Faculty of Agriculture, Damascus University for the field work. The research work was conducted during the growing season 2009/2010 , 2010/2011. And 10 varieties of barely were used, according to Randomized Complete Block Design (RCBD), with three replication, in order to evaluate some of the varieties for resistance lodging based on some morphological and anatomical indicators, such as stem length, stem diameter, wall thickness, length of second internode , spike length, the number of internode, plant weight.

The result showed that resistance  to lodging in the barley plant affected  by  the anatomical characteristics of the stem , especially stem diameter and wall thickness. Fourat4 was the biggest product  varieties in both of  wall thickness(41.41) micrometer and stem diameter(387.45) micrometer, then the variety Arabe abed muhasn in wall thickness(41.08) micrometer and the variety Fourat6 in stem diameter(372.65) micrometer. The results also showed the importance of stem length and  length of second internode in the identification of the  resistant varieties of the lodging,  Fourat4 was the biggest product  varieties in both of stem length and  length of second internode(83.55, 12.09)cm, respectively.

It was also noted that The observed correlation was negative and strong between spike length and both of  the stem length(r= -0.933) and the length of second internode(r= -0.899).  Also the observed correlation was negative and significant  between wall thickness  and the length of second internode (r= -0.305), and the  correlation was positive and significant  between wall thickness  and both of the plant weight (r=0.364) and the number of internode (r=0.337).

Key words: Barley, Resistance Lodging, wall thickness, length of second internode

نُفِذَت هذه الدراسة في مزرعة أبي جرش بكلية الزراعة بجامعة دمشق خلال الموسمين الزراعيين 2009 2010/ و2011/2010 م وذلك باستخدام 10 أصناف من الشعير وفقاً لتصميم القطاعات العشوائية الكاملة (RCBD) في ثلاث مكررات، بهدف تقييم بعض الأصناف من الشعير لمقاومة ظاهرة الرقاد بناءً على بعض المؤشرات المورفولوجية والتشريحية مثل: صفات طول الساق، قطر الساق، ثخانة الساق، طول السلامية الثانية، طول السنبلة، عدد السلاميات، الوزن الكلي للنبات.