عنوان مقاله [English]
In order to study of morphological traits of promising rice lines, a field experiment was conducted at Dashtenaz research station of agricultural and natural resource center of Mazandaran province, Iran, based on randomized complete block design with 16 promising lines with three replications during 2005. Some morphological traits such as plant height, tiller numbers and stem diameter were measured for 10 day intervals and other traits were measured at flowering stage. Results showed significant differences of studied rice lines at all morphological traits, except tiller numbers. Stem diameter had a positive significant correlation with grain yield. Plant height and stem diameter had also a positive and significant correlation with flag leaf. Number of flag leaf veins had a positive and significant correlation with stipule length, and plant height had a negative significant correlation with flag leaf chlorophyll content. Line no. 14 (IR67406-6-3-2-3) produced maximum grain yield (9983 Kg/ha) with the highest value of flag leaf chlorophyll content and stem diameter, and lowest value of plant height and peduncle length, and could be recommended as a promising line for future research programs and further agronomic practices under similar climatic conditions.