Nabeel Awad Hassan(1) Maysoun Saleh*(2) and Nader Ibraheem Alkaraki(1)
(1). Izraa Research Station, Agricultural Research Center in Daraa, General Commission for Scientific Agricultural Research (GCSAR), Daraa, Syria.
(2). Genetic Resources Department, GCSAR, Damascus, Syria.
(*Corresponding author: Dr. Maysoun Saleh. E-Mail: mzainsamasaleh@gmail.com).
Received: 15/06/ 2015 Accepted: 24/07/ 2015
Abstract
The study was conducted at Izraa Research Station, General Commission for Scientific Agricultural Research (GCSAR), Syria, during 2012/2013 season. Eight genotypes (3genotypes belongs to the species Triticum. carthlicum, 2 genotypes belongs to the species Triticum. polonicum , 3genotypes belongs to the species Triticum. dicoccum, and tow local checks sham3 and sham5, which were planted in Randomized Complete Block Design RCBD with three replications. Correlations and path coefficient analysis between yield components (number of total and fertile tillers, number and weight of grains per spike, thousand grain weight, individual plant yield) were studied. Results showed that grain yield had a positive significant correlation with both of number of total and fertile tillers (0.849**,0.932**) respectively, but number of total tillers had a positive significant correlation with number of fertile tillers (0.926**), while negative significant correlation was noticed with the number of grains per spike. The correlation was positive and significant between weight of grains per spike and with both of number of grains per spike and thousand grain weight. The results of path coefficient analysis showed that the indirect effect of number of total tillers on grain yield through the fertile tillers was positive and high (0.850), and was very close to the direct effect of the number of fertile tillers on grain yield (0.918), and the direct effect of grain weight per spike on grain yield was positive (0.322), and it’s indirect effect was negative and medium through the number of fertile tillers, and the indirect effect of thousand grain weight on grain yield was positive and medium through the weight of grain per spike (0.213). This study recommends to pay attention to the number of fertile tillers and grain weight per spike as a selection index of grain yield in the breeding programs, because of their high correlations an direct effect on yield.
Key Words: Wheat, Yield components, Correlation coefficient, Path coefficient analysis.
Full paper in Arabic: دراسة الارتباط وتحليل المسار بين مكونات الغلة لدى بعض الطرز من القمح