Ghrood Al-Aswd(1)* Taha Ahmad Al-Arefi (2) Ibtisam AbdulAziz Al-Abed (2) Thamer AL Hniesh(1) and Mhmoud Sedo(3)
(1). Depart. of field crops Res. GCSAR, Damascus, Syria.
(2). Hama Research center, GCSAR, Syria.
(3). Homs, GCSAR, Syria.
(*corresponding author: Ghrood Al-Aswd. E- Mail : ghroodaswd@yahoo.com).
Received: 24/09/2022 Accepted: 24/11/2022
Abstract:
A field experiment was carried out in Homs and Hama research centers, under irrigated conditions during the 2018-2019 growing seasons, in order to evaluate 7 genotypes of soybean. The experiment was laid in a randomized complete block design with three replications. traits of(number of days until flowering, number of branches, plant height, height of the first pod, number of pods/plant, weight of 100 seeds, seed yield) were studied. Principle component analysis was carried out in order to portioning the total variance into principal components. Correlation analysis and path coefficient analysis between studied traits and seed yield were applied to obtain direct and indirect effects and to define their contribution (%) in seed yield to identify the selection criteria for seed yield. The results showed that seed yield had a significant positive correlation between number of pods/plant and weight of 100 seeds (0.689**, 0.805**) respectively. Principle component analysis results indicated that there are two components (PC1, PC2) explain79.8% of the variance between the studied genotypes. Results of path coefficient analysis showed that the direct effects of number of pods/plant, the number of branches and the number of days until flowering were positive andstatistically significant (2.827, 2.755, 1.727) respectively. The overall contribution of the studied traits in seed yield 38.32%, In summary, using these traits especially (number of pods/plant and the weight of 100 seeds) as selection criteria is preferred direction when breeding for high yield potential.
Key Words: Principal Component, Correlation, Path coefficient, seed yield, soybean.
Full paper in Arabic: pdf