Saleh Saleh*1, M. Shafik Hakim1, and Abdullah Al-Yousef2
1Dept. of Field Crops, Faculty of Agricultural Engineering, University of Aleppo, Aleppo,Syria.
2 Aleppo Center of Scientific Agriculture Research, Aleppo, Syria.
(*Corresponding author: Saleh Saleh,Email: salehalsaleh989@gmail.com,Mob. 0938386194.)
Received: 2/ 06/ 2025 Accepted: 5/ 07/ 2025
Abstract
The study was conducted at the Hmeimeh Research Station, affiliated with the Agricultural Scientific Research Center in Aleppo, over two growing seasons (2019/2020 and 2020/2021). Four barley single-cross hybrids and their parental lines were sown in three rows each on December 11, 2019, with the aim of producing seeds of the parental genotypes and obtaining F2 generation seeds. Backcrosses were also performed between F1 plants and their parents (BC1 with the first parent and BC2 with the second parent). Each row was 3 meters long, with a spacing of 30 cm between rows. In the second season, the parental lines and the plant populations (F1, F2, BC1, and BC2) of each of the four single-cross hybrids were sown on December 9, 2020, using a randomized complete block design (RCBD) to estimate correlation coefficients, path coefficients, and the relative importance of traits contributing to yield in the populations of the following four barley hybrids: (Arabi Aswad × Furat 3), (Arizona × Alanda-01), (Arabi Abyad × Avit), and(Rihan-03×Alanda-01). Grain yield showed a positive and significant phenotypic correlation with the number of productive tillers per plant(r=0.27), grain weight per spike(r =0.72), and number of grains per spike(r=0.81). Genotypic ally, it was positively and significantly correlated with the number of grains per spike(r=1) and grain weight per spike (r =1). Among the studied traits, the number of grains per spike (9.6380 had the highest direct positive contribution to yield, followed by the number of productive tillers per plant (4.452), which contributed indirectly through grain weight per spike (8.255) and thousand grain weight (1.543) in the four studied hybrids.
Keywords: Barley, Correlation Coefficient, Path Analysis, Dry Conditions, Relative Importance.
Full paper in Arabic: pdf