Mohamed Nael Khattab*(1) Waseem Adla(2) and Erwa Suleiman(1)
(1). Crops Department, Faculty of Agriculture, Tishreen University, Lattakia, Syria.
(2). Al-Ghab Agricultural Scientific Research Center. General Commission for Scientific Agricultural Research GCSAR, Damascus, Syria.
(*Corresponding author: Dr. Mohamed Nael Khattab. E-Mail: aboalabd876@gmail.com).
Received: 03/01/2019 Accepted: 20/02/2019
Abstract
The research was carried out with the aim of estimating some genetic indicators of growth and productivity characteristics to determine the important trait or traits in the selection to be used in breeding programs, for five varieties of sunflower Helianthus annus L. (variety 90, variety 19, variety 9, local variety, and variety 54), which were received from the General Commission for Scientific Agricultural Research (GCSAR), and were planted in three densities (44000, 55000, and 74000 plants/ha), according to randomized completely block design arranged in split-plot with three replicates. The varieties were distributed in the main plots, while the plant densities were allocated in the secondary plots in AL-Gab region (Hama) during season 2018. The results revealed that there were genotypic and phenotypic homogeneity, according to the lowest genetic variance coefficient (GCV) and phenotypic variance coefficient (PCV) for most of the studied traits. Genetic variability was the largest percentage of phenotypic variation. The broad sense heritability values ranged from 83% to 96%, especially at the density of 74000 plants/ha of some traits and reflected on genetic progress which was high and ranged between 14-30%. The results also showed that the best variety that can be evaluated for several years and in more than one geographic location was (variety 9), if planted in a density of 44000 plants/ha to get high productivity components. The characteristics of number of days until flowering, maturity, plant length and productivity kg/ha are better on density of 74000 plants/ha. It is concluded that number of seeds per head and seeds weight can be used as selection indices.
Keywords: Sunflower, Densities, Genetic indicators.
Full Paper in Arabic: PDF