The Phenotypic Characterization of Some Damask Rose (Rosa ‎damascena Mill.) Genotypes Distributed in Latakia ‎Government

Tharwat Saleem Redwan*(1) Hafez Mohammed Mahfouz(1) and Mazen Ali Nassour(2)

(1). Scientific Agricultural Research Center of Lattakia, General Commission for Scientific

Agricultural Research (GCSAR), Damascus, Syria.

(2). Department of Horticulture, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(*Corresponding author: Eng. Tharwat Saleem  Redwan. E-Mail: tharwat.redwan@yahoo.com) .

Received: 12/12/2018                               Accepted: 08/04/2019

Abstract

This research aimed to study the morphological characterization and to determine the  variability among twenty Rosa damascene genotypes, which grown in different areas of  Latakia and  compare them with two genotypes from Marah location at the countryside of Damascus to  take advantage of high quality characteristics  in order to be improved in the future, and  to enhance its cultivation. The results of morphological characterization  of forty traits showed a clear difference between some studied genotypes. The highest differences were related to flowers and vegetative characters compared with fruits and seeds characters.  A dendrogram based on the morphological data showed clear separation between studied genotypes, and reached (85%) for flowers characters and reached (60%) for vegetative characters, while it attained (47%)  for  fruits and seeds characters. The study showed that there were a distinct differences for some genotypes which can be used in breeding and genetic improvement programs in the future.
 Key words: Genotypes,  Rosa damascena,  Morphological characterization, Syria.
Full paper in Arabic: PDF

The Effect of IBA (Indol-3-Butyric Acid) Treatment on ‎Rooting of Some Damask Rose (Rosa damascena Mill.) ‎Rootstock Genotypes

Tharwat Salim Khaddour*(1) Hafiz Mohammad Mahfouz(1) and Mazen Ali Nassour(2)

(1). Scientific Agricultural Research Center of Lattakia, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.

(2). Department of Horticulture, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(*Corresponding author: Eng. Tharwat Saleem Redwan. E-Mail: tharwat.redwan@yahoo.com). 

Received: 26/06/2019                               Accepted: 27/09/2019

Abstract

This study was conducted at glasshouse of ACSAD  nursery in Lattakia, during (2018 and 2019) using four genotypes of Rosa damascene (RD1, RD2, RD3 and RD4) treated with three different concentrations of IBA i.e.500, 1000 and 2000 ppm in addition to the control treatment 0 ppm, in order to determine the best concentration of IBA. The experimental design was randomized complete block design with two factors in four replicates. The results indicated that the use of  IBA encouraged the rooting at different rates according to the genotype and the concentration of IBA. Treatments (1000 and 2000) ppm were significantly higher than the other treatments in rooting rate (%(89.8- 88.27 respectively. The response of the rootstocks to IBA differed according to the studied genotypes. Genotypes RD1 and RD2 were superior when treated with 2000 ppm concentration in root percentage (90.2- 90.3)%, callus creation (80- 81)%, root number (8 and 8.1) and root length (5.41 and 5.4) cm respectively.

Keywords: Rosa damascena, Propagation, rootstock, Auxin IBA, Genotypes.

Full paper in Arabic: PDF