Investigation of Genotype Variation of Damask Rose (Rosa damascena Mill.) in Iran Based on the Rate of Essence and some Morphologic and Physiologic Traits

Document Type : Research Article

Authors

• B. Kaviani ¹
• R. Mohammadipour ¹
• D. Hashemabadi ²
• M.H. Ansari ³
• R. Onsinejad ¹
• A.R. Berimavandi ³

¹ Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran

² Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iranch

³ Department of Agronomy and Plant Breeding, Rasht Branch, Islamic Azad University, Rasht, Iran

https://doi.org/10.22067/jhs.2022.76452.1167

Abstract

Introduction
Damask rose (Rosa damascena Mill.) is used as a multi-purpose species. The flower essential oil of this plant has many applications in various industries. There is a wide variety of morphological, phonological, flower shape, yield and yield of essential oils among genotypes and different populations of Damask rose in various ecological conditions in Iran. Evaluation of genetic diversity among Damask rose of Iran is important in order for breeding purposes. Some studies on phenotype, essential oil and genetic diversity were also carried out among different cultivars of rose flowers in other parts of the world. Significant diversity has been reported among the populations and genotypes of rose in different ecological conditions for many traits. Identifying superior species, cultivars and populations is important for commercial cultivation and more essential oil production. It is difficult to understand genetic diversity in roses because natural hybridization and spontaneous mutations with high abundance occurs in this plant. Morphological differences can be due to the geographical coordinates, natural hybridization and mutations. The purpose of this study was to investigate and compare the genetic variety of Damask rose in Guilan, Ilam, Golestan, Tehran and Kashan in order to introduce superior genotype based on essence content and some other morphological and physiological traits.
 
Materials and Methods
Five genotypes of Damask rose including Kashan, Ilam, Golestan, Tehran and Guilan genotypes were evaluated as plant materials. Plant materials were collected from mentioned-above regions as root-sucker and transferred to the farm of Research Institute of Forests and Rangelands of the country. The experimental design used was a completely randomized block, which was performed with 3 replications and was considered for each 5-suckers’ repetition (total: 75 suckers). In each replication, three specimens of each genotype were planted in pits with diameter and depth of 50-60 cm. The distance between scions per rows was 2.5 meters and row spacing from each other was 2 meters. During the experimental period, the bushes were irrigated using drip (trickle) irrigation method. The sampling was performed to measure morphological and physiological parameters after the blooms were opened in early May. Evaluated parameters were plant height, leaf length, leaf width, leaf area, petal number, stamen number, carpel number, fresh weight of petals, petal anthocyanin levels, petals essential oil levels, chlorophyll content and leaf carotenoids. Data were analyzed by ANOVA and, if significant, Tukey analysis was used. SPSS software was employed for statistical analysis.
 
Results and Discussion
The results showed that the highest amount of essential oil (0.042 and 0.038%) was extracted from the petals of Ilam and Kashan genotypes, respectively. The highest petal weight (2.70 and 2.30 g) was related to the petals of Ilam and Kashan genotypes, respectively. The highest petal length and width were obtained in these two genotypes. The largest number of petals (71.80 per each plant) was related to Guilan samples. The highest amount of chlorophyll a was related to Ilam genotype and the highest amount of chlorophyll b, carotenoids and anthocyanin was related to Kashan genotype. In the present study, rose flower genotypes collected from different parts of Iran showed significant diversity in relation to morphological and physiological properties, especially essence. The results of the present study showed that there was a significant correlation between the amount of essence in the petals and the weight and dimensions of the petals. Similar findings related to the correlation between flower yield and its components in roses flowers were presented in some studies. Some studies have shown that the weight of the flower has a very strong, positive and significant correlation with the flower yield. Despite the geographical distance between some genotypes, the high similarity coefficient between them may indicate the common origin or continuous and purposeful genotypes. On the other hand, the low similarity coefficient between genotypes proposes relatively low geographical connection and different primary origin. In the present study, there was a low correlation between the amount of essence in the petals and the weight and dimensions of the petals in the Ilam and Kashan genotypes with the Golestan and Guilan genotypes. Generative traits, including flower characteristics, are more suitable for genetic and evolutionary evaluations than vegetative traits. The results of some researchers in Iran and elsewhere in the world showed that flower yield per plant is associated with some other traits, including flower number, dimensions and weight of flowers, and the number of branches in the plant. The genetic analysis of rose flower genotypes showed that some genotypes collected from different areas are genetically relevant and some are separate. This subject shows effective role of ecological conditions in changing and variability of different species and varieties. The results indicated that the difference in the amount of essential oil compounds is mostly influenced by environmental and physiological factors.
 
Conclusion
The morphological differences observed among the flower genotypes indicate the presence of valuable germplasm and a strong potential for trait improvement. These differences also demonstrate the feasibility of selecting superior genotypes using morphological markers to enhance flower yield within the country. Overall, the Ilam and Kashan genotypes are recommended as promising candidates for use in breeding programs.
 
Acknowledgement
We thank Islamic Azad University, Rasht Branch for its assistance.
 
 
 

Keywords

• Essential oils
• Flower yield
• Genetic variation
• Rosaceae family
• Rosa damascena Mill

Main Subjects

• Medicinal Plants

©2022 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0)

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