Comparison of Stability Parameters for Detection of Stable and High Essential Oil Yielding Landraces of Rosa damascena Mill.
محورهای موضوعی : مجله گیاهان زینتی
Bayzid Yousefi
1
(Associate professor, Research Division of Natural Resources, Kurdistan Agricultural and Natural Resources Research and Education Center, AREEO, Sanandaj, Iran.)
Sayed Reza Tabaei Aghdaei
2
(Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran)
کلید واژه: Adaptation, Essential oil, <i>Rosa damascena</i> Mill, Stability parameter,
چکیده مقاله :
The essential oil yield stability of damask rose (Rosa damascena Mill.) as an important medicinal and aromatic plant in different environments has not been well documented. In order to determine appropriate stability parameters, six statistics were studied for essential oil stability of 35 Rosa damascena landraces in seven locations (Sanandaj, Arak, Kashan, Dezful, Stahban, Kerman, and Mashhad) and two years (2007-2008) in Iran, using a randomized complete blocks design with three replications. Significant differences (P<0.01) were observed in essential oil ratio among landraces (G), locations (L), and environments (E) and in landrace × location (GL) and landrace × environment (GE) interactions. The positive correlation of environmental variance (S2), coefficient of variation (CV), and regression coefficient of yield over environments (b) with essential oil suggest that only low-yield landraces develop a similar phenotype over a range of environments and show static stability. Although there were not any stable landraces by b (b ≈ 0) and all of the stable ones by S2 produced very low yields, some of the adaptable ones by CV (e.g. KM1) showed high essential oil ratios and stability simultaneously. The stable landraces according to the dynamic stability concept (b ≈ 1, Sd2 or variance due to deviation from regression ≈ 0) produced moderate essential oil. Superiority index (P) determined some of the highest essential oil as adaptable landraces. The stable landraces with the least variance of the years within places (MSY/P) produced the least essential oil. It could be concluded that a genotype can demonstrates both static and dynamic stability with high essential oil content. In addition, CV, dynamic view statistics (b ≈ 1, Sd2≈ 0), and P are proposed as desirable parameters for the evaluation of essential oil stability with different concepts in damask rose genotypes.
پایداری تولید اسانس گل در ژنوتیپ­های گل محمدی به­عنوان یکی از مهمترین گیاهان دارویی و معطر ایران، هنوز کاملا بررسی و مستند نشده است. به­منظور مقایسه آماره­های تشخیص پایداری عملکرد اسانس، شش آماره متفاوت برای 35 ژنوتیپ گل محمدی (Rosa damascena) کشور، کاشت شده به­صورت طرح بلوک­های کامل تصادفی با سه تکرار در هفت استان (کردستان، مرکزی، اصفهان، خوزستان، فارس، کرمان و خراسان) و دو سال (2007 و 2008) ارزیابی شد. اختلاف معنی­داری (01/0P<) از لحاظ بازده اسانس بین ژنوتیپ­ها (G)، مکان­ها (L)، محیط­ها (E) و نیز برای اثرات متقابل ژنوتیپ × مکان (GL) و ژنوتیپ× محیط (GE) مشاهده شد. همبستگی مثبت بین واریانس محیطی (S2)، ضریب تغییرات (CV) و ضریب رگرسیون عملکرد بر محیط (b) با بازده اسانس دلالت داشت که فقط ژنوتیپ­های با اسانس پایین فنوتیپ مشابهی را در محیط­های مختلف دارند که این همان پایداری استاتیکاست. ژنوتیپ پایداری با مفهوم استاتیک رگرسیون(b ≈ 0) وجود نداشت و ژنوتیپ­های پایدار (Stable) با S2 هم اسانس بسیار اندکی داشتند، اما برخی ژنوتیپ­های سازگار با CV (مانند KM1) همزمان عملکرد بالا و پایداری­ عملکرد داشتند. ژنوتیپ­های پایدار با مفهوم دینامیک (b ≈ 1 و 0≈Sd2 واریانس انحرافات از خط رگرسیون برابر صفر) عملکرد اسانس متوسطی داشتند. شاخص برتری(P) ژنوتیپ­های با بالاترین اسانس را به­عنوان سازگار معرفی نمود. ژنوتیپ­های پایدار با کمترین واریانس سال در مکان (MSY/P)، حداقل اسانس را تولید کردند. می­توان نتیجه گرفت که ژنوتیپ گل محمدی می­تواند همزمان دارای پایداری استاتیک، دینامیک و عملکرد اسانس بالا باشد. در مجموع آماره ضریب تغییرات (CV)، جنبه دینامیک آماره­های رگرسیون (b ≈ 1, Sd2≈ 0) و شاخص برتری (P) به­عنوان پارامترهای مطلوب برای ارزیابی جنبه های مختلف (استاتیک و دینامیک) پایداری اسانس در گل­محمدی پیشنهاد می­شوند.
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