Essential oil yield stability of 20 populations of thyme (Thymus kotschyanus) across 11 environments of Iran
Paper Details
Essential oil yield stability of 20 populations of thyme (Thymus kotschyanus) across 11 environments of Iran
Abstract
Thyme is an important medicinal plant of Iran that in order to have Thymol and Carvacrol using as antimicrobial and antibacterial agent. The present study was carried out to determine the oil yield performances of 20 Thyme (Thymus kotschyanus) genotypes across eleven environments of Iran over 2 years (2013 and 2014). The experimental layout was randomized complete block design. Stability parameters were estimated as Eberhart-Russel stability, Lin-bin cultivar superiority, Ecovalence Wricke and Shukla stability variance analysis methods. Significant differences were observed for genotypes, Environment, and genotype × environment interaction (GE). According to Eberhart and Russel method, the high yielding genotypes 5, 56 and 70 had general stability with regression line (b =1), and thus considered adapted to all of environments. The results of Lin and Binns cultivar superiority (Pi) showed that, the genotypes of 5, 54, 56 and 50 with the lowest (Pi) values couple with higher oil yield were considered the most stable. Ecovalence (Wi) proposed by Wricke, showed that genotypes of 5, 56, 54 and 70 had lower Wi values couple with higher oil yield were considered more stable. The same genotypes in terms of Shukla stability variance also were introduced. In comparison between stability statistics, the genotypes stabilities in various methods were more and less similar. The genotypes of G5 (Ghazvin 2), G56 (Zarand) and G70 (Oromiea2) with average values of 1.66 to 1.70 Kg h-1 had higher general salability over all of environments. The genotypes G54 (Nagade) and G58 (Sanandaj2) with average values of 1.685 and 1.499 Kg h-1 had specific stability for poor environments. The genotypes G22 (Ghazvin3) and G50 (Zanjan4) with average values of 1.78 and 1.74 respectively had specific stability for rich environments.
Anonymous M. 1984. Hungarian pharamacopoeia, VII Kiadas, Kotet, Medicine Publication, Hungry 11, 111p.
Babalar M, Khoshsokhan F, Pourmeidani A. 2014. Evaluation of morphological variation and oil yields in some populations of Thymus kotschyanus. Iranian Journal of Horticultural Science 2, 119-128.
Eberhart SA, Russell W A. 1966. Stability parameters for comparing varieties. Crop Science 6, 36-40.
Finlay KW, Wilkinson GN. 1963. The analysis of adaptation in a plant breeding program. Australian Journal of Agricultural Research 14, 742-54.
Gauch Jr, Zobel RW. 1988. Predictive and postdictive success of statistical analyses of yield trials. Theoretical and Applied Genetics 76, 1-10.
Kaveh Sh, Zeinali H, Maddah Arefi H. 2013. Comparison of morphological and phytochemical traits in different populations of Thymus kotschyanus Boiss. & Hohen. with Thymus vulgaris L. genotypes. Iranian Journal of Medicinal and Aromatic Plants 29(1), 116-129.
Lin CS, Binns MR. 1988. A superiority measure of cultivar performance for cultivar x location data. Canadian Journal of Plant Science 68, 193-198.
Lin CS, Binns MR, Lefkovitch LP. 1986. Stability analysis: Where do we stand? Crop Science 26, 894-900.
Plaisted RL. 1960. A shorter method for evaluating the ability of selections to yield consistently over locations. American Potato Journal 37,166-172.
Seidler-Lozykowska J. 2008. Quality of thyme herb (Thymus vulgaris L.) from organic cultivation. Poster presented at cultivating the future based on science: 2nd conference of international society of organic agriculture research, Modena, Italy.
ShuklaG. K. 1972. Some statistical aspect of genotype-environment components of variability. Heredity 29, 237-245.
Siddiqui MH, Oad FC, Jamro GH. 2006. Emergence and nitrogen use efficiency of maize under different tillage operations and fertility levels. Asian Journal of Plant Sciences 5, 508-510.
Wricke G. 1962. Uber eine methode zur erfassung der ökologischen Streubreite in feldversuchen. Zeitschrift fur Pflanzenzüchtung 47, 92-96.
Abbas Pourmeidani, Ali Ashraf Jafari, Hasan Maddah Arefi, Sepideh Torabi, Mahdi Mirza, 2015. Essential oil yield stability of 20 populations of thyme (Thymus kotschyanus) across 11 environments of Iran. J. Biodiv. Environ. Sci., 7(1), 31-37.
Copyright © 2015 by the Authors. This article is an open access article and distributed under the terms and conditions of the Creative Commons Attribution 4.0 (CC BY 4.0) license.