科研之友
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摘要
In this study, 40 genotypes of the genus Stachys were collected from the three locations of Damaneh, Shahrekord, and Semirom in central Iran. Essential oil content and morphological characteristics were studied over two consecutive years in a randomized complete block design (RCBD). Result of analysis of variance revealed significant differences among most of the morphological traits studied and the essential oil content in terms of genotype, cultivation year, and genotype x year interaction. Coefficients of genotypic variation revealed a high diversity in both essential oil content and days to flowering, suggesting the possibility for improving essential oil by means of selection particularly in the first year. The essential oil content of the genotypes examined ranged from 0.087% to 3.15% in the first year and 0.095% to 1.16% in the second year. Based on the two-year evaluation conducted, eight genotypes with high essential oil yields were selected from the three sampling locations to determine their essential oil compounds. GC-MS analysis revealed Z-chrysanthenyl acetate (30.34%-63.73%), linalool (0.6%-10.82%), caryophyllene oxide (4.04%-12.91%), spathulenol (0.98%-4.53%), viridiflorol (0.36%-11.49%) and trans-caryophyllene (3.39%-11.95%) to be the major components. The highest positive and negative correlations were obtained between a-terpineol with linalool (0.96) and caryophyllene oxide (-0.78), respectively. Finally, Damaneh8 and Shahrekord6 were introduced as genotypes with high essential oil yields and high Z-chrysanthenyl acetate content. In conclusion, many of the studied traits showed improvements in the second year although the genetic variation was lower in comparison with the first year.
- 出版日期2018-2
