Sara Tajdoost,; Ramezan Ali Khavari-Nejad; Fariba Meighani,; Eskandar Zand; Zahra Noormohammadi
Volume 9, Issue 4 , July 2012
Abstract
The genetic diversity of 17 Cuscuta campestris ecotypes collected from different regions of Iran was assessed using ISSR and protein markers. Ten ISSR primers generated a total of 361 bands, of which 347 bands were polymorphic. PIC (polymorphism information content), based on ISSR and protein data, averaged ...
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The genetic diversity of 17 Cuscuta campestris ecotypes collected from different regions of Iran was assessed using ISSR and protein markers. Ten ISSR primers generated a total of 361 bands, of which 347 bands were polymorphic. PIC (polymorphism information content), based on ISSR and protein data, averaged 0.66 and 0.4 per primer, respectively. Cluster analysis and PCA plots derived from Dice’s similarity coefficientof the two-marker systems were highly concordant. The analysis of molecular variance allowed us to partition variation into: 81% (variance among populations) and 19% (variance within populations) based on ISSR data; and 85% (variance among populations) and 15% (within populations) for protein data. This high variation among ecotypes could be due to the high self fertilization, limited gene flow or the low rate of pollen and seed migration among ecotypes. Knowledge of the genetic variability of the weed acquired through using different molecular tools can be helpful in developing management programs in order to effective control of the weed in crop fields.
Mohammad Reza Labbafi; Assadollah Hejazi; Fariba Meighani; Hamideh Khalaj; Mohammad Ali Baghestani
Volume 5, Issue 3 , April 2008
Abstract
The 'equal compartment-agar method' was used to evaluate the allelopathic potential of wheat (Triticum aestivum) cultivars on the seedling growth of field bindweed (Convolvulus arvensis) and rye (Secale cereale). The experiment was carried out during 2005 at the Weed Research Department of the Iranian ...
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The 'equal compartment-agar method' was used to evaluate the allelopathic potential of wheat (Triticum aestivum) cultivars on the seedling growth of field bindweed (Convolvulus arvensis) and rye (Secale cereale). The experiment was carried out during 2005 at the Weed Research Department of the Iranian Crop Protection Research Institute, in a factorial form on a completely randomized design with three replications. Wheat cultivars in four levels (Shiraz and Niknejad, as more competitive cultivars; Tabasi and Roshan, as less competitive cultivars) and the density of wheat seedlings on four levels − 0 (control), 8, 16 and 24 − were considered as factors. Mean comparison showed that higher seedling density (at 24) had the greatest effect on decreasing rye growth (seedling, radicle, and hypocotyl) and all of the wheat cultivars showed a decrease in seedling, radicle and hypocotyl length in comparison with the control. All the wheat cultivars, especially at the highest density, decreased seedling and radicle length, but increased the hypocotyl length of field bindweed.
