effect of cuttings type and position on the vegetative propagation of yew (taxus baccata)

common yew (taxus baccata) is one of the native and extinguishing speices at northern forests of iran that is very important as a genetic reserve and, therefore, more studies are necessary for preservation and restoration of this rare forest speices. for having high value and complete preservation of gene structure, vegetative propagation is one of the suitable in use methods in this field. this research was carried out in order to achieve the most suitable direction, height and type of cutting from yew crown. so, cuttings were collected from four main directions and two height of crown and planted in greenhouse conditions by heel and injured types as a factorial in randomized complete design. data were analyzed with f test and duncan multiple comparisons. data variance analysis showed significant difference in 5 percentage error level in growth amount, new shoots and dried cuttings number. evaluation of intercept effects was significant only for growth amount and number of new shoots. based on the achieved data from this research, the highest growth of new shoots and growth amount belonged to cuttings of east direction, top height and injured type. also, heel type cuttings from north direction and top crown height had the highest drying amount.