الفهرس | Only 14 pages are availabe for public view |
Abstract Our work was carried out to control the problems of traditional propagation of jojoba where traditional procedures using seeds and semi-hardwood cuttings resulted in several difficulties. When the plantation is established by seeds, male plants outnumber the females. In addition, shrubs obtained from seeds showed a high variability in most traits including yield because it is dioecious and obligate cross-pollinated plant species. Since, seed germination decreased with time after seed harvesting, seed germination under the influence of several conditions was studied in this work. Vegetative propagation can be established using semi-hardwood cuttings and growth regulators. However, the maximum number of possible obtained propagules was limited by plant size and time of year. These factors were completely avoided when tissue culture techniques were used where one nodal explant of elite shrub could be used and multiply to obtains great numbers of propagules at any time of the year. The ability of jojoba seeds to germinate and grow in sandy soil, at 30°C and under relatively low concentration of NaCl, mannitol (2 – 3 g/ l), or lead acetate gave clear indication about suitability of jojoba shrub to cultivate commercially in large areas of desert lands in Egypt and Arab countries. In this work, a tissue culture technique was used for jojoba micropropagation and genetic improvement through. |