Application of Mutagenic Radiation and Research the Optimal doses of Induction of bud break and Vegetative Growth in the Grapevine (Vitis vinifera (L.)

The demand of grape in Morocco is fulfilled through import from foreign countries. The fruits of local cultivars of grapes offer a low yield. Development of seedless grape varieties having increased sweetness, higher yield with better nutritional quality is necessary to reduce the import dependency. The present research activities are the part of a grape improvement project. A pot experiment was conducted at the National Institute of Agronomic Research (INRA), Center Tangier (Morocco), during February to November 2017 to determine the suitable gamma irradiation doses on growth, leaf area and content of chlorophyll of grape seedling. One hundred vegetative bud cutting and three doses of gamma irradiation 20, 30, and 40 Gy were used as treatment. Different irradiation doses and vegetative cutting showed significant variations in respect of plant growth characters, leaf area and Chlorophyll Content. Higher doses of gamma irradiation had showed detrimental effect on grape saplings. Generally, increased in irradiation doses showed decreased and detrimental effects on most of the parameters under study. Maximum numbers of growing bud, leaf area and content of chlorophyll were found at 20 Gy irradiation dose. All parameters showed best results in 20 Gy with bud cutting initiation.