Selection of genotypes of jojoba shrubs (Simmondsia chinesis, (Link) Schneider) which grown in Wadi El-Natroun region, Egypt

Abstract

This investigation was conducted on a private orchard in the WadiEl-Natrun region during the two consecutive seasons 2020-2021, choosing numerous genotypes of farmed jojoba shrubs were about 10 years old that flourish in this region. They stand out from other shrubs due to their superior vegetative growth and yield. The numbers assigned to the investigated genotypes ranged from genotype 1 to genotype 15. For all tested genotypes, irrigation, fertilization, service operations, and environmental factors were the same. A comparison was made between all tested genotypes in terms of vegetative growth (shrub height, No. of new shoots, length of new shoots, No. of leaves/branch, No. of nods/branch, length of internodes, length of internodes, leaf length, leaf chlorophyll content), fruit characteristics (fruit length, fruit width), fruit set percentage and yield (No. of flowers/shrub, No. of fruits/shrub, fruit set percentage, fruit weight). Genotype 9 was shown to have the best vegetative traits in terms of shrub height, lengths of new shoots, number of nodes/branch, number of leaves/branch and lengths of internodes.As well as number of both flowers and fruits /shrub, fruit width and the average yield of the tree. In order to extend the cultivation of genotype No. 9, efforts were made to collect cuttings from it and duplicate it. In that area, Genotype 9 was genetically investigated, and a genetic fingerprint was developed to understand more about it.