Genetic Variation and Chemical Traits of Selected New Jojoba (Simmondsia chinensis (Link) Schneider) Genotypes

Abstract

Seeds from six selected jojoba genotypes were used in this study. Seed samples were analyzed for oil, protein, total carbohydrate, and simmondsin contents. The genetic relationships among jojoba genotypes were also determined. Highly significant differences among the genotypes were found for oil, protein, total carbohydrate and simmondsin contents. Genotype MD 8 recorded the highest oil content (54.95%), whereas genotype HD 6 had the lowest oil content (47.17%). However, the highest protein content (16.98%) and the highest carbohydrate value (33.97%) were found in genotype HB 6, which differed significantly from all the other genotypes. The significant variations in the studied characteristics observed among the genotypes might reflect, in part, their different genetic backgrounds. The inter-simple sequence repeat ISSR-derived data were evaluated to calculate the genetic similarity (ISSR-GS). The genetic similarity coefficient varied between 0.60 and 0.90. Cluster analysis was conducted to generate a dendogram to elucidate the relationships among jojoba genotypes. The dendogram generated using pooled ISSR data divided the jojoba genotypes into two main clusters. Genotypes HB8 and MD8 were found in the same sub-cluster using ISSR primers. These genotypes also had almost similar values for most chemical traits.

Response of Growth, Yield, and Phytochemical Behavior of Jojoba Genotypes to Azolla filiculoides Plant Extract

“…As a result, distinct genomic expressions were expected to be detected in the chemical parameters studied [ 35 ]. Al-Soqeer et al [ 36 ] concur that there are variances amongst jojoba plants. Our findings are consistent with those of Al-Soqeer et al [ 34 ], who assessed the development and yield of seven genotypes planted at Qassim University Farm.…”

“…For plants that were roughly five years old, the seed yield per plant ranged from 335.3 to 821.6 g plant −1 . Through an evaluation of the oil seed percentage of jojoba shrubs, Al-Soqeer et al [ 36 ] found differences between genotypes which ranged between 47.17 and 54.95%. Eltaweel et al [ 37 ] recorded that vegetative and flowering chlorophyll a and b differed according to genotype, and the seed yield ranged between 1 and 3.5 kg shrub −1 and the oil percentage of seed ranged between 49.50 and 61.17% for eight years old plants.…”

Medicinal properties of jojoba (Simmondsia chinensis)

“…Several studies were published in this regard. Of these, few demonstrated variability in the content and quality of jojoba oil, and additional compounds, such as simmondsin (will be later elaborated) content among different jojoba genotypes (Benzioni et al 2005;Al-Soqeer et al 2012). In parallel, several methods for detecting genetic polymorphism and providing genotypes with molecular fingerprinting have been published and described in more detail in (Al-Obaidi et al 2017).…”

A review on plant importance, biotechnological aspects, and cultivation challenges of jojoba plant

“…Al-Obaidi et al [ 75 ] developed a set of RAPD-PCR-based biomarkers for both in vitro and in vivo jojoba cultivars. Al-Soqeer et al [ 76 ] observed highly significant differences among six jojoba genotypes in oil, protein, total carbohydrate and simmondsin contents. They compared the molecular data obtained from ISSR markers with the chemical traits obtained from the same genotypes.…”