Variability in Seed Characteristics of Unselected and Selected Jojoba Populations

Naqvi, Himayat H.; Matsumura, Mitsuo; Ting, Irwin P.

doi:10.21273/hortsci.25.3.364

Cited by 6 publications

(7 citation statements)

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“…6. Similar results were obtained by Naqvi et al (1990) who indicated that the seed length in the unselected population ranged between 10.0 and 20.3 mm, while in the selected population it varied from 13.4 to 21.1 mm.…”

Section: Ii-seed Characteristics : 1-seed Lengthsupporting

confidence: 86%

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STUDIES ON SOME MORPHOLOGICAL ASPECTS OF JOJOBA [Simmondsia chinensis (LINK) SCHNEIDER] UNDER EGYPTION CONDITIONS.

El-Baz

El-Dengawy

El-Shahat

et al. 2009

Journal of Plant Production

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Jojoba [Simmondsia chinensis (Link) Schneider] is a long-lived desert shrub, native to the arid zones of Arizona, California and NorthWestern Mexico. The unique wax in their seeds could be a substitute for the oil of the endangered sperm whale. The plant in its natural habitat tolerates high temperature , soil salinity , soil alkalinity and may classified as a true xerophyte. Jojoba shrubs has been introduced to Egypt in 1991 and first orchard planted at EL-Ismailia district on nearly 20 feddans by seeds from USA. The total cultivated area of jojoba has reached over 762 feddans that produce 180 tons of seeds according to IJEC (2008). The study was conducted during seasons of 2006 and 2007 to investigate the variations among different genotypes established by seeds at El-Ismailia to define the extent of differences among them and try to use the morphological parameters obtained in the field for evaluation and propagation of the desirable genotypes. A total of 24 Jojoba genotypes, among them eleven being considered as commercial genotypes are being morphologically studied. Considerable variability was found among the genotypes in all parameters, i.e. height and volume of shrubs , shoot length , internode length and thickness , number of internodes , number of leaves , average of leaf surface area , leaf area/1m of vegetative growth , shape index of leaf , node density per shoot , flowers density per shoot , seed length and width , weight of 100 seeds in addition to shape index of seed. The natural degree of variability appeared enormous, that gives a plant scientist a huge range of possible gene combinations for future selection and improvement of jojoba as a new-industrial and commercial crop.

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Section: Ii-seed Characteristics : 1-seed Lengthsupporting

confidence: 86%

“…These results are supported by the findings of Naqvi et al (1990) who found that the seed width in the unselected population ranged between 8.1 and 12.4 mm, while in the selected population it varied from 9.0 to 13.3 mm. They also reported that seed weight was positively and significantly correlated with seed length and seed width.…”

Section: -Seed Widthsupporting

confidence: 85%

STUDIES ON SOME MORPHOLOGICAL ASPECTS OF JOJOBA [Simmondsia chinensis (LINK) SCHNEIDER] UNDER EGYPTION CONDITIONS.

El-Baz

El-Dengawy

El-Shahat

et al. 2009

Journal of Plant Production

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“…6. Moreover, Naqvi et al (1990) indicated that the seed length in the unselected population ranged between 10.0 and 20.3 mm, while in the selected population it varied from 13.4 to 21.1 mm.…”

Section: Fruit Length (Cm)mentioning

confidence: 98%

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

Farag¹,

Abdelwahed²

2022

Journal of Agricultural and Environmental Sciences

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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.

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“…Many authors found significant variability in different morphological and traits of productive characteristics such as leaf shape and area, seed size and weight and wax content per seed ( Naqvi et al, 1990 andGaber et al, 2007). Jojoba plants were growing in sandy, coarse and even gravelly soils that have good water drainage (National Research Council 1985 andWeiss, 2000).…”

Section: Introductionmentioning

confidence: 99%

EVALUATION OF SOME FEMALE JOJOBA" Simmondsia chinensis LINK" SHRUBS UNDER SOUTH EL-TAHRIR REGION CONDITIONS

Shaheen¹,

Aly²,

Eassa³

2010

Journal of Plant Production

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The present study was carried out on 32 female Jojoba" simmondsia chinensis-Link" shrubs were about 12 years old during 2007 & 2008 experimental seasons. The shrubs have been grown at the Experimental Orchard of Ali Moubark, south El-Tahrir, El-Behira Governorate, Egypt. The shrubs growing in sandy soil in two lines a & b at distance of 5 X 5 meter apart and irrigated with drip irrigation system. The present study was aimed to select the best shrubs on yield and a considerable amount of seeds contained higher oil, as well as propagated the selected shrubs using soft stem cutting to study their rooting ability. The morphological characteristics of jojoba shrubs (vegetative growth characters, flowering, and fruiting), yield as well as seed physical and chemical proprieties were stimated in this study.The results showed that the growth vigor of shrubs varied to be strong, moderate and weak while most of shrubs were a drooping in habit growth. Shrub No.8 b had the highest shrubs height, seed length, width and weight, while shrub No.22a had the highest value of circumference and shrub No. 6a had the highest number of leaves/ meter, leaf area and leaf L/W ratio, number of flowers and fruits per meters in both seasons. Shrubs No.15a, 8b had the highest leaf area and leaf L/W ratio, along with their, yield was differed from first and second seasons. Shrub No.6a was a superior in both seasons with seeds yield of 3.250 kg in the first season and 3.133 kg in the second season.The highest number of ridges was observed in shrub No.2b, number of grooves were varied from 2 to 3 grooves and the highest seed oil content was in shrub No.13b with the percentage of 60.70% and 61.09% in the first and second seasons. Concerning vegetative propagation of the best jojoba shrubs in yield and seed oil content (No. 6a, 2b, 8b, 13b, 14b), data showed that shrub No. 6a had the highest percentage of rooting cutting, length of root and fresh weight of roots, while shrub No. 13b had the highest number of roots per rooting cutting and shrub No. 14b had the highest dry weight of roots.The natural degree of variability appeared enormous, that gives a plant scientist a huge range of possible gene combinations for future selection and improvement of jojoba as a new-industrial and commercial crop.

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Variability in Seed Characteristics of Unselected and Selected Jojoba Populations

Cited by 6 publications

References 0 publications

STUDIES ON SOME MORPHOLOGICAL ASPECTS OF JOJOBA [Simmondsia chinensis (LINK) SCHNEIDER] UNDER EGYPTION CONDITIONS.

STUDIES ON SOME MORPHOLOGICAL ASPECTS OF JOJOBA [Simmondsia chinensis (LINK) SCHNEIDER] UNDER EGYPTION CONDITIONS.

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

EVALUATION OF SOME FEMALE JOJOBA" Simmondsia chinensis LINK" SHRUBS UNDER SOUTH EL-TAHRIR REGION CONDITIONS

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