Preliminary date palm cultivar composition of Moroccan palm groves as revealed by leaf isoenzyme phenotypes

Bendiab, K.; Baaziz, M.; Majourhat, Khalid

doi:10.1016/s0305-1978(97)00078-1

Cited by 21 publications

(11 citation statements)

References 3 publications

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“…However, they provide limited number of informative markers and give no direct assessment of the genomic variation. By using polymorphic isoenzyme markers, Bendiab et al (1998) studied genetic diversity of the Moroccan palm groves and estimated variability more than 90% of total diversity of the date palm within-populations, whereas variability between the populations is limited to about 10%. In this regard, a study to assess levels of alloenzym diversity in collection of 29 date palm cultivars belonging to three main date-growing regions in Tunisia was conducted by Salem et al (2001).…”

Section: Biochemical and Molecular Characterizationmentioning

confidence: 99%

In Vitro Conservation of Date Palm Germplasm

Bekheet

2011

Date Palm Biotechnology

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Date palm (Phoenix dactylifera L.) germplasm is difficult to conserve and store in the form of offshoots or in field collections. Tissue culture technologies have had a major impact on the ex situ conservation of plant genetic resources. In vitro culture techniques supplement date palm conservation efforts and have been applied to germplasm collection, preservation and rapid clonal multiplication. In vitro storage methods have been developed for preservation of date palm germplasm and can be used efficiently for international exchange of germplasm because of their obvious advantages over in vivo material. Preservation of plant cells, meristems and somatic embryos has become an important tool for long-term storage of germplasm utilizing minimum space and low maintenance. Short-and mid-term storage is achieved by controlling environmental growth conditions and nutrient media composition. Long-term storage has been reported for in vitro cryopreservation of date palm cultures. Encapsulation of plant material in alginate beads has been suggested recently as a possible means of date palm germplasm exchange. Knowledge about germplasm diversity and genetic relationships are highly valuable tools in plant conservation strategies. In this regard, a number of molecular biology methods are currently available for analysis of genetic diversity in date palm genotypes. This chapter discusses the general issues and different aspects of plant biotechnology used for management and conservation of date palm cultivars.

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Section: Biochemical and Molecular Characterizationmentioning

confidence: 99%

In Vitro Conservation of Date Palm Germplasm

Bekheet

2011

Date Palm Biotechnology

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“…They have also been used successfully to characterise and differentiate close by related species, ecological varieties or natural and artificial hybrids (Rieseberg et al, 1989;Booij et al, 1995;Bendiab et al, 1998;Elisiário et al, 1999). Therefore, they could provide valuable insights into the genetic problems posed by the Canarian endemic P. canariensis.…”

Section: Introductionmentioning

confidence: 99%

Allozyme variation and structure of the Canarian endemic palm tree Phoenix canariensis (Arecaceae): implications for conservation

2004

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Electrophoretic analysis of 18 allozyme loci was used to estimate the levels and structuring of genetic variation within and among natural populations of the protected endemic palm species from the Canary Islands (Phoenix canariensis) to evaluate its genetic relationship with the widespread congener P. dactylifera, and to assess comparatively the genetic variation in the populations where the two species coexist with morphologically intermediate plants (mixed populations). Our survey revealed that the within-population component explains roughly 75% of the genetic variation levels detected in P. canariensis (A ¼ 1.59; P ¼ 41.8; He ¼ 0.158), which rank higher than those reported for other species of the Arecaceae. A Principal Component analysis (PCA) based on allele frequencies consistently separates populations of P. canariensis and P. dactylifera, and reveals a close genetic relationship between P. canariensis and the mixed populations. Reduced levels of genetic variation in P. canariensis with respect to P. dactylifera, the fact that the genetic makeup of the Canarian endemic (with no unique alleles) is a subset of that found in P. dactylifera, and the high genetic identity between both species strongly suggest that P. canariensis is recently derived from a common ancestor closely related to P. dactylifera.

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“…A study of Moroccan palm groves found that nearly 80% of the Marrakech trees were of seedling origin. The same study found that on average more than 50% of all 11 groves included in the study were made up of seedling date palms (Bendiab et al, 1998). The climate of Marrakech is marginal for ripening dates and therefore palms that bear fruit early in the season are preferred (El Houmaizi et al, 1993).…”

Section: Seedling Date Palmsmentioning

confidence: 99%

Seedling date palms (Phoenix dactylifera L.) as genetic resources

Johnsonbr¹,

Jain²

2013

Emir. J. Food Agric

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An accelerating worldwide trend toward planting elite cultivars is leading to genetic erosion and a narrowing of the gene pool upon which the date-palm industry is based. Large numbers of seedling dates are known in many major date-growing countries, as well as in naturalized populations in Spain and the Americas where the palm was intentionally introduced. Seedling dates growing under different climatic conditions from those of the major production areas represent potential genetic resources that should be evaluated for desirable traits. Utilizing modern biotechnology, traits such as disease and pest resistance, hardiness, tolerance of salty soils and improved fruit quality and quantity potentially can be transferred to elite cultivars to sustain and further improve fruit production. Specific examples of important seedling date palm populations in Spain, Peru and Mexico are discussed, as well as new cultivars derived from seedlings in the United States. Research on seedling date populations is recommended, along with the establishment of ex situ germplasm collections of promising specimens as living plants, cold storage of seeds or cryopreservation.

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Preliminary date palm cultivar composition of Moroccan palm groves as revealed by leaf isoenzyme phenotypes

Cited by 21 publications

References 3 publications

In Vitro Conservation of Date Palm Germplasm

In Vitro Conservation of Date Palm Germplasm

Allozyme variation and structure of the Canarian endemic palm tree Phoenix canariensis (Arecaceae): implications for conservation

Seedling date palms (Phoenix dactylifera L.) as genetic resources

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