Diversity of leaf peroxidases in date palm (Phoenix dactylifera L.) as revealed in an example of marginal (seedling derived) palm groves

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

doi:10.1016/s0304-4238(02)00032-8

Cited by 26 publications

(13 citation statements)

References 18 publications

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“…Such morphological features are sensitive to environmental factors and can be observed only in mature trees. In addition, biochemical studies, including isozyme analyses and activity analyses of peroxidases have been used to characterize date palms in Morocco and Tunisia (Baaziz and Saaidi 1988;Baaziz 1988;Bendiab et al 1998;Salem et al 2001;Majourhat et al 2002;Baaziz et al 2002). However, isozymes appear to be of a limited use due to low levels of polymorphisms (Al-Jibouri and Adham 1990).…”

Section: Introductionmentioning

confidence: 99%

Microsatellite markers reveal high genetic diversity in date palm (Phoenix dactylifera L.) germplasm from Sudan

2007

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Genetic diversity in date palm germplasm from Sudan representing 37 female and 23 male accessions was investigated using 16 loci of microsatellite (SSR) primers. Eight female accessions from Morocco were included as reference material. The tested SSR markers showed a high level of polymorphism. A total of 343 alleles were detected at the 16 loci. The number of alleles per marker ranged from 14 to 44 with an average of 21.4 per locus. A high level of expected heterozygosity was observed among Sudan cultivars (0.841), Morocco cultivars (0.820) and male accessions (0.799). The results indicate that the genetic groups of the Sudan cultivars and/or males do not follow a clear geographic pattern. However, the morocco group showed significant differentiation in relation to the Sudan groups, as measured by F (ST) values and genetic distances. The effect of the methods of pollination and cultivar selection on the genetic structure was clearly detected by the weak clustering association that was observed for the majority of accessions originating from Sudan and Morocco as well. This suggests the need for further investigation on the genetic diversity of Sudanese date palm germplasm. A deeper insight will be revealed by a detailed analysis of populations originating from different geographic locations.

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Section: Introductionmentioning

confidence: 99%

Microsatellite markers reveal high genetic diversity in date palm (Phoenix dactylifera L.) germplasm from Sudan

2007

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“…The success of particular genetic conservation or breeding program is dependent on understanding the amount and distribution of the genetic variation already present in the genetic pool (Jubrael et al 2005 ). In addition, biochemical studies including isozyme and activity analyses of peroxidases have been used to characterize date palms in Morocco and Tunisia (Baaziz 1988 ;Baaziz and Saaidi 1988 ;Bendiab et al 1998 ;Majourhat et al 2002 ;Ould Salem Mohamed et al 2001 ). As such, analysis does not refl ect precisely the polymorphisms which have occurred (Al-Jibouri and Adham 1990 ).…”

Section: Research In Molecular Descriptorsmentioning

confidence: 99%

Date Palm Status and Perspective in Iraq

Khierallah

Bader

Ibrahim³

et al. 2015

Date Palm Genetic Resources and Utilization

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Iraq is the birthplace of the date palm, and historically it was the domestication center of this crop. Moreover, for some years, Iraq was the largest producer of dates in the world. Many factors negatively have affected both the production and natural genetic diversity of the crop. However, efforts are being made by the Iraqi authorities and researchers alike to compensate for the serious damage the date palm sector has experienced over the past 30 years. New approaches have been introduced including biotechnology, grove management, pest control, and industrial practices. Production limitations have been diagnosed and constraints are on their way to be resolved. Date palm plantations are under stress from many biotic and abiotic factors including key insect pests like dubas bug, lesser date moth, trunk and stalk borers, and Old World date mite. Date palm diseases cause serious damages to date palm trees especially where stress factors are present such as palm weakness, soil salinity, high water table, borers, and tree aging. The use of plant tissue culture to support propagation by offshoots is necessary and started in the early 1980s. Both direct organogenesis and callus induction with subsequent asexual embryo formation protocols were achieved. Approximately, 600 date palm cultivars were grown in Iraq before 1980; however, currently their number is reduced to 500. Morphological

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“…Moreover, mutations induced by irradiation of seeds could benefit the expansion of the gene pool available for selection in date palm breeding schemes. Male and female seedling date palms were used by Majourhat et al (2002) in Morocco to study the diversity of leaf peroxidases and their potential as genetic markers.…”

Section: Other Uses Of 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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Diversity of leaf peroxidases in date palm (Phoenix dactylifera L.) as revealed in an example of marginal (seedling derived) palm groves

Cited by 26 publications

References 18 publications

Microsatellite markers reveal high genetic diversity in date palm (Phoenix dactylifera L.) germplasm from Sudan

Microsatellite markers reveal high genetic diversity in date palm (Phoenix dactylifera L.) germplasm from Sudan

Date Palm Status and Perspective in Iraq

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

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