How to tell sex of a date palm
Based on cytological studies with chromomycin staining, Siljak-Yakovlev et al. In this paper, we have attempted to identify sex-specific DNA markers for date palm cultivars using a microsatellite molecular technique. The new research provides the first DNA sequence evidence that gender is under genetic control through an X-Y system of gender inheritance similar to that of humans. The project also validated the genetic identity of the male and female varieties maintained in the United States against same-named varieties from the Middle East, reinforcing the integrity of the collection after being maintained for many years in several different locations. A severe fusarium wilt of date palm, Fusarium oxysporum, recently destroyed date palms throughout Africa. The fruit is a major source of nutrition in the areas, and the tree itself plays an important role in the development of sustainable agriculture in many drought and saline-affected regions of the world. The problem was exacerbated by the lack of natural genetic diversity in date palm populations, which may be overcome by introducing genetic variability into populations especially for traits which confer disease resistance.
The problem was exacerbated by the lack of natural genetic diversity in date palm populations, which may be overcome by introducing genetic variability into populations especially for traits which confer disease resistance. Department of Agriculture's Agricultural Research Service. Our objective was to identify microsatellite markers that could be used to differentiate between male and female date palm Phoenix dactylifera. Based on the above results, we hypothesize that the third signal unpaired signal of 45S rDNA probe characterized in both Siwi and Zaghloul males is located on a male chromosome Y chromosome. A severe fusarium wilt of date palm, Fusarium oxysporum, recently destroyed date palms throughout Africa. In recent years, there have been serious efforts to understand the basis of sex determination in date palm and to develop methods of identifying the gender at an early stage using isozymes Torres and Tisserat , peroxydases Majourhat et al. We speculated that kind of similarity is not just a coincidence. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author s and the source are credited. These differential bands were sequenced. The WCMC-Q research used samples that were part of a date palm breeding program carried out in California from to and incorporated into a national repository, which maintained the lines as part of a mission of conservation of genetic resources. The finding provides a crucial piece of information for more efficient cultivation and propagation, as well as additional genetic studies. In this paper, we have attempted to identify sex-specific DNA markers for date palm cultivars using a microsatellite molecular technique. Such a technique would not only facilitate the identification and selection of good male pollinators for use in breeding programs but could also be used to select date palm with characteristics of high fruit yield, and an improved physical and chemical characteristic of the fruits. References in the Quran have kept alive the use of dates for medicinal purposes over the centuries. Received Jan 5; Accepted Feb These results indicate that sex-differentiation process have to be addressed at system biology level for deep and better understanding. These results revealed hypothesis that sex differentiation is a complex but well-organized process that involves endogenous and exogenous factors regulate and control the changes in gene expression, physiology, metabolism and architecture of the plant. Based on cytological studies with chromomycin staining, Siljak-Yakovlev et al. Date palm is a dioecious species, meaning that individual plants are either male or female; but the mechanism for gender determination in date palms has been a central question for thousands of years. Date palm progenies consist of male and female individuals in equal proportions, which has led to the hypothesis that sex is determined genetically Daher et al. The dioecy represents the major challenge in development of breeding programs as it is impossible to distinguish tree gander till they flower approximately five to eight years after planting. The ability to type the sex of seedlings would speed this otherwise lengthy process Juarez and Banks The repository is operated by U. Researchers at Weill Cornell Medical College in Qatar WCMC-Q have identified a region of the date palm genome linked to gender, making it possible for the first time to quickly and easily identify male and female trees. Female trees bear the fruit, making them much more valuable than male trees, but early identification of the more valuable female trees is difficult because it takes about five to eight years for female seedlings to bear the distinguishing fruit. To date, sex-differentiation mechanism is still uncertain and there is no reliable way to determine the sex of date palm plants before reproductive age across all cultivars. These cultivars represent the diversity of date palm genotypes in the Qatari date palm plantation.
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