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Method of identifying date palm gender using scar primers

a date palm and gender technology, applied in the field of identifying date palm gender, can solve the problems of reducing genetic diversity, significantly increasing the cost of cultivating dates from seeds, and inability to determine the gender of individual date palm plants

Inactive Publication Date: 2016-09-22
KING SAUD UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method to determine the gender of a Date Palm plant using a specific marker found only in male plants. This allows for the sexual identification of a Date Palm plant prior to flowering. The technical effect of this method is the ability to accurately and quickly determine the gender of a specific date palm plant, which can aid in the selection and breeding of desirable traits.

Problems solved by technology

Unfortunately, the gender of individual Date Palm plants cannot be determined until they reach reproductive age, between five and ten years old.
This significantly increases the cost of cultivating Dates from seeds, as only the female plants bear fruit.
However, reliance upon offshoot propagation reduces genetic diversity, increasing the risk of catastrophic loss to diseases and decreasing the capacity of the plants to survive changes in environmental conditions.

Method used

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  • Method of identifying date palm gender using scar primers
  • Method of identifying date palm gender using scar primers

Examples

Experimental program
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Effect test

example 1

Extraction of Plant DNA

[0034]Genomic DNA was extracted using reagents from Qiagen. Date Palm varieties were collected from Dirab, Saudi Arabia. Small pieces of Date Palm leaf tissue (200 mg) were frozen in liquid nitrogen and ground to a fine powder in a mortar. The frozen-ground tissues were transferred to 2 ml micro-centrifuge tubes and mixed for ten minutes in 800 μl of extraction buffer (preheated to 65 degrees Celsius) with 10 microliters of RNase A (10 mg / ml). Three percent of PVP (Qiagen) and beta-mercaptoethanol were added and mixed by inversion. The mixture was incubated at 65° C. for 30 min, with inversion every five minutes. The mixture was cooled to room temperature, and an equal volume of chloroform: isoamyl alcohol (24:1) was added and mixed frequently for 20 minutes. The mixture was then centrifuged at 10,000 rpm for 10 minutes at room temperature. The aqueous phase was transferred to another tube and an equal volume of ice cooled isopropanol was added. This mixture w...

example 2

RAPD Analysis

[0035]Analysis of RAPD was used to screen 300 arbitrary sequence decamer primers (Operon Technologies). Each primer was tested using DNA from seven male and seven female Date Palm cultivars. PCR reactions were performed in 20 microliter reaction volumes containing: 4 microliters 5× HOT FIREPol Blend Master Mix Ready to Load, 2 microliters of the RAPD Primer (15 ng / ul), 2 microliters of the template DNA (25 ng / ul), and 12 microliters of deionized water. DNA amplification was performed using an Applied Biosystems 96 well thermal cycler, with a first cycle of 5 minutes at 94 degrees Celsius, forty cycles of one minute at 94 degrees Celsius followed by one minute at 36 degrees Celsius followed by one minute at 72 degrees Celsius, and one cycle of 7 minutes at 72 degrees Celsius. Amplification products were analyzed by gel electrophoresis in 1.3% agarose gel with 1×TBE (Tris / Borate / EDTA) buffer. Gels were stained with ethidium bromide and visualized with UV light. Each ampli...

example 3

Unique Band Selection from RAPD Profile

[0036]A DNA marker that was present in corresponding male or female samples and absent in the alternate sex samples was recognized as a potential sex-linked marker. Further PCR analysis of the corresponding RAPD primer (SEQ ID NO: 4) was performed on additional male and female cultivars to confirm the results.

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Abstract

The method of identifying Date Palm gender using SCAR primers includes using modern genetics techniques for detecting a novel sex-linked marker (SEQ ID NO: 1) in a Date Palm sample. The presence of the Date Palm sex-linked marker (SEQ ID NO: 1) in the sample is indicative that the sample is from a male Date Palm plant. The method of identifying Date Palm gender to determine the gender of Date Palms can be used to determine the gender of Date Palms of any age.

Description

INCORPORATION BY REFERENCE OF MATERIAL SUBMITTED IN COMPUTER READABLE FORM[0001]The Applicants hereby incorporate by reference the sequence listing contained in the ASCII text file titled 32693_12_sequence_listing_ST25.txt, created Mar. 10, 2015 and having 1.07 KR of data.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to early identification of the gender of individual plants of the species Phoenix dactylifera (“Date Palm”), and particularly to identifying Date Palm gender using Sequence Characterized Amplified Regions (“SCAR”) primers specific for a novel sex-linked genetic sequence.[0004]2. Description of the Related Art[0005]The Date Palm is a long-lived dioecious monocotyledon, which is cultivated in arid regions for food, fiber, and shelter. It is a member of the Palmae family and its fruit, dates, are known to provide a good source of energy, vitamins, phosphorus, iron, zinc, selenium, manganese, and calcium. (Ellecuh, M. et al., ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C12Q1/68
CPCC12Q1/6879C12Q2600/13C12Q1/6806C12Q1/6895
Inventor ALAMERI, ABDULHAFED ABDULLAH HASSANAL-QURAINY, FAHAD HAMADKHAN, SALIMNADEEM, MOHAMMADGAAFAR, ABDEL-RHMAN ZAKARIA
Owner KING SAUD UNIVERSITY
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