X-STR locus fluorescence labeling composite amplification system and application thereof
A composite amplification system and fluorescent labeling technology, which is applied in the direction of fluorescence/phosphorescence, microbial measurement/inspection, biochemical equipment and methods, etc., can solve the problem of limiting the application of X-chromosomal genetic markers, the difficulty of increasing genetic markers, and the high price of kits and other problems, to achieve the effect of low mutation rate, high sensitivity, and accurate typing results
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[0056] Example 1 Using the X-STR locus fluorescent labeling multiplex amplification system containing 14 loci to identify sisters and identify grandmothers and granddaughters.
[0057] Principle: The X chromosome is the human sex chromosome, and X-STR is a type of polymorphic genetic marker on the sex chromosome. The X-STR of a male can only be obtained from his mother in the form of haplotype, and can only be passed on to his daughter. Therefore, sisters born to the same father have 1 identical allele at the X-STR locus. Same paternal origin cannot be ruled out if 1 identical allele at all X-STR loci is present in a sample of suspect sisters, but can be ruled out if no identical allele at 3 or more X-STR loci It is from the same father. Similarly, the granddaughter’s X-STR locus has 1 allele that is the same as her grandmother’s, so the suspected grandmother and granddaughter have 1 of the same alleles in all X-STR loci, and their genetic relationship cannot be ruled out. If...
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