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Updated: Aug 4, 2026
FISH for Pre-implantation Genetic Diagnosis
Published on: February 23, 2011
A precise and cost-efficient whole-genome haplotyping method without probands: preimplantation genetic testing
Zhiqiang Zhang1, Kai Kang2, Linan Xu1
1Reproductive Medicine Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China; Guangdong Engineering Technology Research Center of Fertility Preservation, Guangzhou, China; Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
A new whole-genome haplotyping method, Phbol-seq, precisely identifies parental haplotypes for preimplantation genetic testing (PGT). This cost-efficient approach enhances PGT accuracy, reducing genetic disease births and advancing linkage research.
Area of Science:
- Genetics
- Reproductive Medicine
- Bioinformatics
Background:
- Preimplantation genetic testing (PGT) aims to reduce the incidence of genetic diseases.
- Accurate whole-genome haplotyping is crucial for effective PGT.
- Existing methods may lack precision or efficiency for widespread application.
Purpose of the Study:
- To develop and validate a precise and efficient whole-genome haplotyping method.
- To expand the applicability of PGT through improved genetic analysis.
- To establish a cost-efficient approach for genetic research.
Main Methods:
- Whole-genome haplotyping was performed using link-read sequencing (Phbol-seq).
- An optimized analytical workflow with a correction algorithm was developed to differentiate assembly errors and homologous recombination.
- Data from eight cell-line families and 18 clinical families (99 embryos) were analyzed.
Main Results:
- Phbol-seq accurately distinguished and corrected parental assembly errors and homologous recombination.
- Complete genome-wide parental haplotypes were constructed with >95% consistency compared to conventional methods.
- Phbol-seq demonstrated 100% concordance with conventional diagnostic results for all embryos.
Conclusions:
- Phbol-seq is a precise, cost-efficient whole-genome haplotyping method suitable for PGT.
- This method can be applied without probands, facilitating broader PGT use.
- The technology holds significant clinical value for reducing genetic disease births and advancing linkage research.
