Linkage, recombination and mutation rate analyses of 16 X-chromosomal STR loci in Sri Lankan Sinhalese pedigrees.

Autor: Perera N; Genetech Molecular Diagnostics, Colombo 08, Sri Lanka. nandikasp@hotmail.com.; Faculty of Health Sciences, The Open University of Sri Lanka, Nawala, Sri Lanka. nandikasp@hotmail.com., Wijithalal R; Department of Zoology and Environment Sciences, University of Colombo, Colombo 03, Sri Lanka., Galhena G; Department of Zoology and Environment Sciences, University of Colombo, Colombo 03, Sri Lanka., Ranawaka G; Faculty of Natural Sciences, The Open University of Sri Lanka, Nawala, Sri Lanka.
Jazyk: angličtina
Zdroj: International journal of legal medicine [Int J Legal Med] 2022 Mar; Vol. 136 (2), pp. 415-422. Date of Electronic Publication: 2022 Jan 13.
DOI: 10.1007/s00414-021-02762-1
Abstrakt: This study investigated genetic linkage, recombination fractions and mutation rates of 16 X chromosomal short tandem repeat (X-STR) markers using a recently developed multiplex PCR assay for Sinhalese population of Sri Lanka, by analyzing 81 three-generation families including 81 grandfathers with daughters and 162 grandsons. In addition, 31 two generation families involving mother father daughter trios were included for mutation analysis. The analysis of recombination fractions between marker pairs identified two linkage blocks (maximum LOD scores > 3.0) each spanning a physical distance of 44.35 Mb and 6.04 Mb respectively. Though recombination events are usually rare among closely linked markers, crossovers were observed for markers located < 1.0 Mb apart. The recombination fractions observed are not fully concordant with those reported earlier, including the second-generation Rutgers combined linkage-physical map. This suggests that linkage is not uniform among different populations. However, the overall and marker-specific mutation rates of the present study did not differ from previous reports, though it needs confirmation with a much larger sample set. The findings presented here will provide the baseline information required for biostatistical calculations conducted using X-STR markers, in complex kinship analysis of Sinhalese population.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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