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Published on: March 24, 2023
KIMGENS: a novel method to estimate kinship in organisms with mixed haploid diploid genetic systems robust to
Yen-Wen Wang1, Cécile Ané1,2
1Department of Botany, University of Wisconsin-Madison, Madison, WI 53706, USA.
Motivation:
Kinship estimation is necessary for evaluating violations of assumptions or testing certain hypotheses in many population genomic studies. However, kinship estimators are usually designed for diploid systems and cannot be used in populations with mixed haploid diploid genetic systems. The only estimators for different ploidies require datasets free of population structure, limiting their usage.
Results:
We present KIMGENS (Kinship Inference for Mixed GENetic Systems), an estimator for kinship estimation among individuals of various ploidies, that is robust to population structure. This estimator is based on the popular KING-robust estimator but uses diploid relatives of the individuals of interest as references of heterozygosity and extends its use to haploid-diploid and haploid pairs of individuals. We demonstrate that KIMGENS estimates kinship more accurately than previously developed estimators in simulated panmictic, structured and admixed populations, but has lower accuracy when the individual of interest is inbred. KIMGENS also outperforms other estimators in a honeybee dataset. Therefore, KIMGENS is a valuable addition to a population geneticist's toolbox.
Availability And Implementation:
KIMGENS and its association simulation tool are implemented and available open-source at https://github.com/YenWenWang/HapDipKinship.
Supplementary Information:
Supplementary data are available at Bioinformatics online.
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