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Trihybrid Crosses

Trihybrid Crosses

Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...

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Updated: Aug 24, 2025

Microsatellite DNA Genotyping and Flow Cytometry Ploidy Analyses of Formalin-fixed Paraffin-embedded Hydatidiform Molar Tissues

Microsatellite DNA Genotyping and Flow Cytometry Ploidy Analyses of Formalin-fixed Paraffin-embedded Hydatidiform Molar Tissues

Published on: October 20, 2019

PolyHaplotyper: haplotyping in polyploids based on bi-allelic marker dosage data.

Roeland E Voorrips¹, Giorgio Tumino²

¹Wageningen University and Research - Plant Breeding, Wageningen, The Netherlands. roeland.voorrips@wur.nl.

BMC Bioinformatics

|October 24, 2022

Summary

This summary is machine-generated.

This study introduces PolyHaplotyper, a new method for reconstructing haplotypes in polyploids using SNP dosages. It improves accuracy, especially with full-sib families, enhancing genetic analyses.

Keywords:

Haplotype Multi-allelic marker Polyploid SNP array

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Area of Science:

Genetics
Bioinformatics
Computational Biology

Background:

Multi-allelic markers, like haploblocks derived from single nucleotide polymorphisms (SNPs), offer greater genetic information than bi-allelic markers, particularly in polyploids.
Haploblocks are valuable for genetic tasks including linkage mapping, quantitative trait locus (QTL) mapping, and genome-wide association studies.

Purpose of the Study:

To develop a novel method for reconstructing haplotypes from SNP dosages in polyploids.
To implement this method in a user-friendly software package named PolyHaplotyper.
To enhance the accuracy of haplotyping in polyploid organisms.

Main Methods:

A new method for haplotype reconstruction from SNP dosages was developed, specifically designed for polyploids.
The method leverages full-sib families within the dataset to guide the haplotyping process.
The implementation is available as the software package PolyHaplotyper.

Main Results:

The PolyHaplotyper method demonstrates significantly higher accuracy in haplotyping polyploids compared to existing software.
This improved accuracy was validated using both experimental hexaploid and simulated tetraploid data.
The method's effectiveness is particularly pronounced when full-sib families are included in the analysis.

Conclusions:

The developed method and PolyHaplotyper software expand the toolkit for haplotyping in polyploid species.
The software package provides a more accurate approach to haplotyping, especially in the presence of full-sib families.
This advancement facilitates more robust genetic analyses in polyploid organisms.