Related Experiment Video
Updated: Feb 10, 2026
11:10
Genotypic Inference of HIV-1 Tropism Using Population-based Sequencing of V3
Published on: December 27, 2010
12.8K
hmmIBD: software to infer pairwise identity by descent between haploid genotypes
Stephen F Schaffner1,2, Aimee R Taylor3,4, Wesley Wong5,6
1Infectious Disease and Microbiome Program, Broad Institute of MIT and Harvard, Cambridge, MA, 02142, USA. sfs@broadinstitute.org.
Malaria Journal
|May 17, 2018
Summary
A new software, hmmIBD, accurately estimates identity by descent (IBD) in malaria parasite genomes. This tool aids malaria control by identifying parasite genetic relationships and imported cases.
Area of Science:
- Genetics
- Computational Biology
- Epidemiology
Background:
- Identity by descent (IBD) is crucial for studying malaria epidemiology and control.
- Existing methods for IBD estimation have limitations, particularly for population-level analyses.
Purpose of the Study:
- Introduce hmmIBD, a novel software package for estimating pairwise IBD in haploid genomes.
- Enable IBD estimation between individuals from one or two populations, including malaria parasites.
Main Methods:
- Developed hmmIBD software for pairwise IBD estimation.
- Validated hmmIBD performance using simulated data and benchmarked against existing methods.
- Applied hmmIBD to Plasmodium falciparum genetic data from Cambodia and Ghana.
Main Results:
- hmmIBD demonstrated high accuracy, sensitivity, and specificity, comparable to existing methods.
- The software is computationally efficient, analyzing 50 whole genomes in ~70 seconds on a laptop.
- hmmIBD effectively detects IBD across different populations, improving detection rates.
Conclusions:
- hmmIBD provides a fast and accurate solution for IBD detection in malaria parasite genetic data.
- Facilitates identification of imported malaria cases, supporting malaria elimination efforts.
- The software is robust to genotyping errors and recombination rate variations, with recommended data exclusion for highly variable regions.
Related Concept Videos
01:28Trigonometric Identities II
433
Double-angle and half-angle trigonometric identities are derived from the fundamental sum and difference formulas and serve as essential tools for simplifying expressions, solving equations, and evaluating integrals. These identities reduce the complexity of trigonometric functions by relating functions of a multiple or fractional angle to functions of a single angle. Their applications extend across mathematics, physics, and engineering, particularly in Fourier analysis, wave mechanics, and...
433
01:25Personal Identity
460
Personal identity is the deeply felt sense of self that individuals cultivate over time, intricately woven from intrinsic qualities they consider essential to their existence—qualities such as morality, intelligence, and friendliness. These attributes serve as vital internal benchmarks, guiding individuals in evaluating whether their actions resonate with their true selves.When personal identity takes center stage in one's life, individuals often emphasize their distinctiveness,...
460
01:29Social Identity
358
Social identity constitutes a significant aspect of an individual’s self-concept, shaped by membership in various social groups, including gender, nationality, ethnicity, sexual orientation, and political affiliation. Individuals associate specific traits with particular social groups, leading to internalization of these traits. For example, musicians are often perceived as creative, while women are frequently associated with nurturing tendencies. Once individuals identify with a...
358
01:27Trigonometric Identities I
252
Trigonometric identities are equations that relate trigonometric functions and hold for all angles within their domains. A fundamental identity among these is the Pythagorean identity, which arises directly from the geometry of the unit circle. For any angle θ, a point on the unit circle has coordinates (cos θ, sin θ), and since the radius of the circle is one, the Pythagorean Theorem gives:This identity serves as the basis for deriving additional identities.
252
01:26Marcia's Theory of Identity Status
1.7K
James Marcia's identity status model provides a framework for understanding how adolescents navigate identity formation through varying degrees of exploration and commitment. Marcia's model builds on Erik Erikson's theories of psychosocial development, focusing specifically on how adolescents reconcile individual aspirations with societal expectations. His model describes identity formation as a dynamic process where adolescents move between different states depending on their level...
1.7K
01:15Theory of Attribution I: Correspondent Inference Theory
601
Correspondent inference theory, proposed by Jones and Davis in 1965, seeks to explain how individuals infer stable personality traits from observed behaviors. It suggests that people attribute actions to underlying dispositions rather than external circumstances, particularly when the behavior appears intentional and socially significant.Voluntary Behavior and Dispositional AttributionAccording to this theory, individuals are more likely to attribute behavior to personal traits when it appears...
601