Drosophila Quantitative Trait Locus Analysis Service

Drosophila quantitative trait locus (QTL) analysis plays a critical role in unraveling the genetic architecture of multifaceted traits, enhancing our comprehension of inheritance patterns, genetic diversity, and potential disease susceptibilities. CD BioSciences provides comprehensive Drosophila research solutions through a dedicated team of experts using advanced QTL analysis.

Introduction to Quantitative Trait Locus in Drosophila

Quantitative trait locus (QTL) analysis is a statistical method used to identify genetic influences on complex traits by comparing phenotypic and genotypic data. In Drosophila research, it is used to spot genetic regions contributing to variations in traits such as body size, lifespan, and behavior. By interbreeding distinct Drosophila strains with different phenotypic traits, researchers can find specific genomic regions associated with these traits through a detailed study of the offspring.

Workflow in search for sQTLs.

Fig.1 Workflow in search for sQTLs. (Qu W., et al. 2017)

QTL analysis process involves genotyping individuals at numerous genetic markers scattered across the genome. Statistical analyses then assess the correlation between phenotypic variation and genetic variation at these markers. Identified QTLs suggest candidate genes influencing the trait. Analysis of different QTL can reveal relationships between variants, genes and disease-driving pathways.

Expression quantitative trait loci (eQTL) eQTL, specific genetic variations that influence gene expression, can affect their targeted genes either locally (cis) or from a distance (trans). eQTL mapping, which requires genome genotyping using methods like array-based or Whole Genome Sequencing (WGS) and RNA-Seq technology for gene expression analysis, helps identify these eQTLs.
Methylation quantitative trait loci (meQTL) meQTL denote genotypic variations that exert a major influence on DNA methylation patterns. The process of meQTL mapping necessitates comprehensive genome-wide genotyping along with DNA methylation scrutiny, carried out either via array-based techniques or sequencing methodologies.
Chromatin accessibility quantitative trait loci (caQTL) caQTL are genetic variants mediating the nucleosome arrangement and modulating the access to our DNA's chromatin structure. A comprehensive mapping of these caQTLs necessitates wide-ranging genotyping either through arrays or whole genome sequencing, in conjunction with scrutinizing chromatin accessibility via techniques like Assay for ATAC-Seq or Hi-C.
Binding quantitative trait loci (bQTL) Quantitative trait loci that exert influence on the binding process of transcription factors, also known as bQTL, are specific variants of genetic material. The process of bQTL mapping entails genome-wide genotyping, which can be achieved either by utilizing arrays or through whole genome sequencing (WGS), in conjunction with ChIP-Seq.
Protein quantitative trait loci (pQTL) pQTL encompass genetic variations that have a direct impact on the quantity of the respective protein. Operating a pQTL study effectively mandates the implementation of genome-wide association studies (GWAS).

QTL analysis provides insights into the genetic architecture of complex traits, uncovering relationships between genes and phenotypes. By enhancing our understanding of Drosophila genetics, QTL analysis contributes to broader scientific insights, including evolutionary biology, human health, and disease research.

Our Services

CD Bioscience provides Drosophila QTL analysis services to help our clients gain insight into Drosophila genetic variants through various QTL analysis. Specifically, our services include but are not limited to the following:


Expression quantitative trait loci analysis


Methylation quantitative trait loci analysis


Chromatin accessibility quantitative trait loci analysis


Binding quantitative trait loci analysis


Protein quantitative trait loci analysis

Want to Learn More?

At CD BioSciences, we understand the significance of your research and the importance of precision in quantitative trait locus analysis. Our commitment to excellence, attention to detail, and personalized approach make us the ideal partner in your pursuit of advancing knowledge in Drosophila genetics. Contact us to discuss your specific research needs and let our Drosophila QTL analysis service pave the way for groundbreaking discoveries in your research endeavors.


  • Macdonald S J, Cloud-Richardson K M, Sims-West D J, et al. Powerful, efficient QTL mapping in Drosophila melanogaster using bulked phenotyping and pooled sequencing. Genetics, 2022, 220(3): iyab238.
  • Nuzhdin S V, Khazaeli A A, Curtsinger J W. Survival analysis of life span quantitative trait loci in Drosophila melanogaster. Genetics, 2005, 170(2): 719-731.
  • Qu W, Gurdziel K, Pique-Regi R, et al. Identification of splicing quantitative trait loci (sQTL) in Drosophila melanogaster with developmental lead (Pb2+) exposure. Frontiers in Genetics, 2017, 8: 145.

For research use only. Not intended for any clinical use.

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