polyqtlR

polyqtlR performs QTL interval mapping and meiotic-pattern analysis in autopolyploid bi‑parental F1 populations to characterize the genetic architecture of quantitative traits in outcrossing polyploid crops.

Key Features:

• Ploidy-Level Flexibility: Handles QTL interval mapping across a range of ploidy levels in outcrossing polyploid crops.
• Identity-by-Descent (IBD) Probabilities: Estimates identity-by-descent (IBD) probabilities for inference of inheritance patterns and QTL detection.
• Allelic Composition Exploration: Explores the allelic composition of identified QTLs to identify and track favorable alleles within populations.
• Visualization Tools: Produces visualizations of genetic data and QTL results to aid interpretation of mapping outputs.
• Inclusion of Genetic Co-factors and Experimental Factors: Incorporates genetic co-factors and experimental factors into analyses to account for additional sources of variation.
• Meiotic Pattern Analysis: Predicts multivalent pairing structures, detects preferential chromosomal pairing, and locates double reduction events.

Scientific Applications:

• Breeding and genetic improvement of polyploid crops: Supports analysis of phenotypic variation and identification of QTLs underlying traits such as yield and disease resistance in autopolyploid breeding populations.

Methodology:

Performs QTL interval mapping using identity-by-descent (IBD) probabilities within F1 populations of outcrossing polyploids.