Genotypic_Path_app: Genotypic Path

In TBA: Collection of 'shiny' Apps for Tree Breeding Analysis

Genotypic Path

Description

Genotypic_Path_app() function opens an interactive and user-friendly Shiny application that enables users to perform genotypic path analysis.

Usage

Genotypic_Path_app()

Details

The application is designed to perform genotypic path analysis using experimental data.

Users can upload an Excel file (.xlsx or .xls) containing observations for several genotypes and traits. After uploading the file users should click the "Analyze" button.

The output includes:

• A table displaying direct and indirect effects of independent traits on the dependent trait.

• Residual effect value.

The result table can be downloaded in CSV format.

Note: The analysis is based on the Randomized Block Design (RBD).

Value

Opens a user-friendly interactive Shiny application for performing genotypic path analysis.

Data Format

The uploaded Excel file should be formatted as follows:

• First column: Replication

• Second column: Genotypes

• Subsequent columns: Trait values (e.g., DBH, PH, FW, SW, KW, OC)

• Important: The last column must be the dependent trait for path analysis. For example, if OC (Oil Content) is the dependent trait , it must be in the last column.

Trait names should be concise. Example:

• DBH : Diameter at Breast Height

• PH : Plant Height

• FW : Fruit Weight

• SW : Seed Weight

• KW : Kernel Weight

• OC : Oil Content

Note: The uploaded file name should not contain spaces. For example, use Sample_Data.xlsx instead of Sample Data.xlsx.

An example Excel file is available for download using the Download Example Data button within the application.

The example dataset includes:

• 170 genotypes

• 3 replications for each genotype

• 6 traits: 5 independent traits (DBH, PH, FW, SW, KW) and 1 dependent trait: OC

References

Singh, R. K., & Chaudhary, B. D. (1977). Biometrical Methods in Quantitative Genetic Analysis.
Dewey, D. R., & Lu, K. H. (1959). A Correlation and Path-Coefficient Analysis of Components of Crested Wheatgrass Seed Production.Agronomy Journal, 51(9), 515-518.

Examples

if(interactive()) Genotypic_Path_app()

TBA documentation built on June 8, 2025, 1:07 p.m.