Genotype by Yield*Trait (GYT) Biplot: a Novel Approach for Genotype Selection based on Multiple Traits.

Area of Science:

• Plant breeding and genetics
• Agricultural science
• Quantitative genetics

Background:

• Genotype selection relies on subjective weighting or culling, leading to potential bias.
• Evaluating genotypes across multiple traits is crucial for effective plant breeding.

Purpose of the Study:

• To introduce and demonstrate the genotype by yield*trait (GYT) biplot as a novel, objective method for multi-trait genotype selection.
• To shift the paradigm of genotype evaluation from individual traits to a combined assessment of yield and other target traits.

Main Methods:

• Development and application of the genotype by yield*trait (GYT) biplot.
• Graphical analysis of genotype performance across yield and multiple other traits.
• Utilizing a multi-year, multi-location oat dataset for demonstration.

Main Results:

• The GYT biplot provides a graphical, objective, and straightforward method for genotype selection.
• It effectively ranks genotypes based on their combined performance in yield and other traits.
• The biplot visualizes individual genotype profiles, highlighting strengths and weaknesses across traits.

Conclusions:

• The GYT biplot offers a significant improvement over traditional subjective methods for multi-trait genotype selection.
• This approach facilitates a more comprehensive and accurate evaluation of breeding candidates.
• The GYT biplot paradigm shift enhances the efficiency and objectivity of plant breeding programs.