Genetic Analysis of Soybean Flower Size Phenotypes Based on Computer Vision and Genome-Wide Association Studies

Area of Science:

• Plant Biology
• Genetics
• Agricultural Science

Background:

• Organ dimensions in plants, like flowers and seeds, are regulated by cell proliferation and expansion.
• Soybean organ size strongly influences crop yield and quality, yet genes controlling flower size remain understudied.
• Understanding these genetic factors is vital for soybean breeding and agricultural productivity.

Purpose of the Study:

• To identify genes regulating soybean flower organ size.
• To explore the correlation between flower and seed dimensions.
• To discover candidate genes for enhancing soybean breeding and crop yield.

Main Methods:

• Re-sequencing of 309 soybean samples (cultivar, landrace, wild).
• Microscopic imaging and computer vision for phenotypic data extraction of flower organs.
• Genome-wide association studies (GWAS) and haplotype analysis to identify significant SNPs and candidate genes.

Main Results:

• A strong positive correlation was found between soybean petal and seed sizes.
• Identified significant SNPs associated with vexil, wing, and keel petals.
• Discovered 25 and 10 candidate genes in vexil and wing regions, respectively, including *Glyma.07G234200*.

Conclusions:

• The study provides novel insights into genes governing soybean organ development.
• Identified candidate genes can aid in selecting breeding materials and improving crop yield.
• This research accelerates soybean breeding by targeting specific genetic pathways for organ size control.