Pod-shattering characteristics differences between two groups of soybeans are associated with specific changes in...

Area of Science:

• Plant Biology
• Genomics
• Agricultural Science

Background:

• Soybean (Glycine max) is a vital crop, but pod dehiscence leads to significant yield reduction.
• Understanding the genetic basis of pod shattering is crucial for improving soybean cultivation.

Purpose of the Study:

• To identify genes and long non-coding RNAs (lncRNAs) associated with soybean pod dehiscence.
• To compare gene expression profiles between shattering-sensitive and shattering-resistant soybean accessions.
• To provide a resource for molecular breeding of soybeans with reduced shattering.

Main Methods:

• Measurement of fruit-cracking forces and dehisced pod percentages in ten soybean accessions.
• RNA sequencing (RNA-seq) of pod transcriptomes from shattering-sensitive (SS) and shattering-resistant (SR) groups.
• Validation of differentially expressed genes (DEGs) using real-time quantitative reverse transcription PCR (RT-qPCR).
• De novo identification and co-expression network analysis of lncRNAs and genes.

Main Results:

• 225 differentially expressed genes (DEGs) were identified between SS and SR soybeans, with some previously linked to pod dehiscence.
• Expression patterns of selected DEGs were validated by RT-qPCR.
• 246 pod-long intergenic lncRNAs, 401 intronic lncRNAs, and 23 antisense lncRNAs were identified.
• Distinct gene and lncRNA co-expression patterns were observed between SS and SR soybeans.

Conclusions:

• This study systematically investigated candidate genes and molecular pathways contributing to soybean pod dehiscence.
• The findings offer a valuable resource for the molecular breeding of soybeans with enhanced shattering resistance.
• Understanding these molecular mechanisms can help mitigate yield losses in soybean production.