Development and characterization of non-coding RNA based simple sequence repeat markers in Capsicum species.

Area of Science:

• Genetics
• Molecular Biology
• Plant Science

Background:

• Non-coding RNAs (ncRNAs) play crucial roles in regulating plant growth and development.
• ncRNA-based markers offer potential for advancing molecular breeding strategies in crops.
• Developing novel molecular markers is essential for genetic improvement in Capsicum.

Purpose of the Study:

• To develop and characterize novel non-coding RNA-based SSR markers in Capsicum.
• To evaluate the utility of these ncRNA-SSRs for genotyping and species discrimination in Capsicum.
• To assess the potential of ncRNA-SSRs for applications in Capsicum molecular breeding.

Main Methods:

• Development of 623 ncRNA-based SSRs, including microRNA-SSRs (miRNASSRs) and long non-coding RNA-SSRs (lncRNASSRs).
• Genotyping of 96 Capsicum accessions using 120 selected ncRNA-SSRs.
• Polymorphism analysis and cluster analysis (model-based and distance-based) to assess genetic diversity and species differentiation.

Main Results:

• A total of 623 ncRNA-SSRs were developed and distributed across Capsicum chromosomes.
• 75% of the tested ncRNA-SSRs exhibited polymorphism among 96 Capsicum accessions.
• Cluster analysis successfully identified three distinct species-specific clusters for C. annuum, C. frutescens, and C. chinense.

Conclusions:

• The developed ncRNA-SSRs are valuable genetic resources for Capsicum.
• These markers demonstrate potential for interspecific breeding and genetic studies in Capsicum.
• ncRNA-SSRs can aid in mapping genes/QTLs and breeding for diverse traits in Capsicum due to tissue-specific expression and target functions.