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Exploring Transcriptomic Microsatellite Markers in Hydrangea petiolaris (Hydrangeaceae): A Resource for Population
Seongjun Park1, Sumi Choi2, Saeyeon Hwang2
1Institute of Natural Science Yeungnam University Gyeongsan Gyeongbuk South Korea.
Ecology and Evolution
|April 22, 2026
Summary
Researchers developed new molecular markers for climbing hydrangea (Hydrangea petiolaris) using RNA sequencing. These microsatellite markers are crucial for understanding population genetics and conserving this important ornamental plant.
Area of Science:
- Plant genomics
- Molecular ecology
- Ornamental horticulture
Background:
- Hydrangea petiolaris is an economically important ornamental vine with limited genomic resources.
- Lack of molecular markers hinders population genetic and functional studies for H. petiolaris.
Purpose of the Study:
- To develop and characterize genic microsatellite (SSR) markers for Hydrangea petiolaris.
- To provide a valuable molecular resource for population genetic and conservation studies.
Main Methods:
- Illumina NovaSeq 6000 sequencing to generate RNA-seq data.
- Assembly of reads, identification and annotation of microsatellite repeat motifs.
- Design and validation of SSR primer pairs, genotyping of individuals.
Main Results:
- Generated 39.9 million RNA-seq reads, assembled into 137,715 contigs.
- Identified 54,587 microsatellite motifs in 33,556 transcripts; 16,739 functionally annotated.
- Developed 30 polymorphic microsatellite loci, showing strong genetic differentiation in island populations.
Conclusions:
- This study provides a substantial genic SSR resource for Hydrangea petiolaris.
- Validated SSR markers are effective for population-level analyses and conservation efforts.
- The developed markers can be applied to broader sampling and related Hydrangea species.
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