Begonia includes more than 2,000 species distributed across tropical and subtropical regions worldwide. The genus is well known for its striking foliage, ornamental value, and ecological diversity. However, its genetic complexity has posed challenges for researchers attempting to characterize genome size variation and its evolutionary implications.
In this study, researchers applied modern analytical techniquesflow cytometry to
reassess genome size across a broad sampling of Begonia species conserved at the
Ornamental Plant Germplasm Center (OPGC), one of the U.S. National Plant
Germplasm System genebanks dedicated to preserving herbaceous ornamental plant
genetic resources. . The findings reveal significant variability in genome size within the
genus, providing value resources that will help researchers better understand Begonia
reflecting its evolutionary diversity and support breeding effort and adaptation to a wide
range of environments. The updated estimates improve upon previous measurements
by using refined methodologies that enhance accuracy and consistency.
The study highlights patterns of genome size evolution and suggests potential links
between genome size and key biological traits. These insights contribute to a deeper
understanding of how genomic characteristics may influence plant form, function, and
Adaptability.
Beyond its scientific contributions, the research has practical implications. Accurate genome size data can support plant breeding efforts, This study also assists in species identification and, establishes a foundation for future genomic and evolutionary studies, particularly for and inform conservation strategies for rare or endangered and underrepresented Begonia species. The findings also establish a foundation for futuregenomic and evolutionary studies within the genus.
By providing a clearer picture of genome size diversity in Begonia, this work represents a meaningful step forward in plant genetics research and underscores the importance of continued exploration of complex and species-rich plant groups.
This study was led by Dr. Yu Ma, Director of OPGC and Assistant Professor in the Department of Horticulture and Crop Science at The Ohio State University. Her research focus on ornamental crop improvement through breeding, genetic and genomics. Senior author, Dr. Jinjin Song is a post-doctoral Research Associate at The Ohio State University. Her research focuses on developing genomic resources using bioinformatics and computational approaches.
This research was a collaborative effort among researchers at The Ohio State University, University of Florida, USDA-ARS, and Auburn University. By combining multidisciplinary expertise, the team aimed to advance understanding of Begonia diversity and provide valuable resources for future research, breeding, and conservation efforts.
The full article can be found on the Journal of the American Society for Horticultural Science electronic journal website at: https://doi.org/10.21273/JASHS05584-25
Established in 1903, the American Society for Horticultural Science is recognized around the world as one of the most respected and influential professional societies for horticultural scientists. ASHS is committed to promoting and encouraging national and international interest in scientific research and education in all branches of horticulture.
Comprised of thousands of members worldwide, ASHS represents a broad cross-section of the horticultural community – scientists, educators, students, landscape and turf managers, government, extension agents and industry professionals. ASHS members focus on practices and problems in horticulture: breeding, propagation, production and management, harvesting, handling and storage, processing, marketing and use of horticultural plants and products. To learn more, visit ashs.org.
