Genetic Relationships, Whole-Fruit Oil Variations, and Quantitative Trait Diversity in Elite Symplocos paniculata Accessions from Hunan Revealed by GBS.
- 1State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, China.
- 2College of Life Science and Technology, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China.
Abstract
Symplocos paniculata is a promising woody oil species, but the genetic diversity and joint variation in whole-fruit, tissue-specific oil, fatty acid, and quantitative traits remain insufficiently characterized. Thirty elite accessions from six geographic origins in Hunan Province were evaluated using genotyping-by-sequencing, whole-fruit and tissue-specific oil measurements, fatty acid profiling, and 12 quantitative traits. A total of 6335 single-nucleotide polymorphisms revealed geographic differentiation together with substantial within-origin heterogeneity. The principal diversity, PCoA, AMOVA, and pairwise FST patterns remained stable after exclusion of a high-missingness accession. Whole-fruit oil content averaged 34.91% and ranged from 18.54% to 51.35%, with oleic acid as the predominant fatty acid. An additional tissue-specific experiment showed higher mean oil contents in non-seed than seed tissues (37.22% vs. 30.32%) and clear differences in fatty acid composition. Dry-mass-weighted reconstruction closely reproduced measured whole-fruit oil content (Pearson r = 0.935), indicating that whole-fruit variation reflects tissue-specific oil accumulation rather than tissue proportion alone. In the original 72-test analysis, pooled morphology-oil associations did not retain Benjamini-Hochberg significance after adjustment for geographic origin or genetic structure. In a separate 15-test tissue-specific reassessment, infructescence width remained positively associated with non-seed oil content in pooled, origin-adjusted, and genetic-adjusted models. These results characterize complementary genetic and oil-related variations among the sampled accessions and identify tissue-specific relationships that warrant independent validation in replicated common-garden and multi-year trials.
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BibTeX
@article{zhao2026genetic,
title = {{Genetic Relationships, Whole-Fruit Oil Variations, and Quantitative Trait Diversity in Elite Symplocos paniculata Accessions from Hunan Revealed by GBS.}},
author = {Jiating Zhao and Beilei Xie and Lijuan Jiang and Yan Yang and Changzhu Li and Jingzhen Chen and Peiwang Li and Yanju Song and Xiao Zhou and Qiang Liu and Yunzhu Chen},
journal = {Biology},
year = {2026},
month = sep,
doi = {10.3390/biology15191702},
url = {https://europepmc.org/article/MED/42883375},
note = {CC BY},
}
RIS
TY - JOUR
TI - Genetic Relationships, Whole-Fruit Oil Variations, and Quantitative Trait Diversity in Elite Symplocos paniculata Accessions from Hunan Revealed by GBS.
AU - Jiating Zhao
AU - Beilei Xie
AU - Lijuan Jiang
AU - Yan Yang
AU - Changzhu Li
AU - Jingzhen Chen
AU - Peiwang Li
AU - Yanju Song
AU - Xiao Zhou
AU - Qiang Liu
AU - Yunzhu Chen
PY - 2026
DA - 2026/09/24
JO - Biology
DO - 10.3390/biology15191702
UR - https://europepmc.org/article/MED/42883375
AB - Symplocos paniculata is a promising woody oil species, but the genetic diversity and joint variation in whole-fruit, tissue-specific oil, fatty acid, and quantitative traits remain insufficiently characterized. Thirty elite accessions from six geographic origins in Hunan Province were evaluated using genotyping-by-sequencing, whole-fruit and tissue-specific oil measurements, fatty acid profiling, and 12 quantitative traits. A total of 6335 single-nucleotide polymorphisms revealed geographic differentiation together with substantial within-origin heterogeneity. The principal diversity, PCoA, AMOVA, and pairwise FST patterns remained stable after exclusion of a high-missingness accession. Whole-fruit oil content averaged 34.91% and ranged from 18.54% to 51.35%, with oleic acid as the predominant fatty acid. An additional tissue-specific experiment showed higher mean oil contents in non-seed than seed tissues (37.22% vs. 30.32%) and clear differences in fatty acid composition. Dry-mass-weighted reconstruction closely reproduced measured whole-fruit oil content (Pearson r = 0.935), indicating that whole-fruit variation reflects tissue-specific oil accumulation rather than tissue proportion alone. In the original 72-test analysis, pooled morphology-oil associations did not retain Benjamini-Hochberg significance after adjustment for geographic origin or genetic structure. In a separate 15-test tissue-specific reassessment, infructescence width remained positively associated with non-seed oil content in pooled, origin-adjusted, and genetic-adjusted models. These results characterize complementary genetic and oil-related variations among the sampled accessions and identify tissue-specific relationships that warrant independent validation in replicated common-garden and multi-year trials.
SN - 2079-7737
ER -