Genetic diversity and population structure analysis of Franklinia alatamaha, a tree species existing only in cultivation

Gladfelter, Heather J.; Yadav, Lav K.; Merkle, S. A.; Wilde, H. Dayton

doi:10.1007/s11295-020-01455-x

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…Bartram ex. Marshall (Gladfelter et al, 2020;Plummer, 1977). This species slowly became extinct from its native habitat in southeast Georgia, U.S., near the Altamaha River (Plummer, 1977).…”

Section: Introductionmentioning

confidence: 99%

“…This concern scenario mirrors a similar pattern observed with a close relative of S. ovata native to the southeastern United States, Franklinia alatamaha (Franklin tree) W. Bartram ex. Marshall (Gladfelter et al., 2020 ; Plummer, 1977 ). This species slowly became extinct from its native habitat in southeast Georgia, U.S., near the Altamaha River (Plummer, 1977 ).…”

Section: Introductionmentioning

confidence: 99%

“…This species slowly became extinct from its native habitat in southeast Georgia, U.S., near the Altamaha River (Plummer, 1977 ). The cause of extinction is still unknown, but flooding and the invasive pathogen, Phytophthora cinnamomi Rands, are suspected to be driving factors (Gladfelter et al., 2020 ; Koslow & Peterson, 1980 ; Meyer et al., 2009 ; Prince, 1977 ). Due to the phylogenetic closeness of S. ovata and F. alatamaha , and its status as an ecologically narrow endemic, there is a cause for concern that S. ovata might suffer a similar fate.…”

Section: Introductionmentioning

confidence: 99%

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Genetic diversity and population structure of a rare flowering tree endemic to Appalachia, Stewartia ovata

Yadav,

Bellis,

Smith

et al. 2024

Ecology and Evolution

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Stewartia ovata (cav.) Weatherby, commonly known as mountain stewartia, is an understory tree native to the southeastern United States (U.S.). This relatively rare species occurs in isolated populations in Virginia, Kentucky, Tennessee, North Carolina, South Carolina, Georgia, Alabama, and Mississippi. As a species, S. ovata has largely been overlooked, and limited information is available regarding its ecology, which presents obstacles to conservation efforts. Stewartia ovata has vibrant, large white flowers that bloom in summer with a variety of filament colors, suggesting potential horticultural traits prized by ornamental industry. However, S. ovata is relatively slow growing and, due to long seed dormancy, propagation is challenging with limited success rates. This has created a need to assess the present genetic diversity in S. ovata populations to inform potential conservation and restoration of the species. Here, we employ a genotyping‐by‐sequencing (GBS) approach to characterize the spatial distribution and genetic diversity of S. ovata in the southern Appalachia region of the eastern United States. A total of 4475 single nucleotide polymorphisms (SNPs) were identified across 147 individuals from 11 collection sites. Our results indicate low genetic diversity (He = 0.216), the presence of population structure (K = 2), limited differentiation (FST = 0.039), and high gene flow (Nm = 6.16) between our subpopulations. Principal component analysis corroborated the findings of STRUCTURE, confirming the presence of two distinct S. ovata subpopulations. One subpopulation mainly contains genotypes from the Cumberland Plateau, Tennessee, while the other consists of genotypes present in the Great Smoky Mountain ranges in Tennessee, North Carolina, and portions of Nantahala, Chattahoochee‐Oconee national forests in Georgia, highlighting that elevation likely plays a major role in its distribution. Our results further suggested low inbreeding coefficient (FIS = 0.070), which is expected with an outcrossing tree species. This research further provides necessary insight into extant subpopulations and has generated valuable resources needed for conservation efforts of S. ovata.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic diversity and population structure of a rare flowering tree endemic to Appalachia, Stewartia ovata

Yadav,

Bellis,

Smith

et al. 2024

Ecology and Evolution

View full text Add to dashboard Cite

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“…Recently, RADseq has been used for genetic diversity studies of the ornamental plants Eremurus spp . [ 33 ], Franklinia alatamaha [ 34 ], Hydrangea macrophylla [ 35 ], Papaver spp. [ 36 ], Rhododendron canescens [ 37 ], and Rhododendron meddianum [ 38 ] as well as for wild-collected C .…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity analysis of big-bracted dogwood (Cornus florida and C. kousa) cultivars, interspecific hybrids, and wild-collected accessions using RADseq

Moreau,

Medberry,

Honig

et al. 2024

PLoS ONE

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Big-bracted dogwoods are popular ornamental trees known for their beautiful spring blooms with showy bracts and four-season appeal. The two most widely grown species are Cornus florida and Cornus kousa, native to Eastern North America and East Asia. Despite their horticultural prominence, there is little information available regarding genetic diversity, population structure, relatedness, and subspecies origins of dogwood cultivars. In this study, 313 cultivars, wild-collected plants, and Rutgers University breeding selections, focusing on C. florida, C. kousa, and interspecific hybrids, were genotyped using restriction-site associated DNA sequencing (RADseq) generating thousands of single nucleotide polymorphism (SNP) and insertion deletion (Indel) markers. The research results showed high genetic diversity among C. florida and C. kousa wild-collected plants and cultivars. For C. florida, pink-bracted plants formed a distinct clade from those with white-bracts with the Mexican C. florida ssp. urbiniana forming an outgroup. For C. kousa, Chinese-collected plants (ssp. chinensis) were a distinct subspecies with clear separation from Japanese and Korean accessions (ssp. kousa) and cultivars were designated as ssp. chinensis, ssp. kousa, or ssp. hybrid. Using this information, a Kompetitive allele specific PCR (KASP) assay genotyping panel was designed to determine C. kousa trees’ subspecies makeup. Results revealed many cases of genetically identical cultivars being sold under different names, especially for pink-bracted cultivars of both species. Additionally, reported parent-progeny relationships were evaluated and either validated or discredited. Finally, the hybrid germplasm analysis validated pedigrees of interspecific F1 hybrids and found many of the recent Rutgers breeding selections contain small regions of pacific dogwood (C. nuttallii) DNA introgressed into C. kousa backgrounds. This diversity study elucidates origins, diversity, and relationships of a large population of big-bracted dogwoods. The results can inform plant breeders, arboreta, and the ornamental plant industry, as most modern cultivars and popular historic cultivars are represented.

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Population Genomics and Conservation of Copernicia alba: a Non-Timber Palm of Economic Importance in the Brazilian Chaco

Costa,

Marroquín,

de Araújo Batista

et al. 2023

Plant Mol Biol Rep

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Genetic diversity and population structure analysis of Franklinia alatamaha, a tree species existing only in cultivation

Cited by 5 publications

References 27 publications

Genetic diversity and population structure of a rare flowering tree endemic to Appalachia, Stewartia ovata

Genetic diversity and population structure of a rare flowering tree endemic to Appalachia, Stewartia ovata

Genetic diversity analysis of big-bracted dogwood (Cornus florida and C. kousa) cultivars, interspecific hybrids, and wild-collected accessions using RADseq

Population Genomics and Conservation of Copernicia alba: a Non-Timber Palm of Economic Importance in the Brazilian Chaco

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