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Guan B, Gao J, Chen W, Gong X, Ge G. The Effects of Climate Change on Landscape Connectivity and Genetic Clusters in a Small Subtropical and Warm-Temperate Tree. FRONTIERS IN PLANT SCIENCE 2021; 12:671336. [PMID: 34858443 PMCID: PMC8631755 DOI: 10.3389/fpls.2021.671336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Climate change is a great threat to global biodiversity and has resulted in serious ecological consequences. Although the potential effects of climate change on genetic diversity have recently received much research attention, little research has focused on the impacts of climate change on genetic connectivity and the relationship between climate stability and genetic divergence. Here, we combined population connectivity with genetic data to predict the impacts of future climate change on genetic connectivity. Coupled with climatic variables and genetic data, we used POPS software to create spatially explicit simulations and predict the dynamics in genetic clusters in response to climate changes. A generalized additive model was employed to test the correlation between climatic stability and genetic diversification. Our findings indicated that a reduction in species distribution due to severe climate change would lead to a substantial loss of genetic connectivity. More severe future climatic scenarios would likely cause greater loss of variability or more distinct homogenization in genetic variation of species. Relatively low interpolated genetic distances are generally associated with areas of greater losses in climatic suitability from the present to the future. The displacement of climatic genetic clusters will challenge species adaptation to future climate change because of the loss of fundamental evolutionary potential. The persistence capacity of plant species may be weakened in the face of future climate change.
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Affiliation(s)
- Bicai Guan
- College of Life Sciences, Nanchang University, Nanchang, China
| | | | | | | | - Gang Ge
- College of Life Sciences, Nanchang University, Nanchang, China
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Nowicki M, Houston LC, Boggess SL, Aiello AS, Payá‐Milans M, Staton ME, Hayashida M, Yamanaka M, Eda S, Trigiano RN. Species diversity and phylogeography of Cornus kousa (Asian dogwood) captured by genomic and genic microsatellites. Ecol Evol 2020; 10:8299-8312. [PMID: 32788980 PMCID: PMC7417245 DOI: 10.1002/ece3.6537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 06/09/2020] [Indexed: 01/01/2023] Open
Abstract
Cornus kousa (Asian dogwood), an East Asia native tree, is the most economically important species of the dogwood genus, owing to its desirable horticultural traits and ability to hybridize with North America-native dogwoods. To assess the species genetic diversity and to better inform the ongoing and future breeding efforts, we assembled an herbarium and arboretum collection of 131 noncultivated C. kousa specimens. Genotyping and capillary electrophoresis analyses of our C. kousa collection with the newly developed genic and published nuclear genomic microsatellites permitted assessment of genetic diversity and evolutionary history of the species. Regardless of the microsatellite type used, the study yielded generally similar insights into the C. kousa diversity with subtle differences deriving from and underlining the marker used. The accrued evidence pointed to the species distinct genetic pools related to the plant country of origin. This can be helpful in the development of the commercial cultivars for this important ornamental crop with increased pyramided utility traits. Analyses of the C. kousa evolutionary history using the accrued genotyping datasets pointed to an unsampled ancestor population, possibly now extinct, as per the phylogeography of the region. To our knowledge, there are few studies utilizing the same gDNA collection to compare performance of genomic and genic microsatellites. This is the first detailed report on C. kousa species diversity and evolutionary history inference.
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Affiliation(s)
- Marcin Nowicki
- Department of Entomology and Plant PathologyThe University of TennesseeKnoxvilleTNUSA
| | - Logan C. Houston
- Department of Entomology and Plant PathologyThe University of TennesseeKnoxvilleTNUSA
| | - Sarah L. Boggess
- Department of Entomology and Plant PathologyThe University of TennesseeKnoxvilleTNUSA
| | | | - Miriam Payá‐Milans
- Department of Entomology and Plant PathologyThe University of TennesseeKnoxvilleTNUSA
- Present address:
Centro de Biotecnología y Genómica de PlantasUPM‐INIAMadridSpain
| | - Margaret E. Staton
- Department of Entomology and Plant PathologyThe University of TennesseeKnoxvilleTNUSA
| | | | - Masahiro Yamanaka
- Department of Pharmaceytical SciencesInternational University of Health and WelfareOhtawaraJapan
| | - Shigetoshi Eda
- Department of Forestry, Wildlife and FisheriesCenter for Wildlife Health ORUKnoxvilleTNUSA
- Department of MicrobiologyCenter for Wildlife Health ORUKnoxvilleTNUSA
| | - Robert N. Trigiano
- Department of Entomology and Plant PathologyThe University of TennesseeKnoxvilleTNUSA
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Nowicki M, Boggess SL, Saxton AM, Hadziabdic D, Xiang QYJ, Molnar T, Huff ML, Staton ME, Zhao Y, Trigiano RN. Haplotyping of Cornus florida and C. kousa chloroplasts: Insights into species-level differences and patterns of plastic DNA variation in cultivars. PLoS One 2018; 13:e0205407. [PMID: 30352068 PMCID: PMC6198962 DOI: 10.1371/journal.pone.0205407] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 09/25/2018] [Indexed: 01/08/2023] Open
Abstract
Chloroplast DNA is a part of plant non-nuclear genome, and is of particular interest for lineage studies. Moreover, the non-coding regions of cpDNA display higher mutation rates than the conserved coding cpDNA, which has been employed for phylogenetic and population research. We analyzed the cpDNA of 332 gDNA samples from collections of Cornus florida and C. kousa (commercial cultivars, breeding selections, and wild kousa accessions from Asia), using the chlorotyping system developed on North America-native, wild accessions of C. florida. Our results indicated significant differences in chlorotype frequencies between the two species. Cornus florida samples were represented by all major chlorotypes previously described, whereas all C. kousa samples analyzed had only one of the chlorotype patterns shown by C. florida. The chlorotyping analytic panel was then expanded by sequencing the targeted three non-coding cpDNA regions. Results indicated a major difference in the maternally-inherited cpDNA between the two closely related Big-Bracted Cornus species. Chlorotype diversity and differences in the proportion of informative sites in the cpDNA regions of focus emphasized the importance of proper loci choice for cpDNA-based comparative studies between the closely related dogwood species. Phylogenetic analyses of the retrieved sequences for the other species of Cornus provided information on the relative utility of the cpDNA regions studied and helped delineate the groups (Big-Bracted, Cornelian Cherries, Blue/White-Fruited) within the genus. Genealogical relationships based on the cpDNA sequences and the inferred chlorotype networks indicated the need for continued analyses across further non-coding cpDNA regions to improve the phylogenetic resolution of dogwoods.
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Affiliation(s)
- Marcin Nowicki
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, TN, United States of America
| | - Sarah L. Boggess
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, TN, United States of America
| | - Arnold M. Saxton
- Department of Animal Science, The University of Tennessee, Knoxville, TN, United States of America
| | - Denita Hadziabdic
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, TN, United States of America
| | - Qiu-Yun Jenny Xiang
- Department of Plant and Microbial Biology, North Carolina State University Raleigh, NC, United States of America
| | - Thomas Molnar
- Department of Plant Biology Rutgers, The State University of New Jersey, New Brunswick, NJ, United States of America
| | - Matthew L. Huff
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, TN, United States of America
| | - Margaret E. Staton
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, TN, United States of America
| | - Yichen Zhao
- Guizhou Key Laboratory of Agro-Bioengineering, Guizhou University, Huaxi, Guiyang, PRC
| | - Robert N. Trigiano
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, TN, United States of America
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