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Genetic patterns in neotropical magnolias (Magnoliaceae) using de novo developed microsatellite markers

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Abstract
Conserving tree populations safeguards forests since they represent key elements of the ecosystem. The genetic characteristics underlying the evolutionary success of the tree growth form: high genetic diversity, extensive gene flow and strong species integrity, contribute to their survival in terms of adaptability. However, different biological and landscape contexts challenge these characteristics. This study employs 63 de novo developed microsatellite or SSR (Single Sequence Repeat) markers in different datasets of nine Neotropical Magnolia species. The genetic patterns of these protogynous, insect-pollinated tree species occurring in fragmented, highly-disturbed landscapes were investigated. Datasets containing a total of 340 individuals were tested for their genetic structure and degree of inbreeding. Analyses for genetic structure depicted structuring between species, i.e. strong species integrity. Within the species, all but one population pair were considered moderate to highly differentiated, i.e. no indication of extensive gene flow between populations. No overall correlation was observed between genetic and geographic distance of the pairwise species’ populations. In contrast to the pronounced genetic structure, there was no evidence of inbreeding within the populations, suggesting mechanisms favouring cross pollination and/or selection for more genetically diverse, heterozygous offspring. In conclusion, the data illustrate that the Neotropical Magnolias in the context of a fragmented landscape still have ample gene flow within populations, yet little gene flow between populations.
Keywords
Genetics, Magnoliaceae, Neotropics

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Chicago
Veltjen, Emily, Pieter Asselman, Majela Hernández Rodríguez, Alejandro Palmarola Bejerano, Ernesto Testé Lozano, Luis Roberto González Torres, Paul Goetghebeur, Isabel Larridon, and Marie-Stéphanie Samain. 2019. “Genetic Patterns in Neotropical Magnolias (Magnoliaceae) Using De Novo Developed Microsatellite Markers.” Heredity.
APA
Veltjen, E., Asselman, P., Hernández Rodríguez, M., Palmarola Bejerano, A., Testé Lozano, E., González Torres, L. R., Goetghebeur, P., et al. (2019). Genetic patterns in neotropical magnolias (Magnoliaceae) using de novo developed microsatellite markers. HEREDITY.
Vancouver
1.
Veltjen E, Asselman P, Hernández Rodríguez M, Palmarola Bejerano A, Testé Lozano E, González Torres LR, et al. Genetic patterns in neotropical magnolias (Magnoliaceae) using de novo developed microsatellite markers. HEREDITY. 2019;
MLA
Veltjen, Emily, Pieter Asselman, Majela Hernández Rodríguez, et al. “Genetic Patterns in Neotropical Magnolias (Magnoliaceae) Using De Novo Developed Microsatellite Markers.” HEREDITY (2019): n. pag. Print.
@article{8578761,
  abstract     = {Conserving tree populations safeguards forests since they represent key elements of the ecosystem. The genetic
characteristics underlying the evolutionary success of the tree growth form: high genetic diversity, extensive gene flow and strong species integrity, contribute to their survival in terms of adaptability. However, different biological and landscape contexts challenge these characteristics. This study employs 63 de novo developed microsatellite or SSR (Single Sequence Repeat) markers in different datasets of nine Neotropical Magnolia species. The genetic patterns of these protogynous, insect-pollinated tree species occurring in fragmented, highly-disturbed landscapes were investigated. Datasets containing a total of 340 individuals were tested for their genetic structure and degree of inbreeding. Analyses for genetic structure depicted structuring between species, i.e. strong species integrity. Within the species, all but one population pair were considered moderate to highly differentiated, i.e. no indication of extensive gene flow between populations. No overall correlation was observed between genetic and geographic distance of the pairwise species{\textquoteright} populations. In contrast to the pronounced genetic structure, there was no evidence of inbreeding within the populations, suggesting mechanisms favouring cross pollination and/or selection for more genetically diverse, heterozygous offspring. In conclusion, the data illustrate that the Neotropical Magnolias in the context of a fragmented landscape still have ample gene flow within populations, yet little gene flow between populations.},
  author       = {Veltjen, Emily and Asselman, Pieter and Hern{\'a}ndez Rodr{\'i}guez, Majela and Palmarola Bejerano, Alejandro and Test{\'e} Lozano, Ernesto and Gonz{\'a}lez Torres, Luis Roberto and Goetghebeur, Paul and Larridon, Isabel and Samain, Marie-St{\'e}phanie},
  issn         = {0018-067X},
  journal      = {HEREDITY},
  language     = {eng},
  title        = {Genetic patterns in neotropical magnolias (Magnoliaceae) using de novo developed microsatellite markers},
  url          = {http://dx.doi.org/10.1038/s41437-018-0151-5},
  year         = {2019},
}

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