{"refrec":{"BRefID":306730,"RR":"Goncalves, A.L.; García, M.V.; Heuertz, M.; González-Martínez, S.C. (2019). Demographic history and spatial genetic structure in a remnant population of the subtropical tree Anadenanthera colubrina var. cebil (Griseb.) Altschul (Fabaceae). Ann. For. Sci. 76: 18. https://dx.doi.org/10.1007/s13595-019-0797-z","BEntID":299056,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". Ann. For. Sci. 76: 18. https://dx.doi.org/10.1007/s13595-019-0797-z","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":1,"Authorstring":"Goncalves, A.L.; García, M.V.; Heuertz, M.; González-Martínez, S.C.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Goncalves, A.L. et al.","Englishabstract":"

Context

Information on fine-scale spatial genetic structure (FSGS) and demographic history is essential to determine which mechanisms are responsible for population persistence and evolution. This is particularly important in fragmented biomes, such as the seasonally dry tropical forests.

Aims

To assess the level of genetic diversity and population genetic structure in a remnant population of A. colubrina var. cebil, and to evaluate the influence of historical and contemporary environmental change on the genetic constitution of this population.

Methods

Eight microsatellites were typed in 60 adults and 59 saplings. The existence of (non-spatial) genetic clusters was evaluated using STRUCTURE and PCAs. FSGS was evaluated by kinship analyses and sPCA. MCMCglmm models were used to provide insights into factors underlying FSGS. Demographic history was studied using bottleneck statistics and approximate Bayesian computation.

Results

We found high levels of genetic diversity and high inbreeding. Genetic structure was stronger in saplings than in adult trees, probably due to assortative mating, and was not explained by altitude or DBH. Demographic analyses suggested an ancient population expansion.

Conclusion

Patterns of inbreeding and relatedness suggest a mixed mating system. High genetic diversity and moderate genetic structure suggest long-term population viability. High inbreeding suggests caution when using this stand as a source of material for reforestation.

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