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Contemporary gene flow, mating system, and spatial genetic structure in a jequitibá-rosa (Cariniana legalis Mart. Kuntze) fragmented population by microsatellite markers and parentage analysis

Grant number: 10/10704-7
Support type:Regular Research Grants
Duration: November 01, 2010 - October 31, 2012
Field of knowledge:Agronomical Sciences - Forestry Resources and Forestry Engineering
Principal Investigator:Alexandre Magno Sebbenn
Grantee:Alexandre Magno Sebbenn
Home Institution: Instituto Florestal. Secretaria do Meio Ambiente (São Paulo - Estado). São Paulo , SP, Brazil

Abstract

Jequitibá-rosa (Cariniana legalis Mart. O. Kuntze), the symbol tree of São Paulo state, is one of the largest trees of the Atlantic Forest. The species is endemic to Brazil and occur in low population density (< 1 tree/ha). However, the Atlantic Forest was intensively fragmented in the last centuries, and today remains only between 11 to 16% of the original forest. Forest fragmentation isolate and to decrease the size of the population and, consequently, affects the gene flow among populations and can increase the selfing rate, correlated matings, intra-population spatial genetic structure and the relatedness and inbreeding in descend generations. Due to this, studies of the effects of forest fragmentation on gene flow by pollen and seeds, mating system and spatial genetic structure are very important to understand the impacts of forest fragmentation on populations and to design strategies for in situ and ex situ conservation of the species. Microsatellite markers are very suitable for these studies due their very high polymorphism, in terms of number of alleles. Within this contest, in this study, we will investigate the contemporary pollen and seed flow, mating system and spatial genetic structure of a small fragmented population of C. legalis, located in the Estação Ecológica de Ibicatú-SP, Brazil. For to do this, all adult trees and about 300 seedlings will be mapped, measured (diameter and height), sampled and genotyped for eight microsatellite loci. Six-hundred open-pollinated seeds from 12 seed-trees will also be sampled. This study will produce valuable information's for management of fragmented populations of the species, contributing for breeding, conservation and reforestation plans. (AU)

Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
TAMBARUSSI, EVANDRO VAGNER; BOSHIER, DAVID; VENCOVSKY, ROLAND; MENEZES FREITAS, MIGUEL LUIZ; SEBBENN, ALEXANDRE MAGNO. Inbreeding depression from selfing and mating between relatives in the Neotropical tree Cariniana legalis Mart. Kuntze. CONSERVATION GENETICS, v. 18, n. 1, p. 225-234, FEB 2017. Web of Science Citations: 14.
TAMBARUSSI, E. V.; BOSHIER, D. H.; VENCOVSKY, R.; FREITAS, M. L. M.; DI-DIO, O. J.; SEBBENN, A. M. Several small: how inbreeding affects conservation of Cariniana legalis Mart. Kuntze (Lecythidaceae) the Brazilian Atlantic Forest's largest tree. INTERNATIONAL FORESTRY REVIEW, v. 18, n. 4, p. 502-510, 2016. Web of Science Citations: 8.
TAMBARUSSI, EVANDRO V.; BOSHIER, DAVID; VENCOVSKY, ROLAND; FREITAS, MIGUEL L. M.; SEBBENN, ALEXANDRE M. Paternity analysis reveals significant isolation and near neighbor pollen dispersal in small Cariniana legalis Mart. Kuntze populations in the Brazilian Atlantic Forest. ECOLOGY AND EVOLUTION, v. 5, n. 23, p. 5588-5600, DEC 2015. Web of Science Citations: 9.
TAMBARUSSI, EVANDRO VAGNER; SEBBENN, ALEXANDRE MAGNO; MORENO, MARIA ANDREIA; FERRAZ, ELZA MARTINS; KAGEYAMA, PAULO YOSHIO; VENCOVSKY, ROLAND. MICROSATELLITE MARKERS FOR CARINIANA LEGALIS (LECYTHIDACEAE) AND THEIR TRANSFERABILITY TO C. ESTRELLENSIS. APPLICATIONS IN PLANT SCIENCES, v. 1, n. 6 JUN 2013. Web of Science Citations: 8.
TAMBARUSSI, E. V.; VENCOVSKY, R.; FREITAS, M. L. M.; SEBBENN, A. M. Mendelian inheritance, genetic linkage, and genotypic disequilibrium at nine microsatellite loci of Cariniana legalis (Mart.) O. Kuntze. Genetics and Molecular Research, v. 12, n. 4, p. 5442-5457, 2013. Web of Science Citations: 8.

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