GENETIC DIVERSITY AND MATING SYSTEM OF Rhizophora mangle L. (RHIZOPHORACEAE) IN NORTHERN BRAZIL REVEALED BY MICROSATELLITE ANALYSIS

Cerne

Endereço:
Departamento de Ciências Florestais, Universidade Federal de Lavras, Caixa Postal 3037
Lavras / MG
0
Site: http://www.dcf.ufla.br/cerne
Telefone: (35) 3829-1706
ISSN: 1047760
Editor Chefe: Gilvano Ebling Brondani
Início Publicação: 31/05/1994
Periodicidade: Trimestral

GENETIC DIVERSITY AND MATING SYSTEM OF Rhizophora mangle L. (RHIZOPHORACEAE) IN NORTHERN BRAZIL REVEALED BY MICROSATELLITE ANALYSIS

Ano: 2018 | Volume: 24 | Número: 4
Autores: Patrícia M. Francisco, Evandro V. Tambarussi, Fábio de M. Alves, Stephanie Bajay, Maisa Ciampi-Guillardi, Anete P. Souza
Autor Correspondente: Anete P. Souza | [email protected]

Palavras-chave: Brazilian Atlantic Forest, Conservation genetics, Microsatellite markers, Population genetics,Tropical tree species

Resumos Cadastrados

Resumo Inglês:

Rhizophora mangle L. (Rhizophoraceae) grows on aerial roots, which emerge above the water level, giving stands of this tree the characteristic “mangrove” appearance. To produce in situ and ex situ information for genetic conservation programs for this species, we investigated the genetic diversity and mating system of one R. mangle population. We sampled 30 adult trees and a total of 349 seeds in Northern Brazil. We genotyped all adult trees and seeds with four microsatellite loci. The average fi xation index was -0.222 for adult trees and 0.030 for seeds. The multilocus outcrossing rate (t m=0.921) was signifi cantly lower than unity (1.0). There was no substantial evidence of null alleles nor genotypic disequilibrium among the loci. The combined power to exclude the fi rst parent probability was 0.921. The average coancestry coeffi cient ( =0.180) was similar to that expected for half-sib progenies ( =0.125). Thus, the number of adult trees necessary for seed collection to obtain progeny arrays with an effective size of 150 was estimated to be 62. In conclusion, this study produced important information for the management and conservation of R. mangle and will contribute to conservation and management programs for this species.