Microsatellites and chloroplast genome sequences of the mangrove (<em>Avicennia marina</em>) from Western Indian Ocean

Avicennia marina (Forssk.) Vierh is considered the most widely distributed mangrove species and a major constituent of Indo-West Pacific mangroves. To understand spatial patterns of genetic diversity in this species, and the role of ocean currents and historical events in shaping these patterns, we examined population genetic structure, maternal phylogeography, and colonization history across the species’ Western Indian Ocean range. The data sets include samples from&nbsp; 34 populations of Kenya, Tanzania, Mozambique, South Africa, Madagascar, Mayotte Island, Europa Island, Aldabra atoll, and the Granitic Seychelles + outgroups of the Red Sea and Southeast Asia. The data set includes 1,150 genotyped trees using 18 nuclear microsatellites for conducting population genetic analyses, including structure, migrate, barrier, and Bayesian origin models. The data set also includes 50 chloroplast sequences (+ 1 reference) of a nearly complete genome (at least one individual from each population..., Study area and sampling A total of 1079 individuals of Avicennia marina from natural mangrove forests were collected in 34 locations of the West Indian Ocean (WIO), of which 22 were located along the continental eastern African coastline from a northernmost site in Lamu, Kenya, to the species' southern range limit site of Wavecrest, South Africa. Twelve populations were located on Madagascar, Europa Island, Comores (Mayotte Island), the Aldabra atoll, and the granitic Seychelles (Mahé, St. Pierre, and Curieuse island). For comparative reasons only and as an outgroup in diverse analyses, we considered an additional 71 individual trees outside the WIO from a Red Sea population (Saudi Arabia), the East Indian Ocean (western Malaysian Peninsula), and the East Sea (northern Vietnam). For NGS-based chloroplast genome assemblage, a subset of 50 individuals, at least one from each population, was used and included 2 individuals from extra WIO sites (Ile St Marie in East Madagascar and Nahoon in..., # Microsatellites and chloroplast genome sequences of the mangrove (*Avicennia marina*) from Western Indian Ocean Dataset DOI: [10.5061/dryad.hmgqnk9wr](10.5061/dryad.hmgqnk9wr) ## Description of the data and file structure ### Description of the data and file structure **Microsatellite_data_Avicennia_marina_Western_Indiean_Ocean.csv** *Avicennia marina* microsatellite scores are provided in GenAlex format: * A1 = number of microsatellite loci * B1 = total number of individuals * C1 = total number of populations * D1 to AN1 = number of individuals within each of the 37 populations * D2 to AN2 = Locality names * D3 to AN3 = Population codes * C4 to AL4 = names of 18 microsatellite loci * From row 5 onwards: Column A = individual sample codes; B = population codes; C to AL = length of microsatellite allele (biallelic) for each microsatellite locus. Zero values are missing values. Population names and codes are exactly as in TRIEST et al. 2026 Diversity and Distributions, DOI: 10....,