Browsing by Autor "Alexandre Magno Sebbenn"

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Development of a set of SNP markers for population genetics studies of Ipe (Handroanthus sp.), a valuable tree genus from Latin America
(Springer Science+Business Media, 2017) Barbara Rocha Venâncio Meyer-Sand; Céline Blanc-Jolivet; Malte Mäder; Kathelyn Paredes-Villanueva; Niklas Tysklind; Alexandre Magno Sebbenn; Erwan Guichoux; Бернд Деген
Development of nuclear and plastid SNP and INDEL markers for population genetic studies and timber traceability of Carapa species
(Springer Science+Business Media, 2019) Niklas Tysklind; Céline Blanc-Jolivet; Malte Mäder; Barbara Rocha Venâncio Meyer-Sand; Kathelyn Paredes-Villanueva; Eurídice N. Honorio Coronado; Carmen Rosa GARCÍA-DÁVILA; Alexandre Magno Sebbenn; Henri Caron; Valérie Troispoux
Development of nuclear and plastid SNP markers for genetic studies of Dipteryx tree species in Amazonia
(Springer Science+Business Media, 2019) Eurídice N. Honorio Coronado; Céline Blanc-Jolivet; Malte Mäder; Carmen Rosa GARCÍA-DÁVILA; Alexandre Magno Sebbenn; Barbara Rocha Venâncio Meyer-Sand; Kathelyn Paredes-Villanueva; Niklas Tysklind; Valérie Troispoux; Marie Massot
Gene flow in an overexploited population of Swietenia macrophylla King (Meliaceae) in the Bolivian Amazon
(De Gruyter Open, 2012) Alexandre Magno Sebbenn; Juan Carlos Licona; Bonifacio Mostacedo; Бернд Деген
Abstract Pollen and seed movement among and within populations connect individuals and populations, and therefore are among the most important evolutionary processes determining the genetic structure of populations. Seven microsatellite loci were used to investigate the realized pollen dispersal and intra-population spatial genetic structure (SGS) in four permanent plots located in an overexploited big-leaf mahogany (Swietenia macrophylla King) population in the Bolivian Amazon. All adult trees found in the plots were mapped, sampled and genotyped. Seedlings were sampled below the canopy of reproductive trees. Private alleles in the sub-population of the adults and the seedlings were observed. The observed heterozygosity was significantly lower and fixation index was significantly higher for the seedlings (H o =0.697, F=0.068) compared to the adults (H o =0.761, F=-0.023). In one plot, seed immigration was observed (18%). Realized pollen immigration ranged among the plots from zero to 41% and selfing ranged from zero to 5.8%. We observed an average pollen dispersal distance from 75 to 255 m, with the maximum reaching 576 m. We found a significant SGS up to 150 m, showing that near neighbour individuals are relatives. The observed data on pollen- and seed dispersal provides important information for the sustainable management of the endangered mahogany species.
Nuclear and chloroplastic SNP markers for genetic studies of timber origin for Hymenaea trees
(Springer Science+Business Media, 2018) Camila Lucas Chaves; Céline Blanc-Jolivet; Alexandre Magno Sebbenn; Malte Mäder; Barbara Rocha Venâncio Meyer-Sand; Kathelyn Paredes-Villanueva; Eurídice N. Honorio Coronado; Carmen Rosa GARCÍA-DÁVILA; Niklas Tysklind; Valérie Troispoux
Nuclear and plastid SNP markers for tracing Cedrela timber in the tropics
(Springer Science+Business Media, 2019) Kathelyn Paredes-Villanueva; Céline Blanc-Jolivet; Malte Mäder; Eurídice N. Honorio Coronado; Carmen Rosa GARCÍA-DÁVILA; Alexandre Magno Sebbenn; Barbara Rocha Venâncio Meyer-Sand; Henri Caron; Niklas Tysklind; Stephen Cavers
Nuclear and plastidial SNP and INDEL markers for genetic tracking studies of Jacaranda copaia
(Springer Science+Business Media, 2019) Alexandre Magno Sebbenn; Céline Blanc-Jolivet; Malte Mäder; Barbara Rocha Venâncio Meyer-Sand; Kathelyn Paredes-Villanueva; Eurídice N. Honorio Coronado; Carmen Rosa GARCÍA-DÁVILA; Niklas Tysklind; Valérie Troispoux; Adline Delcamp
SNP Markers as a Successful Molecular Tool for Assessing Species Identity and Geographic Origin of Trees in the Economically Important South American Legume Genus<i>Dipteryx</i>
(Oxford University Press, 2020) Eurídice Honorio N. Coronado; Céline Blanc-Jolivet; Malte Mäder; Carmen Rosa GARCÍA-DÁVILA; David Aldana Gomero; Dennis Del Castillo Torres; Gerardo Flores Llampazo; Gabriel Hidalgo Pizango; Alexandre Magno Sebbenn; Barbara Rocha Venâncio Meyer-Sand
Dipteryx timber has been heavily exploited in South America since 2000s due to the increasing international demand for hardwood. Developing tools for the genetic identification of Dipteryx species and their geographical origin can help to promote legal trading of timber. A collection of 800 individual trees, belonging to 6 different Dipteryx species, was genotyped based on 171 molecular markers. After the exclusion of markers out of Hardy-Weinberg equilibrium or with no polymorphism or low amplification, 83 nuclear, 29 chloroplast, 13 mitochondrial single nucleotide polymorphisms (SNPs), and 2 chloroplast and 5 mitochondrial INDELS remained. Six genetic groups were identified using Bayesian Structure analyses of the nuclear SNPs, which corresponded to the different Dipteryx species collected in the field. Seventeen highly informative markers were identified as suitable for species identification and obtained self-assignment success rates to species level of 78-96%. An additional set of 15 molecular markers was selected to determine the different genetic clusters found in Dipteryx odorata and Dipteryx ferrea, obtaining self-assignment success rates of 91-100%. The success to assign samples to the correct country of origin using all or only the informative markers improved when using the nearest neighbor approach (69-92%) compared to the Bayesian approach (33-80%). While nuclear and chloroplast SNPs were more suitable for differentiating the different Dipteryx species, mitochondrial SNPs were ideal for determining the genetic clusters of D. odorata and D. ferrea. These 32 selected SNPs will be invaluable genetic tools for the accurate identification of species and country of origin of Dipteryx timber.
Timber tracking of Jacaranda copaia from Amazon Forest using DNA fingerprint
(2024) Alexandre Magno Sebbenn; Lorena Frigini Moro Capo; Бернд Деген; Céline Blanc-Jolivet; Malte Mäder; Stephen Cavers; Kathelyn Paredes-Villanueva; Eurídice Honorio-Conorado; Carmen Rosa GARCÍA-DÁVILA; Niklas Tysklind
Amazon tropical forest is actually subject to strong deforestation, generally originated from illegal logging, resulting in ecological, environmental and economic problems. Aiming stop deforestation and timber commercialization of illegal logging of tropical forest, new laws has been introduced in many countries. Here we investigated the utility of DNA fingerprinting of nuclear and cytoplasmatic SNPs to timber tracking the intensive logged and commercialized of the Amazonian Neotropical tree Jacaranda copaia. Samples of 832 individuals from 43 populations from Bolivia, Brazil, French Guiana, and Peru were used to investigate the power of 113 nuclear SNPs, 11 CpSNPs, and four MtSNP loci to determine the country and population origin. The genetic differentiation among all populations and contries was high (0.233&ndash;0.942), specialy for CpMtSNP (generally&gt;0.6) loci, and there is a strong isolation by distance pathern among populations, favoring the group or individual samples tracking to correct site. For self-assignment tests, we were able to 100% correct determine country and population origin of all samples using all SNPs. Our results show that the use of 128 SNP markers is suitable to correct determination of country and population site of J. copaia timber origin and very useful tool for customs and local and international policies.