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Csilléry, K.; Lalague, H.; Vendramin, G.G.; González-Martínez, S.C.; Fady, B.; Oddou-Muratorio, S. |
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Detecting short spatial scale local adaptation and epistatic selection in climate-related candidate genes in European beech (Fagus sylvatica) populations |
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Journal Article |
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2014 |
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Molecular Ecology |
Abbreviated Journal |
Molecular Ecology |
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23 |
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19 |
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4696-4708 |
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abiotic stress; budburst phenology; FST outlier; gene network; haplotype; Ohta's test; variance components of linkage disequilibrium |
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Detecting signatures of selection in tree populations threatened by climate change is currently a major research priority. Here, we investigated the signature of local adaptation over a short spatial scale using 96 European beech (Fagus sylvatica L.) individuals originating from two pairs of populations on the northern and southern slopes of Mont Ventoux (south-eastern France). We performed both single and multilocus analysis of selection based on 53 climate-related candidate genes containing 546 SNPs. FST outlier methods at the SNP level revealed a weak signal of selection, with three marginally significant outliers in the northern populations. At the gene level, considering haplotypes as alleles, two additional marginally significant outliers were detected, one on each slope. To account for the uncertainty of haplotype inference, we averaged the Bayes factors over many possible phase reconstructions. Epistatic selection offers a realistic multilocus model of selection in natural populations. Here, we used a test suggested by Ohta based on the decomposition of the variance of linkage disequilibrium. Overall populations, 0.23% of the SNP pairs (haplotypes) showed evidence of epistatic selection, with nearly 80% of them being within genes. One of the between gene epistatic selection signals arose between an FST outlier and a nonsynonymous mutation in a drought response gene. Additionally, we identified haplotypes containing selectively advantageous allele combinations which were unique to high or low elevations and northern or southern populations. Several haplotypes contained nonsynonymous mutations situated in genes with known functional importance for adaptation to climatic factors. |
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CIFOR-INIA, Forest Research Centre, Carretera de La Coruña km 7.5Madrid 28040, Spain |
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Export Date: 13 January 2015 |
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EcoFoG @ webmaster @ |
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579 |
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Vincent, G.; Weissenbacher, E.; Sabatier, D.; Blanc, L.; Proisy, C.; Couteron, P. |
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Detection des variations de structure de peuplements en foret dense tropicale humide par lidar aeroporte |
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Journal Article |
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2010 |
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Revue Francaise de Photogrammetrie et de Teledetection |
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Rev. Fr. Photogramm. Teledetect. |
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191 |
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42-51 |
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Above-ground biomass estimation; Canopy height model; Stem diameter distribution; Tropical moist forest; Above ground biomass; Above ground level; Airborne LiDAR; Basal area; Canopy Height Models; Carbon stocks; Characterisation; Classical fields; Coefficient of variation; Diameter distributions; Digital terrain model; Flooded areas; Forest ecology; Forest structure; Forest type; High spatial resolution; Individual tree; LIDAR data; Light detection and ranging; Local statistics; Long term; Management issues; Natural forests; Natural variation; Pearson correlation coefficients; Quadratic mean diameter; Soil characteristics; Soil cover; Spatial changes; Spatial resolution; Stem density; Stem diameter; Stem height; Strong correlation; Tree height; Tropical moist forest; Tropical rain forest; Vegetation structure; Vertical accuracy; Water regime; Discriminant analysis; Ecology; Optical radar; Remote sensing; Soils; Statistics; Stem cells; Temperature control; Tropics; Vegetation; Forestry; Biomass; Discriminant Analysis; Ecology; Forest Canopy; Forestry; Radar; Remote Sensing; Stems; Temperature Control; Tropical Atmospheres |
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Characterisation of forest structure is a major stake for forestry, species conservation, carbon stock estimates and many forest ecology and management issues. At large scale natural forest structure tends to vary according to climate and geomorphomology (Paget, 1999; Steege et al., 2006) while soil characteristics (and notably water regime) and syMgenetic stage add some finer scale variation (Oldeman, 1989; Sabatier et al., 1997). Forest structure characterisation traditionally relies on field-based collection of individual tree dimensions such as stem diameter and stem height sampled across tracks of forest (Hall et al., 1998). However, such field intensive methods are costly, and of low accuracy regarding measures of tree heights. Airborne light detection and ranging (LiDAR) technology provides horizontal and vertical Information at high spatial resolutions and vertical accuracies (Lim et al., 2003; Hyyppä et al., 2004). It has the potential for gathering vegetation structure data over large areas rapidly at moderate cost and hence is of particular relevance for poorly sampled, difficult to access and largely unexplored tropical rainforests. In this study we examined the ability of airborne LiDAR to detect spatial changes in the structure of dense tropical rain forest and we probed this remote sensing approach against local statistics derived from stem diameters (i.e. classical field data information) mapped across a large track of forest at a long term experimental site in French Guyana. The large variability in forest structure occurring at the experimental site is du to natural variation of the soil cover (and notably drainage properties) combined with various logging intensities applied 15 years before the LiDAR data were acquired. On this basis ten different forest types were identified at the site (figure 1 and 3). Various stem based statistics were computed for a series of meshes with cells ranging from 30 by 30 m plots to 250 by 250 m plots. These statistics included basal area, stem density, quadratic mean diameter, and diameter distribution percentiles. Similarly local statistics were extracted either from the Canopy Height Model (e.g. median height, mean height, standard height deviation, height coefficient of variation, height percentiles, frequency of hits below 5 m above ground level). Additionally a wetness index (Böhner et al., 2002) was computed at each node of a 5 by 5 m grid from the Digital Terrain Model also extracted from the LiDAR data set. We used both types of cell statistics to discriminate the various forest types. Comparison between the two approaches for a range of spatial resolution is available from in table 1. Results indicate that LiDAR based statistics are essentially as powerful as field based statistics to discriminate forest types at coarse scale. This reflects the very strong correlation between the CHM and the field based stem diameter data. For example (figure 5) the Pearson correlation coefficient between median height and quadratic mean diameter for cells of 125 by 125 m is 0.945 (n=0.72). When a finer resolution is required however as for the detection of seasonally flooded bottomland forest along thalwegs, then LiDAR technology proves more efficient than field based inventories as it combines information from the DTM and the CHM. The wetness index alone correctly retrieves about 2 thirds of the seasonally flooded areas. All in all, discriminant analysis performance of the LiDAR derived information approaches 80% when classifying forests cover at the finest scale of 5 by 5m into 10 different types and reaches 87% when a coarser classification Into 6 forest types is considered (figure 4). |
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IRD, UMR AMAP, Montpellier, France |
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17689791 (Issn) |
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Cited By (since 1996): 1; Export Date: 21 October 2011; Source: Scopus; Language of Original Document: French; Correspondence Address: Vincent, G.; IRD, UMR AMAP, Kourou – BP 701 (CIRAD) 97387 Kourou cedex -Guyane, France |
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EcoFoG @ webmaster @ |
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351 |
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Scotti-Saintagne, C.; Bodenes, C.; Barreneche, T.; Bertocchi, E.; Plomion, C.; Kremer, A. |
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Detection of quantitative trait loci controlling bud burst and height growth in Quercus robur L |
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2004 |
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Theoretical and Applied Genetics |
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Theor. Appl. Genet. |
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109 |
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8 |
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1648-1659 |
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Genetic variation of bud burst and early growth components was estimated in a full-sib family of Quercus robur L. comprising 278 offspring. The full sibs were vegetatively propagated, and phenotypic assessments were made in three field tests. This two-generation pedigree was also used to construct a genetic linkage map (12 linkage groups, 128 markers) and locate quantitative trait loci (QTLs) controlling bud burst and growth components. In each field test, the date of bud burst extended over a period of 20 days from the earliest to the latest clone. Bud burst exhibited higher heritability (0.15-0.51) than growth components (0.04-0.23) and also higher correlations across field tests. Over the three tests there were 32 independent detected QTLs (Pless than or equal to5% at the chromosome level) controlling bud burst, which likely represent at least 12 unique genes or chromosomal regions controlling this trait. QTLs explained from 3% to 11% of the variance of the clonal means. The number of QTLs controlling height growth components was lower and varied between two and four. However the contribution of each QTL to the variance of the clonal mean was higher (from 4% to 19%). These results indicate that the genetic architecture of two important fitness-related traits are quite different. On the one hand, bud burst is controlled by several QTLs with rather low to moderate effects, but contributing to a high genetic (additive) variance. On the other hand, height growth depends on fewer QTLs with moderate to strong effects, resulting in lower heritabilities of the trait. |
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INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: antoine.kremer@pierroton.inra.fr |
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SPRINGER |
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0040-5752 |
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ISI:000225054800012 |
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EcoFoG @ eric.marcon @ |
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260 |
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Ramalho, M.O.; Duplais, C.; Orivel, J.; Dejean, A.; Gibson, J.C.; Suarez, A.V.; Moreau, C.S. |
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Development but not diet alters microbial communities in the Neotropical arboreal trap jaw ant Daceton armigerum: an exploratory study |
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2020 |
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Scientific Reports |
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10 |
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1 |
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7350 |
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To better understand the evolutionary significance of symbiotic interactions in nature, microbiome studies can help to identify the ecological factors that may shape host-associated microbial communities. In this study we explored both 16S and 18S rRNA microbial communities of D. armigerum from both wild caught individuals collected in the Amazon and individuals kept in the laboratory and fed on controlled diets. We also investigated the role of colony, sample type, development and caste on structuring microbial communities. Our bacterial results (16S rRNA) reveal that (1) there are colony level differences between bacterial communities; (2) castes do not structure communities; (3) immature stages (brood) have different bacterial communities than adults; and 4) individuals kept in the laboratory with a restricted diet showed no differences in their bacterial communities from their wild caught nest mates, which could indicate the presence of a stable and persistent resident bacterial community in this host species. The same categories were also tested for microbial eukaryote communities (18S rRNA), and (5) developmental stage has an influence on the diversity recovered; (6) the diversity of taxa recovered has shown this can be an important tool to understand additional aspects of host biology and species interactions. |
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2045-2322 |
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EcoFoG @ webmaster @ Ramalho2020 |
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929 |
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Meyer-Sand, B.R.V.; Blanc-Jolivet, C.; Mader, M.; Paredes-Villanueva, K.; Tysklind, N.; Sebbenn, A.M.; Guichoux, E.; Degen, B. |
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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 |
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Journal Article |
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2018 |
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Conservation Genetics Resources |
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Conserv. Gen. Res. |
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10 |
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4 |
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779-781 |
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Handroanthus sp; MassARRAY; Single nucleotide polymorphism |
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A combination of restriction associated DNA sequencing (RADSeq) and low coverage MiSeq genome sequencing was used for the development of single nucleotide polymorphisms (SNP) and INDEL (insertion/deletions) genetic markers for Ipe (Handroanthus sp.). Of the 402 putative loci identified, 389 SNPs and INDELs (315 nuclear SPNs, six chloroplast INDELs, 15 chloroplast SNPs, 12 mitochondrial INDELs and 41 mitochondrial SNPs) were successfully genotyped at 93 individuals from Brazil, Bolivia and French Guiana using a MassARRAY® iPLEX™ platform. This set of markers will be invaluable for population genetics, phylogeography and DNA fingerprinting studies. © 2017, Springer Science+Business Media B.V., part of Springer Nature. |
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Plateforme Génome Transcriptome de Bordeaux, INRA Pierroton, Bâtiment Artiga, 69 route d’Arcachon, Cestas, 33610, France |
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Springer Netherlands |
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18777252 (Issn) |
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Export Date: 12 November 2018; Correspondence Address: Blanc-Jolivet, C.; Thünen Institute of Forest Genetics, Sieker Landstrasse 2, Germany; email: celine.blanc-jolivet@thuenen.de; References: Blanc-Jolivet, C., Kersten, B., Bourland, N., Guichoux, E., Delcamp, A., Doucet, J.-L., Degen, B., Development of nuclear SNP markers for the timber tracking of the African tree species Sapelli, Entandrophragma cylindricum (2017) Conserv Genet Resour; Blanc-Jolivet, C., Kersten, B., Daïnou, K., Hardy, O., Guichoux, E., Delcamp, A., Degen, B., Development of nuclear SNP markers for genetic tracking of Iroko, Milicia excelsa and Milicia regia (2017) Conserv Genet Resour; Braga, A.C., Reis, A.M.M., Leoi, L.T., Pereira, R.W., Collevatti, R.G., Development and characterization of microsatellite markers for the tropical tree species Tabebuia aurea (Bignoniaceae) (2007) Mol Ecol Notes, 7, pp. 53-56. , COI: 1:CAS:528:DC%2BD2sXis1Sjuro%3D; Dumolin, S., Demesure, B., Pettit, R., Inheritance of chloroplast and mitochondrial genomes in pedunculate oak investigated with an efficient PCR method (1995) Theor Appl Genet, 91, pp. 1253-1256. , COI: 1:CAS:528:DyaK28XhsFKmsLo%3D; Goudet, J., Fstat (Version 2.9.3.2.): a computer program to calculate F-statistics (2002) J Heredity, 86, pp. 485-486; Grose, S.O., Olmstead, R.G., Evolution of a charismatic neotropical clade: molecular phylogeny of Tabebuia s. L crescentieae, and allied genera (Bignoniaceae) (2007) Syst Bot, 32, pp. 650-659; Jardine, D.I., Blanc-Jolivet, C., Dixon, R.R.M., Dormontt, E.E., Dunker, B., Gerlach, J., Development of SNP markers for Ayous (Triplochiton scleroxylon K. Schum) an economically important tree species from tropical West and Central Africa (2016) Conserv Genet Resour, 8 (2), pp. 129-139; Miller, M.R., Dunham, J.P., Amores, A., Cresko, W.A., Johnson, E.A., Rapid and cost-effective polymorphism identification and genotyping using restriction site associated DNA (RAD) markers (2007) Genome Res, 17, pp. 240-248. , COI: 1:CAS:528:DC%2BD2sXhsFKis7w%3D; Pakull, B., Mader, M., Kersten, B., Ekue, M.R.M., Dipelet, U.G.B., Paulini, M., Development of nuclear, chloroplast and mitochondrial SNP markers for Khaya sp (2016) Conserv Genet Resour, 8 (3), pp. 283-297; Schulze, M., Grogan, J., Uhl, C., Lentini, M., Vidal, E., Evaluating Ipê (Tabebuia, Bignoniaceae) logging in amazonia: Sustainable management or catalyst for forest degradation? (2008) Biol Conserv, 141, pp. 2071-2085; Straub, S.C., Parks, M., Weitemier, K., fishbein, M., Cronn, R.C., Liston, A., Navigating the tip of the genomic iceberg: next-generation sequencing for plant systematics (2012) Am J Bot, 99, pp. 349-364. , COI: 1:CAS:528:DC%2BC38XksValtbo%3D |
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EcoFoG @ webmaster @ |
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832 |
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Tysklind, N.; Blanc-Jolivet, C.; Mader, M.; Meyer-Sand, B.R.V.; Paredes-Villanueva, K.; Honorio Coronado, E.N.; García-Dávila, C.R.; Sebbenn, A.M.; Caron, H.; Troispoux, V.; Guichoux, E.; Degen, B. |
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Development of nuclear and plastid SNP and INDEL markers for population genetic studies and timber traceability of Carapa species |
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2019 |
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Conservation Genetics Resources |
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Conserv. Gen. Res. |
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11 |
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3 |
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337-339 |
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Carapa guianensis; Carapa surinamensis; DNA-fingerprints; Geographical origin; MassARRAY; MiSeq; RADSeq; Tropical timber |
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Low coverage MiSeq genome sequencing and restriction associated DNA sequencing (RADseq) were used to identify nuclear and plastid SNP and INDEL genetic markers in Carapa guianensis. 261 genetic markers including 237 nuclear SNPs, 22 plastid SNPs, and 2 plastid INDELs are described based on 96 genotyped individuals from French Guiana, Brazil, Peru, and Bolivia. The best 117 SNPs for identifying population structure and performing individual assignment are assembled into four multiplexes for MassARRAY genotyping. |
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BIOGECO, INRA, University Bordeaux, Cestas, 33610, France |
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Springer Netherlands |
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EcoFoG @ webmaster @ |
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909 |
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Honorio Coronado, E.N.; Blanc-Jolivet, C.; Mader, M.; García-Dávila, C.R.; Sebbenn, A.M.; Meyer-Sand, B.R.V.; Paredes-Villanueva, K.; Tysklind, N.; Troispoux, V.; Massot, M.; Degen, B. |
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Development of nuclear and plastid SNP markers for genetic studies of Dipteryx tree species in Amazonia |
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2019 |
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Conservation Genetics Resources |
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Conserv. Genet. Res. |
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11 |
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3 |
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333-336 |
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We developed nuclear and plastid single nucleotide polymorphism (SNP) and insertion/deletion (INDEL) markers for Dipteryx species using a combination of restriction associated DNA sequencing (RADSeq) and low coverage MiSeq genome sequencing. Of the total 315 loci genotyped using a MassARRAY platform, 292 loci were variable and polymorphic among the 73 sampled individuals from French Guiana, Brasil, Peru, and Bolivia. A final set of 56 nuclear SNPs, 26 chloroplast SNPs, 2 chloroplast INDELs, and 32 mitochondrial SNPs identifying significant population structure was developed. This set of loci will be useful for studies on population genetics of Dipteryx species in Amazonia. |
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1877-7260 |
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EcoFoG @ webmaster @ Honorio Coronado2019 |
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906 |
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Barabe, D.; Lacroix, C.; Gibernau, M. |
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Developmental floral morphology of Syngonium in the context of the tribe Caladieae (Araceae) |
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2012 |
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Willdenowia – Annals of the Botanic Garden and Botanical Museum Berlin-Dahlem |
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42 |
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2 |
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297-305 |
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Aroids; Inflorescence; Phylogeny; Oxalate Crystals; Flower |
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The floral development of Syngonium angustatum is analysed in the context of a recently published molecular phylogeny of the Araceae. The initiation of discoid floral primordia occurs acropetally on the surface of the inflorescence. Female flowers, atypical bisexual flowers, sterile male flowers and male flowers are inserted on the same phyllotactic spirals on the spadix. Stamen primordia are initiated simultaneously on the periphery of more or less circular floral primordia. There are four stamens per flower (rarely three). In a synandrium, the fusion of stamens occurs very early during their developmental cycle. In some flowers one or two stamens remain free. The staminodes are also initiated on the periphery of the discoid floral primordium and their number varies from four to six. The growth of the fused staminodes will eventually form a longitudinal cavity in the centre of the mature synandrode. On the synandrodes located near the female zone, one or two staminodes remain free during development. No atypical bisexual flowers were observed on the inflorescence of Syngonium. The presence of a few calcium oxalate crystals was observed on the surface of all types of flowers. All the atypical flowers located at the base of the sterile zone corresponded to sterile male flowers and resulted from a more or less random disorganisation of the typical structure of a synandrode. In the Aroideae, free stamens or staminodes represent a plesiomorphic condition. The association of synandria and synandrodes is present in all early diverging genera of the tribe Caladieae and could represent the ancestral state. It is not clear if free stamens have evolved once or twice in the tribe Caladieae, both scenarios are possible. |
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EcoFoG @ webmaster @ |
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460 |
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Anouhe, J.-B.S.; Adima, A.A.; Niamké, F.B.; Stien, D.; Amian, B.K.; Blandinieres, P.-A.; Virieux, D.; Pirat, J.-L.; Kati-Coulibaly, S.; Amusant, N. |
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Dicorynamine and harmalan-N-oxide, two new β-carboline alkaloids from Dicorynia guianensis Amsh heartwood |
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2015 |
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Phytochemistry Letters |
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Phytochemistry Letters |
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12 |
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158-163 |
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ABTS antioxidant; Biogenesis; Dicorynia guianensis; Nitrone; Spiroindolone |
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Abstract The chemical investigations of Dicorynia guianensis heartwood led to the isolation of four new indole alkaloids for the first time in this plant. Compound (1) identified as spiroindolone 2′,3′,4′,9′-tetrahydrospiro [indoline-3,1′pyrido[3,4-b]-indol]-2-one, and compound (3) described as nitrone 1-methyl-4,9-dihydro-3H-pyrido [3,4-b] indole 2-oxide and were isolated for the first time as natural products. ABTS antioxidant activity guided their isolation. © 2015 Published by Elsevier B.V. on behalf of Phytochemical Society of Europe. |
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CIRAD, Département Environnements et Sociétés, UMR Ecologie des Forêts de GuyaneKourou cedex, France |
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Export Date: 24 April 2015 |
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EcoFoG @ webmaster @ |
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598 |
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Houadria, M.; Salas-Lopez, A.; Orivel, J.; Blüthgen, N.; Menzel, F. |
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Title |
Dietary and Temporal Niche Differentiation in Tropical Ants-Can They Explain Local Ant Coexistence? |
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2015 |
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Biotropica |
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Biotropica |
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47 |
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2 |
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208-217 |
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Ants; Baiting; Dietary specialization; Functional traits; Niche breadth; Partitioning; Temporal distribution |
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How species with similar ecological requirements avoid competitive exclusion remains contentious, especially in the species-rich tropics. Niche differentiation has been proposed as a major mechanism for species coexistence. However, different niche dimensions must be studied simultaneously to assess their combined effects on diversity and composition of a community. In most terrestrial ecosystems, ants are among the most abundant and ubiquitous animals. Since they display direct, aggressive competition and often competitively displace subordinate species from resources, niche differentiation may be especially relevant among ants. We studied temporal and trophic niche differentiation in a ground ant community in a forest fragment in French Guiana. Different baits were presented during day and night to assess the temporal and dietary niches of the local species. They represented natural food resources such as sugars, carrion, excrements, seeds, and live prey. In addition, pitfalls provided a background measure of ant diversity. The communities attracted to the different baits significantly differed from each other, and even less attractive baits yielded additional species. We detected species specialized on living grasshoppers, sucrose, seeds, or dead insects. Community-level differences between day and night were larger than those between baits, and many species were temporally specialized. In contrast to commonness, foraging efficiency of species was correlated to food specialization. We conclude that many ant species occupy different temporal or dietary niches. However, for many generalized species, the dietary, and temporal niche differentiation brought forward through our sampling effort, cannot alone explain their coexistence. |
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Department of Biology, Technical University of DarmstadtDarmstadt, Germany |
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Export Date: 17 March 2015 |
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