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Author |
Scotti-Saintagne, C.; Mariette, S.; Porth, I.; Goicoechea, P.G.; Barreneche, T.; Bodenes, K.; Burg, K.; Kremer, A. |
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Title |
Genome scanning for interspecific differentiation between two closely related oak species [Quercus robur L. and Q petraea (Matt.) Liebl.] |
Type |
Journal Article |
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Year |
2004 |
Publication |
Genetics |
Abbreviated Journal |
Genetics |
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Volume |
168 |
Issue |
3 |
Pages |
1615-1626 |
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Abstract |
Interspecific differentiation values (G(ST)) between two closely related oak species (Quercus petraea and Q. robur) were compiled across different studies with the aim to explore the distribution of differentiation at the genome level. The study was based on a total set of 389 markers (isozymes, AFLPs, SCARs, microsatellites, and SNPs) for which allelic frequencies were estimated in pairs of populations sampled throughout the sympatric distribution of the two species. The overall distribution of GST values followed an L-shaped curve with most markers exhibiting low species differentiation (G(ST) < 0.01) and only a few loci reaching >10% levels. Twelve percent of the loci exhibited significant G(ST) deviations to neutral expectations, suggesting that selection contributed to species divergence. Coding regions expressed higher differentiation than noncoding regions. Among the 389 markers, 158 could be mapped on the 12 linkage groups of the existing Q. robur genetic map. Outlier loci with large G, values were distributed over 9 linkage groups. One cluster of three outlier loci was found within 0.51 cM; but significant autocorrelation of GST was observed at distances <2 cM. The size and distribution of genomic regions involved in species divergence are discussed in reference to hitchhiking effects and disruptive selection. |
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INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: kremer@pierronton.inra.fr |
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GENETICS |
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ISSN |
0016-6731 |
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Notes |
ISI:000225767400041 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
258 |
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Author |
Degen, B.; Bandou, E.; Caron, H. |
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Title |
Limited pollen dispersal and biparental inbreeding in Symphonia globulifera in French Guiana |
Type |
Journal Article |
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Year |
2004 |
Publication |
Heredity |
Abbreviated Journal |
Heredity |
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Volume |
93 |
Issue |
6 |
Pages |
585-591 |
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Keywords |
gene flow; microsatellites; mixed mating; spatial autocorrelation; tropical tree; twogener |
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Abstract |
In this paper, we report a study of the mating system and gene flow of Symphonia globulifera, a hermaphroditic, mainly bird-pollinated tree species with a large geographic distribution in the tropical Americas and Africa. Using three microsatellites, we analysed 534 seeds of 28 open pollinated families and 164 adults at the experimental site 'Paracou' in French Guiana. We observed, compared to other tropical tree species, relatively high values for the effective number of alleles. Significant spatial genetic structure was detected, with trees at distances up to 150 m more genetically similar than expected at random. We estimated parameters of the mating system and gene flow by using the mixed mating model and the TwoGener approach. The estimated multilocus outcrossing rate, t(m), was 0.920. A significant level of biparental inbreeding and a high proportion of full-sibs were estimated for the 28 seed arrays. We estimated mean pollen dispersal distances between 27 and 53 m according to the dispersal models used. Although the adult population density of S. globulifera in Paracou was relatively high, the joint estimation of pollen dispersal and density of reproductive trees gave effective density estimates of 1.6 and 1.3 trees/ha. The parameters of the mating system and gene flow are discussed in the context of spatial genetic and demographic structures, flowering phenology and pollinator composition and behaviour. |
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Address |
BFH, Inst Forest Genet & Forest Tree Breeding, D-22927 Grosshansdorf, Germany, Email: b.degen@holz.uni-hamburg.de |
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NATURE PUBLISHING GROUP |
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0018-067X |
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Notes |
ISI:000225354800009 |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
259 |
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Author |
Scotti-Saintagne, C.; Bodenes, C.; Barreneche, T.; Bertocchi, E.; Plomion, C.; Kremer, A. |
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Title |
Detection of quantitative trait loci controlling bud burst and height growth in Quercus robur L |
Type |
Journal Article |
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Year |
2004 |
Publication |
Theoretical and Applied Genetics |
Abbreviated Journal |
Theor. Appl. Genet. |
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Volume |
109 |
Issue |
8 |
Pages |
1648-1659 |
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Abstract |
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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Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: antoine.kremer@pierroton.inra.fr |
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Publisher |
SPRINGER |
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ISSN |
0040-5752 |
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Notes |
ISI:000225054800012 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
260 |
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Author |
Rahali, H.; Ghanem, N.; Griffe, L.; Rahali, R.; Stien, D. |
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Title |
A general approach to the quantification of resin-bound functional groups by NMR |
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Journal Article |
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Year |
2004 |
Publication |
New Journal of Chemistry |
Abbreviated Journal |
New J. Chem. |
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Volume |
28 |
Issue |
11 |
Pages |
1344-1346 |
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Abstract |
There has been a continuing need for sensitive, accurate and rapid methods to monitor functional loading of insoluble supports for solid phase synthesis. The present articles reports our findings regarding functional group loading quantification using H-1 NMR. Results obtained for supported amino, hydroxyl and NH-Fmoc groups are in agreement with those calculated using well-established methods and demonstrate that the strategy of looking, either at the excess reagent left in solution (NH2 and OH), or at the protecting group derivatives released from the polymer (Fmoc), is a viable approach to resin loading quanti. cation. |
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Address |
Univ Montpellier 2, CNRS, UMR 5810, Lab Aminoacides Peptides & Prot, F-34095 Montpellier 05, France, Email: didier.stien@guyane.cnrs.fr |
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Publisher |
ROYAL SOC CHEMISTRY |
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ISSN |
1144-0546 |
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Notes |
ISI:000224894700013 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
261 |
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Author |
Amusant, N.; Beauchene, J.; Fournier, M.; Janin, G.; Thevenon, M.F. |
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Title |
Decay resistance in Dicorynia guianensis Amsh.: analysis of inter-tree and intra-tree variability and relations with wood colour |
Type |
Journal Article |
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Year |
2004 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
61 |
Issue |
4 |
Pages |
373-380 |
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Keywords |
Dicorynia guianensis; Amazonian wood; wood colour/decay resistance; heartwood; variability |
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Abstract |
Dicorynia guianensis Amsh. is very widespread in the forests of French Guiana and moreover is the leading species harvested in this area, but its main defect remains the great variability of wood durability, especially with respect to fungal decay. The aim of this work was to study this inter- and intra-tree variability in order to identify the parameters responsible for this variation (growth area, height and radial position) within the tree. The resistance decrease from the outer heartwood to the pith. Measurement of colour variation using the CIELAB (L*, a*, b*, C*, h*) system was performed at the intra-tree level to highlight the longitudinal and radial gradients of variation. Dicorynia guianensis becomes less red and dark from the outer to the inner heartwood and from the base to the top. Lastly, variations of colour and durability were correlated: the wood is less resistant the redder and darker it is. |
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Address |
CIRAD Foret, Forest Prod Programme, F-34398 Montpellier 5, France, Email: nadine.amusant@cirad.fr |
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Publisher |
E D P SCIENCES |
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ISSN |
1286-4560 |
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Notes |
ISI:000223955500009 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
262 |
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Author |
Stien, D.; Gastaldi, S. |
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Title |
Design of polyaromatic hydrocarbon-supported tin reagents: A new family of tin reagents easily removable from reaction mixtures |
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Journal Article |
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Year |
2004 |
Publication |
Journal of Organic Chemistry |
Abbreviated Journal |
J. Org. Chem. |
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Volume |
69 |
Issue |
13 |
Pages |
4464-4470 |
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Abstract |
We report in this paper the preparation and use of stannanes 11, 12a, and 12b, compounds whose 3-pyrenylpropyl side chain affinity for activated carbon simplifies tin removal and product isolation. Our pyrene-supported reagents can be used for radical reductions and cyclizations (11), radical and cationic allylations (12a), and Stille couplings (12b) in much the same way as tributyltin derivatives. |
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Address |
CNRS UPS 2561, Cayenne 97300, French Guiana, Email: didier.stien@guyane.cnrs.fr |
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Publisher |
AMER CHEMICAL SOC |
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ISSN |
0022-3263 |
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Notes |
ISI:000222187200022 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
263 |
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Author |
Degen, B.; Roubilk, D.W. |
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Title |
Effects of animal pollination on pollen dispersal, selfing, and effective population size of tropical trees: A simulation study |
Type |
Journal Article |
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Year |
2004 |
Publication |
Biotropica |
Abbreviated Journal |
Biotropica |
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Volume |
36 |
Issue |
2 |
Pages |
165-179 |
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Keywords |
Amazon; bees; Brazil; Dipteryx; Jacaranda; model; pollination; sensitivity analysis; trees |
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Abstract |
Animals, especially insects, are principal pollen vectors of tropical trees and have behavior patterns that affect gene dispersal. Here, we explore complex pollination systems using a new simulation model Eco-Gene and considering, among other factors, flowering synchrony. spatial distribution of trees, degree of selfing, population densities, pollinator flight distances, pollen deposition, and pollinator response to floral display size. Sensitivity analyses using two contrasting tree data sets (Jacaranda copaia and Dipteryx odorata) determined the importance of each parameter on three response variables: the proportion of seeds from self-pollination, effective population size, and pollen dispersal. Spatial considerations and attractiveness of floral displays were prominent features determining the population genetic result of pollinators, and some biological implications of the results are discussed. |
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Address |
INRA, Kourou 97387, French Guiana, Email: degen_b@kourou.cirad.fr |
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Publisher |
ASSOC TROPICAL BIOLOGY INC |
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ISSN |
0006-3606 |
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Notes |
ISI:000222092900006 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
264 |
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Author |
Le Guen, V.; Rodier-Goud, M.; Troispoux, V.; Xiong, T.C.; Brottier, P.; Billot, C.; Seguin, M. |
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Title |
Characterization of polymorphic microsatellite markers for Microcyclus ulei, causal, agent of South American leaf blight of rubber trees |
Type |
Journal Article |
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Year |
2004 |
Publication |
Molecular Ecology Notes |
Abbreviated Journal |
Mol. Ecol. Notes |
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Volume |
4 |
Issue |
1 |
Pages |
122-124 |
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Keywords |
Hevea brasiliensis; Microcyclus ulei; microsatellite markers; phytopathogenic fungi; South American leaf blight |
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Abstract |
South American leaf blight caused by the ascomycete Microcyclus Wei is the most harmful disease of the rubber tree in Latin America and a potential threat to Asiatic and African natural rubber production. Until now, the variability of this fungus was assessed through observation of pathogenicity of isolates on a range of rubber tree clones with known resistance reactions. The present study describes the process used to design 11 microsatellite markers and evaluates their usefulness in detecting genetic polymorphism. Nine of these markers were polymorphic among six isolates from Brazil (with two to three alleles per locus) and five markers were polymorphic among four isolates from French Guiana (with two to four alleles per locus). |
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Address |
CIRAD, F-97387 Kourou, France, Email: vincent.le_guen@cirad.fr |
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Publisher |
BLACKWELL PUBLISHING LTD |
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ISSN |
1471-8278 |
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Notes |
ISI:000189159500037 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
265 |
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Author |
Gond, V.; Bartholome, E.; Ouattara, F.; Nonguierma, A.; Bado, L. |
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Title |
Monitoring and mapping of waters and wetlands in arid regions using the SPOT-4 VEGETATION imaging system |
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Journal Article |
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Year |
2004 |
Publication |
International Journal of Remote Sensing |
Abbreviated Journal |
Int. J. Remote Sens. |
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Volume |
25 |
Issue |
5 |
Pages |
987-1004 |
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Abstract |
Monitoring the state of small waterbodies and wetlands is very useful in dry regions, because their existence is entirely controlled by the rhythm of local rainfall. On VEGETATION image colour composites, waterbodies and marshy vegetation show up clearly. Yet simple image classification does not yield sufficiently good results because 'spectral signatures' vary significantly together with the ecological conditions of these surfaces. A robust contextual procedure taking into account local contrast was successfully developed and tested. A systematic validation was carried out and a map of waterbodies and wetlands was produced for Burkina Faso and neighbouring regions. |
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Address |
Ctr Commun Rech, I-21020 Ispra, VA, Italy, Email: valery.gond@cirad.fr |
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TAYLOR & FRANCIS LTD |
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ISSN |
0143-1161 |
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Notes |
ISI:000187996500007 |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
266 |
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Author |
Scotti-Saintagne, C.; Bodenes, C.; Barreneche, T.; Pot, D.; Plomion, C.; Kremer, A. |
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Title |
Distribution of genomic regions differentiating oak species assessed by QTL detection |
Type |
Journal Article |
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Year |
2004 |
Publication |
Heredity |
Abbreviated Journal |
Heredity |
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Volume |
92 |
Issue |
1 |
Pages |
20-30 |
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Keywords |
QTL; leaf morphology; repeatability; genetic map; Q. robur |
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Abstract |
Pedunculate oak and sessile oak are two sympatric inter-fertile species that exhibit leaf morphological differences. We aimed to detect quantitative trait loci (QTLs) of these traits in order to locate genomic regions involved in species differentiation. A total of 15 leaf morphological traits were assessed in a mixed forest stand composed of Quercus petraea and Q. robur and in a full-sib pedigree of Q. robur. The progeny of the full-sib family were vegetatively propagated in two successive experiments comprising 174 and 216 sibs, and assessments were made on two leaves collected on each of the 1080 and 1530 cuttings corresponding to the two experiments. Traits that exhibited strong species differences in the mixed stand tended also to have higher repeatability values in the mapping population, thus indicating higher genetic control. A genetic map was constructed for QTL detection. Composite interval mapping with the one QTL model was used for QTL detection. From one to three QTLs were detected for 13 traits. In-depth analysis of the QTLs, controlling the five morphological traits that exhibited the highest interspecific differences in the mixed stand, indicated that they were distributed on six linkage groups, with two clusters comprising QTLs of at least two discriminant traits. These results were reinforced when error 1 for QTL detection was set at 5% at the chromosome level, as up to nine clusters could be identified. In conclusion, traits involved in interspecific differentiation of oaks are under polygenic control and widespread in clusters across the genome. |
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Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France |
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Publisher |
NATURE PUBLISHING GROUP |
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ISSN |
0018-067X |
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Notes |
ISI:000187216300005 |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
267 |
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