Suchergebnisse

Variante(s) de titre : Rapport annuel de la zone franc ; Variante(s) de titre : Rapport annuel du Comité monétaire de la zone franc ; Périodicité : Annuel ; Avec mode texte

International audience ; La psychologie semble devoir rester perpétuellement en état de crise, constamment sollicitée et divisée par le tentation biologique et la tentation sociologique. Sans cesse, à mesure que se précise la connaissance des structures nerveuses et des conditions hormonales de l'équilibre du vivant, le psychologue découvre que les conduites qu'il a décrites ont un substrat physiologique profond: de plus en plus profond. [.] D'un autre côté n'est-il pas évident que les conduites humaines sont permises par l'ensemble culturel qui leur donne du sens? Elles visent parole, travail, jeu, création artistiques ou scientifiques, entreprises économiques ou politiques, le maintien ou l'édification d'une civilisation.

International audience ; La psychologie semble devoir rester perpétuellement en état de crise, constamment sollicitée et divisée par le tentation biologique et la tentation sociologique. Sans cesse, à mesure que se précise la connaissance des structures nerveuses et des conditions hormonales de l'équilibre du vivant, le psychologue découvre que les conduites qu'il a décrites ont un substrat physiologique profond: de plus en plus profond. [.] D'un autre côté n'est-il pas évident que les conduites humaines sont permises par l'ensemble culturel qui leur donne du sens? Elles visent parole, travail, jeu, création artistiques ou scientifiques, entreprises économiques ou politiques, le maintien ou l'édification d'une civilisation.

International audience ; SUMMARY. The inwortance of tree-breeding research programs in Danmarkand Sweden during the last twenty years justify the trip performedin these countries ivith the following purpose: study of recentadvances of tree breeding methods, with particular attention drawnto the details of the technics concerning grafting, hybridization andestablishment of progeny tests and seed plantations.The tree breeding work is focused, in Danmark, on Beech andexotic species (Larch, Douglas fir) and in Sweden, on Scot Pine,Norway Spruce and Aspen.An accurate selection of parent individuals, followed by intra--specific hybridization in seed plantations, takes the first place inthe breeding programs. Several thousands of plus trees were selectedand multiplicated by graft. While the greenhouse technics givehighly successful grafts, important studies lead to good outdoorgrafting- technics during the recent years. The first seed orchardsfront an important program are planted in these years.If ybrid Larch and hybrid Aspen are bred by interspecific hybridization; they are used already in reforestation practice.Induced polyploidy or spontaneous polyploids used as mothertrees open new ways for investigations,• and hope for valuable improvements,especially with broadleaved trees.These both breeding technics — interspecific hybridization andpolyploidy --- are dealt with selected plus trees as mother trees.Progeny tests established and judged with the help of statisticalanalysis, take more and more place in the breeding work.in the both countries, governments, forests owners associations,timber and pulp industries, give their financial support to foresttree breeding research. The people interested in forest activitiespay the greatest attention to the advancement of the research programs.

International audience ; SUMMARY. The inwortance of tree-breeding research programs in Danmarkand Sweden during the last twenty years justify the trip performedin these countries ivith the following purpose: study of recentadvances of tree breeding methods, with particular attention drawnto the details of the technics concerning grafting, hybridization andestablishment of progeny tests and seed plantations.The tree breeding work is focused, in Danmark, on Beech andexotic species (Larch, Douglas fir) and in Sweden, on Scot Pine,Norway Spruce and Aspen.An accurate selection of parent individuals, followed by intra--specific hybridization in seed plantations, takes the first place inthe breeding programs. Several thousands of plus trees were selectedand multiplicated by graft. While the greenhouse technics givehighly successful grafts, important studies lead to good outdoorgrafting- technics during the recent years. The first seed orchardsfront an important program are planted in these years.If ybrid Larch and hybrid Aspen are bred by interspecific hybridization; they are used already in reforestation practice.Induced polyploidy or spontaneous polyploids used as mothertrees open new ways for investigations,• and hope for valuable improvements,especially with broadleaved trees.These both breeding technics — interspecific hybridization andpolyploidy --- are dealt with selected plus trees as mother trees.Progeny tests established and judged with the help of statisticalanalysis, take more and more place in the breeding work.in the both countries, governments, forests owners associations,timber and pulp industries, give their financial support to foresttree breeding research. The people interested in forest activitiespay the greatest attention to the advancement of the research programs.