24 research outputs found
Genetic aspects of age dynamics of a natural Picea abies (L.) Karst. population in the BiaĆowieĆŒa Primeval Forest, Poland
Genetic structure of Pallas pine (Pinus pallasiana D. Don) populations renewed under extreme conditions
Genetic variability of natural populations and man-made stands of common pine (Pinus sylvestris L.) in Kremenets Hills and Maloe Polese
Genetic features of root fungus-resistant scotch pine trees in artificial stands in the steppe zone of Ukraine
Allozyme variation of Pinus pallasiana D. Don in Natural Crimean populations and in plantations in technogenously-polluted areas of the Ukraine steppes
Allozyme variation parameters have been estimated and compared among four P. pallasiana D. Don plantations located in the Ukraine steppes and in three Crimea natural populations. The analyses also concerned three groups of trees selected for their possible tolerance/resistance to steppe conditions and to industrial pollution. The polymorphic loci percentage in the natural populations varied from 0.74 to 0.89 and the allele mean number varied from 2.4 to 2.7. Among the artificial plantations these values varied from 0.75 to 0.85 and from 2.35 to 2.75 respectively. Heterozygote deficiency (14.9%) was characteristic of 6 of the 7 stands examined. Instead, a heterozygote excess (14.6 to 36.9%), but less allele diversity, was revealed among groups of selected trees. Neiâs genetic distances averaged to 0.010 when comparing natural and artificial populations. Parameters measured on selected groups and on natural populations from the steppes showed an absence of inbreeding depression. The results of this study lead to a recommendation that these trees be used as the basic material in extensive plantation programs of P. pallasiana in the Ukraine steppes, including polluted areas.Variation alloenzymatique chez Pinus pallasiana de populations naturelles en CrimĂ©e et de peuplements plantĂ©s dans des zones industrielles polluĂ©es de la steppe ukrainienne. Les paramĂštres de variation alloenzymatique de 4 peuplements de Pinus pallasiana plantĂ©s dans la steppe ukrainienne de Pinus pallasiana et de 3 populations naturelles en CrimĂ©e ont Ă©tĂ© comparĂ©s. On a Ă©galement analysĂ© 3 groupes dâarbres sĂ©lectionnĂ©s pour leur probable rĂ©sistance/tolĂ©rance aux conditions de steppe et Ă la pollution industrielle. Le pourcentage de loci polymorphes dans les populations naturelles varie de 0,74 Ă 0,89 et le nombre dâallĂšles de 2,4 Ă 2,7, alors que les valeurs relevĂ©es dans les populations artificielles Ă©taient respectivement de 0,75 Ă 0,85 et de 2,35 Ă 2,75. Six populations sur 7 ont montrĂ© un dĂ©ficit dâhĂ©tĂ©rozygotie (14,9 %) alors quâun excĂšs dâhĂ©tĂ©rozygotie (de 14,6 Ă 36,9 %) et une diversitĂ© allĂšlique rĂ©duite Ă©taient notĂ©s dans les groupes dâarbres sĂ©lectionnĂ©s. La distance gĂ©nĂ©tique de Nei entre populations sĂ©lectionnĂ©es et populations naturelles est en moyenne de 0,1. Les paramĂštres mesurĂ©s dans les diffĂ©rents types de populations nâont pas rĂ©vĂ©lĂ© de dĂ©pression de consanguinitĂ©. Ces analyses permettent de recommander lâutilisation, comme matĂ©riel de base, dâarbres sĂ©lectionnĂ©s pour entamer dâimportants programmes de plantation de Pinus pallasiana dans la steppe ukrainienne, y compris dans le zones atteintes par la pollution industrielle