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Ecological Stability of Geographical Races of Spruce. P. 61–70

Версия для печати

Section: Biology

UDC

630*165.52

Authors

Nakvasina Elena Nikolaevna
Forestry Engineering Institute, Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia)
e-mail: e.nakvasina@narfu.ru
Demina Nadezhda Aleksandrovna
Postgraduate Student, Forestry Engineering Institute, Northern (Arctic) Federal University named after M.V. Lomonosov; Northern Research Institute of Forestry (Arkhangelsk, Russia)
e-mail: deminadezhda2@rambler.ru

Abstract

Geographical cultures help solve practical problems of seed zoning and are a natural laboratory for genetic and ecological studies. We researched the “genotype–environment” interaction allowing us to estimate the stability, plasticity and adaptive value of spruce progeny exemplified by a number of climatypes from different habitats. We used data on survival, growth and productivity of progenies in the Arkhangelsk and Vologda Regions and the Komi Republic. These are: Picea abies (L.) Karst., Picea obovata Ledeb. and their hybrids. To estimate the stability of productivity and survival of progenies in the environment we applied Eberhart-Russell’s method. As a relative index we used the standardized parameter deviation expressed in terms of the units of standard deviation from the mean. The greatest plasticity of survival and growth parameters in cultures of second age-class was observed in the geographical race of spruce from Karelia (Segezhsky district), which is a hybrid species with predominant features of Siberian spruce. Siberian spruce populations of the Arkhangelsk Region and the Komi Republic have low plasticity, and their progenies show reduced survival and growth when moved to the west or southwest. When moved northward from the habitat optimum, progenies of European spruce and related introgressive hybrids have significantly lower survival, but retain their adaptive stability in terms of growth. Ecological stability in terms of survival decreases with age when spruce appears from under the snow сover, which affects the adaptive stability of its progenies. Up to the age of 40, the ecological stability of spruce progenies in terms of growth and productivity (growing-stock) remains fairly constant. Reduced ecological stability in terms of environment is only observed in the slow-growing progenies of the northernmost population of Siberian spruce. Peculiarities of common spruce plasticity should be considered when planning to use seeds for reforestation in the European North of Russia.

Keywords

geographical races of spruce, geographical cultures, spruce climatypes, ecological stability
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References

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