Ecogeographic Variability and Differentiation of Japanese Dwarf Pine Populations in Kamchatka Region on the Basis of the Characters of Generative Organs
V. P. VETROVA1, A. P. BARCHENKOV2, Yu. V. SAVENKOVA1
1Kamchatka Branch of Pacific Geographical Institute FEB RAS, 683024, Petropavlovsk-Kamchatsky, Prospect Rybakov, 19-A
2V. N. Sukachev Institute of Forest SB RAN, 660036, Krasnoyarsk, Akademgorodok, 50
Keywords: cone morphology, phenotypic diversity, population variability, Pinaceae
Abstract
Assessment of ecogeographic variability and differentiation of Japanese dwarf pine Pinus pumila (Pall.) Regel (Pinaceae) populations on the Kamchatka Peninsula and Koryak was carried out using morphological and phenotypic characters of mature seed cones. In the sample of cones from 10 сoenopopulations viability of seeds was determined using radiographic method. Latitudinal phenotypic differentiation between сoenopopulations was revealed. Lower seed viability due to high percentage of seeds without embryos or with underdeveloped embryos was recorded in north-eastern populations. The average proportion of viable seeds in the region wass 52 %, while in the north-eastern populations this parameter was lower - 6-24 %.
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