Variability of 8-year-old siberian pine seedlings grown from selected cones of altai origin

The size of cones in different populations of coniferous species differs in their indicators depending on the place of growth, heredity and other factors. The aim of the research was to analyze the variability of 8-year-old Siberian pine seedlings grown from selected cones collected in the Choysky forestry of the Altai Republic. The seeds were sown in the introduction department of the arboretum of the Karaulny Forestry of the Educational and Experimental Forestry of Reshetnev University (suburban zone of Krasnoyarsk). The variability of seed progeny was assessed by height, shoot growth, trunk diameter, and needle length. The level of variation of indicators was established according to the scale of S. A. Mamaev. Studies have shown that cones collected from different trees differed in shape, length, diameter, and number of seeds. The length of the cones varied from 7.5 to 11.5 cm with an average value of 9.1 cm; diameter varied from 5.5 to 6.3 cm with an average value of 5.7 cm. The cones were cylindrical and rounded. The number of seed scales varied from 45 to 89 pcs., the number of seeds varied from 85 to 169 pcs. The largest number of seeds was noted in cone No 29 of cylindrical shape. A close correlation (r = 0.995) was established between the number of seeds (y) and scales (x). The highest height is distinguished by seedlings from cone No 9, which has an excess in length. The level of variation in the height of seedlings in the compared families is from low to high, the interfamilial level of variation (11.3 %) is less than the intrafamilial level. The correlation coefficient between the length of the cones and the growth of seedlings is 0.829. The average length of the needles varied from 8.0 to 9.8 cm, that is, the difference between the extreme options is 22.5 %. Specimens distinguished by intensive growth, a large number of buds and long needles have been identified. 

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