Genetic and Phenotypic Diversity of Cajanderi Larch (Larix cajanderi Mayr) in the North of the Russian Far East
N. V. ORESHKOVA1,2, V. P. VETROVA3, N. V. SINELNIKOVA4
1Sukachev Institute of Forest, SB RAS, 660036, Krasnoyarsk, Akademgorodok, 50/28
2Siberian Federal University, 660041, Krasnoyarsk, Svobodny ave., 79
3Pacific Geographical Institute, FEB RAS, 683024, Petropavlovsk-Kamchatsky, Rybakov ave, 19-А
4Institute of Biological Problems of the North, FEB RAS, 685000, Magadan, Portovaya str., 18
Keywords: Cajanderi larch, microsatellite loci, phenotypic markers, genetic variation, population structure
Abstract
The study of genetic and phenotypic diversity of Cajanderi larch was carried out in the north-east of Asia - in the Magadanskaya Oblast and on the Kamchatka Peninsula. Genetic diversity of the larch was investigated using eight nuclear microsatellite loci (bcLK056, bcLK066, bcLK224, bcLK232, bcLK260, bcLK235, UAKLly6, UBCLXtet-1-22). Phenotypic diversity was estimated using shape characteristics of the cone-scales determined by methods of geometric morphometrics. The microsatellite analysis revealed high level of genetic diversity of L. cajanderi in the Far North of Asia. Significant genetic and phenotypic differences between L. cajanderi samples from the Magadanskaya Oblast and Kamchatka suggested early isolation of the larch on the peninsula. Deficiency of heterozygote genotypes was detected in all investigated larch populations in Kamchatka, which related to high degree of inbreeding. Excess of heterozygote genotypes was observed in the Magadan populations of L. cajanderi, which was probably due to the balancing selection in favor of heterozygotes.
DOI: http://dx.doi.org/10.1134/S1995425515010096
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