Genetic evidence of natural hybridization between Siberian stone pine, Pinus sibirica Du Tour, and dwarf Siberian pine, P. pumila (Pall.) Regel
1999
Politov, D.V. | Belokon, M.M. | Maluchenko, O.P. | Belokon, I.S. | Krutovkii, K.V. (N.I. Vavilov Institute of General Genetics, Moscow (Russia). Laboratory of Population Genetics) | Molozhnikov, V. N. | Mejnartowicz, L. E.
Sympatric populations of two Eurasian bird-dispersed pine species Pinus sibirica and P. pumila, and their putative natural hybrid were analyzed using 28 allozyme loci controlling 14 enzyme systems. The Adh-1, Fe-2, and Lap-3 loci in the hybrid had genotypes that are typical for P. sibirica, but did not occur or are unlikely in P. pumila. The Gdh, Got-2, Got-3, Pgm-1 and Pgm-2 loci had carried alleles and genotypes unknown for P. sibirica, but were common in P. pumila. The Skdh-2 locus was heterozygous for alleles, one of which was specific to P. sibirica, the other to P. pumila. Some embryos from seeds of the hybrid were likely resulted from selfing, while others from backcrosses with paternal species. This is the first genetic evidence of natural hybridization and possible gene exchange between Siberian stone pine and dwarf Siberian pine.
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