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1

Allozyme variability of putative hybrid swarm population (Pinus mugo Turra x P.sylvestris L.) from Topielisko peat-bog near Zieleniec

100%
Siedlewska A., Pros-Glowacki W.
Genetica Polonica
|
1994
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vol. 35
|
issue 4
285-302
EN
The purpose of investigation was to analyse the isoenzymatic variability of the population from Topielisko peat-bog, representing probably a hybrid swarm (Pinus mugo Turra x P.sylvestris L.), and compare the genetic structure of this population with that of P.mugo and P.sylvestris populations as putative parental species.Allozyme variation at 10 enzymatic loci was studied in a group of 300 individuals from the population in Topielisko reservation against variation of 5 P.mungo populations from the Tatra Mts. (2 of which from the mountain peat-bogs) and 3 P.silvestris populations.
2

Reciprocal controlled crosses between Pinus sylvestris and P. mugo verified by a species-specific cpDNA marker

88%
Wachowiak W., Lewandowski A., Prus-Glowacki W.
Journal of Applied Genetics
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2005
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vol. 46
|
issue 1
41-43
EN
A species-specific marker of cpDNA (paternally inherited in pines) was used to verify the hybrid origin of seedlings from controlled reciprocal crosses between Pinus sylvestris and P. mugo. A very low degree of compatibility between those two species has been revealed. In the three consecutive years of experiments, no filled seeds were obtained in the combination with P. mugo as the seed parent. From P. sylvestris as the seed parent and P. mugo as the pollen donor, we succeeded to obtain four filled seeds (about 1 %), but only in one year. The seedling obtained from the seeds had cpDNA haplotypes specific to P. mugo, which proves their hybrid origin. This method enables verification of the result of controlled crosses. The importance of the results has been discussed in the aspect of postulated natural hybridisation in sympatric populations of the two species.
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