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Spatial structure of a natural mixed topodeme of subalpine Sorbus taxa

100%

Gomory D. , Krajmerova D.

nr 4

305-311

Spatial distribution and genetic variation of a population of Sorbus chamaemespilus (L.) Crantz and putative hybrids between S. chamaemespilus, S. aria and S. aucuparia growing in the nature reserve Skalnä Alpa (central Slovakia) were studied. The analysis of spatial patterns using Ripley's K-function revealed a significant clustering of the adults of both S. chamaemespilus and hybrid taxa at distances up to ~15 m and a strong affinity between both taxonomical groups, indicating similar ecological requirements. Bivariate point-pattern analysis considering cardinal direction showed that juvenile individuals of S. chamaemespilus are clustered around the adults up to the distance of ~2 m, whereas in hybrid taxa with larger and more dense crowns, juveniles are clustered at distances more than ~3 m from the adults. The analysis of genetic variation in a subset of adult shrubs using 4 nuclear microsatellite loci revealed that unlike expected, there was no variation in S. chamaemespilus but several genotypes were found in the group of hybrid taxa. Implications for the reproduction system and conservation of the investigated taxa are discussed.

Influence of provenance transfer on the growth and survival of Picea abies provenances

80%

Krajmerova D. , Longauer R. , Pacalaj M. , Gomory D.

2009

tom 61 Supplement

Two provenance experiments with Norway spruce in Slovakia were used to reveal trends in the behaviour of provenances after their transfer. Regressions between the average height and survival of provenances and the differences between the geographic and selected climatic characteristics of the place of origin and provenance plots were significant for most of the characteristics tested. Data from the experiment with Polish and Slovak provenances from 1972 indicated that transfer into warmer regions with a longer vegetation period results in improved height growth and survival, with the exception of survival at initial stages. The experiment from 1964 with a broader altitudinal range of provenance plots, but with unadjusted latest measurements at individual plots available, revealed the best height growth of Slovak Norway spruce provenances after their transfer to sites with the mean annual temperature approximately 1°C higher and with the vegetation period 12 days longer than at places of origin. Transfer into lower altitudes, a warmer climate and a longer vegetation period improved survival. In both experiments, transfer to areas with increased rainfall had a negative effect on growth, which is probably associated with the fact that provenances are not able to exploit additional precipitation for the growth in areas with a colder climate and a shorter vegetation period.

Lack of signals of selection at candidate loci at a small geographical scale along a steep altitudinal gradient in Norway spruce (Picea abies [L.] Karst.)

80%

Hrivnak M. , Krajmerova D. , Gomory D.

nr 1

Single-nucleotide polymorphisms of candidate genes related to climate and physiological traits in silver fir provenances

61%

Konopkova A. , Krajmerova D. , Kurjak D. , Kmet J. , Ditmarova L. , Gomory D.

Acta Physiologiae Plantarum

2018

tom 40

nr 11-11th International Conference Plant Functioning under Environmental Stress...