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Relative warp analysis of cranial and upper molar shape in rock mice Apodemus mystacinus sensu lato

100%

Krystufek B. , Janzekovic F.

nr 4

493-504

We studied phenotypic relationships among 13 samples of two rock mice species:Apodemus mystacinus (Danford and Alston, 1877) from Anatolia (n = 38) andA. epimelas (Nehring, 1902) from the Balkans (n = 71). Cartesian coordinates of landmarks were collected on the skull and on the occlusal projection of the upper molars (18 landmarks). Centroid size (a measure of overall size) suggested that molars vary independently of overall skull size in both species. Discriminant function analysis on relative warp scores classified >80% of specimens into the correct species, with the best results obtained for the ventral aspect of the skull and for molars. Projection of the 1st discriminant function scores against centroid size provided good separation between the two species. Analysis of vector displacements associated with extremes of variation suggested considerable phenetic differences on the ventral side of the skull and in the molar shape of the two species. The great majority of shifts in landmarks were in a longitudinal direction and the rearrangements of molar cusps were more complex than was the case with the cranium. A bivariate plot of the posterior hard palate length against the incisive foramen length separatedA. mystacinus andA. epimelas well.

Leaf fluctuating asymmetry of Myrtus communis L., affected by increases in atmospheric CO2 concentration: evidence from a natural CO2 spiring

80%

Kaligaric M. , Tognetti R. , Janzekovic F. , Raschi A.

nr 4

503-508

We studied leaf fluctuating asymmetry in Myrtus communis occurring around the “I Borboi” natural CO₂ spring (Tuscany, Italy) and in a nearby control site, in a Mediterranean environment. Developmental instability, measured as leaf fluctuating asymmetry, is expected to be positively related to environmental stress and negatively to habitat quality. A gradiental decline in leaf width and leaf angle fluctuating asymmetry was found along the decreasing CO₂ concentration from double to ambient. The correlation is ascribed to the positive effect of elevated CO₂ on developmental stability. Probably, the adaptation process of individuals grown in close proximity to the CO₂-enriched area took advantage of improved water use and carbon balance of M. communis plants.

Variability of Christmas rose [Helleborus niger L.] populations and its potential use in genetic breeding

51%

Susek A. , Ivancic A. , Lemoine M. C. , Guillemin J. P. , Caneill J. , Sisko M. , Janzekovic F. , Praprotnik L.

Acta Biologica Cracoviensia. Series Botanica

2005

tom 47

nr 2

The Christmas rose (Helleborus niger L.) is widely distributed in Southern and Central Europe, and Slovenia is probably one of the centers of its diversity. The investigation was aimed at evaluating phenotypic diversity among selected wild populations in Slovenia and neighboring Croatia. Some of the analyzed traits expressed relatively very high variation (e.g., number of leaves per plant, number of inflorescences per plant). The variation ranges of some of the analyzed traits were found to be wider than those mentioned in the literature. Statistical analysis indicated that variability was more expressed within than between populations. In terms of present market requirements, the most valuable populations are Žumberak (Croatia), containing plant material with the longest peduncles and largest flowers, and Peca, containing genotypes with the highest number of inflorescences per plant.