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Brassicaceae derived food and feed responsible for low level thiouracil residues

100%

Kiebooms J. A. L., Vanden Bussche J., De Brabander H. F., Vanhaecke L.

Polish Journal of Food and Nutrition Sciences

2011

tom 61

nr Suppl.1

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Low level of genetic variation within Melica transsilvanica populations from the Krakow-Czestochowa Upland and the Pieniny Mts revealed by AFLPs analysis

84%

Szczepaniak M., Cieslak E.

Acta Societatis Botanicorum Poloniae

2007

tom 76

nr 4

321-331

Fragmented distribution, the breeding system and effects of genetic drift in small-size populations occurring at edge of the species range play an important role in shaping genetic diversity of such a species. Melica transsilvanica is a plant rare in the flora of Poland, where it reaches the northern limit of its continuous range. Amplified Fragment Length Polymorphism (AFLP) DNA profiling method was applied to measure genetic diversity among and within populations of M. transsilvanica. Additionally, genetic relationships between M. transsilvanica and Melica ciliata, two closely related species, were explored. A total of 68 plants from 7 populations of M. transsilvanica and 24 plants from 2 populations of M. ciliata, collected in Poland and outside it, were analyzed. Using 294 AFLP fragments from 3 primer combinations, accessions were grouped into two major clusters associating with M. ciliata and M. transsilvanica, respectively. Further, two subclusters, corresponding to the samples collected from the Pieniny Mts and from the Kraków - Częstochowa Upland were clearly distinguished within the M. transsilvanica group. The hierarchical AMOVA exhibited significant genetic distinction between these geographic regions (60.89%, p < 0.001). The obtained results showed that the most genetic diversity resided between the populations of M. transsilvanica (86.03%) while considerably lower genetic variation was found within the populations (13.97%), which is consistent with the results reported for self-plants. The low level of AFLP genetic variation of M. transsilvanica can be caused by the geographic isolation of populations, which preserves the dominant self-mating breeding system of the species. Individual populations of M. transsilvanica are characterized by isolated gene pools differing by a small number of loci.

Low level of inter-populational differentiation in Juniperus excelsa M. Bieb. (Cupressaceae)

67%

Mazur M., Boratynska K., Marcysiak K., Didukh Y., Romo A., Kosinski P., Boratynski A.

Dendrobiology

2004

tom 52

39-46

The intra- and inter-population variation in three populations of Juniperus excelsa, two from Crimea and one from the Balkan Peninsula, were analyzed biometrically. Fourteen morphological characters of cones, seeds, shoots and leaves were used. The number of seeds per cone appears to be the most variable character. The others were more stable. Differences among particular individuals within the samples were slight, as well as between populations compared. The Crimean samples were very close to each other, while the more geographically distant sample from the Balkan Peninsula appears also to be morphologically more separate. This suggests that the Balkan populations originated from another Pleistocene refugium. The Crimean populations did not show the reduction of variability, which could have resulted from their geographical isolation and their considerably restricted numbers of individuals.

Ograniczanie wyników

1 Acta Societatis Botanicorum Poloniae

1 Dendrobiology

1 Polish Journal of Food and Nutrition Sciences

1 Boratynska K.

1 Boratynski A.

1 Cieslak E.

1 De Brabander H. F.

1 Didukh Y.

1 Kiebooms J. A. L.

1 Kosinski P.

1 Marcysiak K.

1 Mazur M.

1 Romo A.

1 Szczepaniak M.

1 Vanden Bussche J.

1 Vanhaecke L.

1 2011

1 2007

1 2004

Wyniki wyszukiwania

Brassicaceae derived food and feed responsible for low level thiouracil residues

Low level of genetic variation within Melica transsilvanica populations from the Krakow-Czestochowa Upland and the Pieniny Mts revealed by AFLPs analysis

Low level of inter-populational differentiation in Juniperus excelsa M. Bieb. (Cupressaceae)