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Celem badań było określenie różnic między genotypami roślin mieszańców F₂ tolerancyjnych i nietolerancyjnych na niedobory N i K w podłożu, pochodzących z potomstw dwóch kombinacji krzyżowań linii wsobnych różniących się omawianą właściwością (153/79-1-5 x Ot 1-3; Ot 0-6 x Ot 1-3). Badania przeprowadzono na 100 losowo wybranych ziarniakach każdego mieszańca. Różnice genotypowe otrzymanych dwóch grup siewek określono w oparciu o test BSA (bulked segregant analysis). W wyniku amplifikacji ISSR-PCR obserwowano od 2 do 14 produktów, produktów długości od ~230 do ~1600 pz. Spośród 30 analizowanych starterów, sześć pozwoliło zróżnicować genotypy tolerancyjne i nietolerancyjne na niedobory azotu i potasu w podłożu. Specyficznymi, spośród obserwowanych i zarazem różnicującymi genotypy żyta tolerancyjne od nietolerancyjnych, okazały się produkty długości: ~550, ~940, ~ 1164 i ~1420 pz.
Species of Gleditsia show considerable morphological variability that makes them difficult to distinguish using either vegetative or floral characters. Honeylocusts, especially the thornless cultivars, are popular ornamental, shade, street, attractive landscape trees. In this study the ISSR technique was used to evaluate the range of genetic variability between seven genotypes of Gleditsia cultivated in Polish dendrological collections [Gleditsia caspica Desf., Gleditsia japonica Miq., Gleditsia japonica Miq. var. korainensis (= G. korainensis Nakai), Gleditsia triacanthos L., Gleditsia triacanthos L. (bulk), Gleditsia triacanthos f. inermis (L.) Zabel (bulk). Forty ISSR primers were tested and 18 were selected for their ability to produce clear and reproducible patterns of multiple bands.A total of 177 loci of 260-2600 bp were amplified, of which 89 (50%) were polymorphic, 14 (8%) monomorphic and 74 (42%) were accession-specific. Accession-specific ISSR loci were obtained for all of the seven accessions tested. A dendrogram generated using the UPGMA, based on a similarity measure of total character difference, showed that the Gleditsia accessions were clustered into two main groups (‘a’ and ‘b’). The first grup –‘a’– included: Gleditsia triacanthos L., Gleditsia triacanthos L. (bulk) and Gleditsia triacanthos f. inermis (L.) Zabel (similarity 0.61–0.75), the second –‘b’– included 2 species: Gleditsia japonica and Gleditsia japonica var. korainensis (similarity 0.43). Analysis of the phylogenetic similarity dendrogram has shown wide range of diversity between studied accessions. The clustering pattern obtained in our experiment was in agreement with the data based on morphological, allozyme and ITS analysis.
Inter-simple sequence repeat (ISSR) amplification was used to analyze polymorphism of microsatellite sequences in the lilacs genom and to evaluate genetic diversity among seven lilacs species (Syringa × prestoniae McKelvey., S. reflexa K.C. Schneid., S. villosa Vahl, S. × chinensis Willd., S. meyeri K.C.Schneid., S. vulgaris L.and S. reticulata (Blume) var. amurensis (Rupr.)). The plant material was originated from the collection of Dendrological Garden in Przelewice.A total of 30 primers, containing different simple sequence repeat motifs were tested for amplification.Out of the 30 primers only 13 gave interpretable banding patterns in all lilacs species.A total of 182 ISSR fragments were generated with 13 primers of which 109 (60%) were polymorphic and 57 (31.2%) species-specific. ISSR–PCR with genomic DNAs of the showed lilacs yielded DNA fragmets ranging form 2200 to 123 bp in size.Species-specific ISSR fragments were detected for each lilacs accessions.UPGMA cluster analysis was used to construct a dendrogram and to estimate the genetic distances between lilacs species.The ISSR-based phylogeny was generally consistent with Syringa taxonomy based on morphological and phenological evidence.
The aim of this study was to determine the morphological and genetic variability of four Nepeta genotypes: N. cataria var. citriodora, N. × faassenii, N. mussinii, and N. nuda from the Collection of Medical Plants in Dołuje, Vegetable Faculty, Agricultural University of Szczecin, Poland. Morphological variation among the examined catnip forms was determined using biometric measurements which included the plants height, the width of a leaf pair, the length and width of a leaf blade, the length of an inflorescence, the weights of fresh and dried green parts and the essential oils content. The DNA polymorphism within microsatellite sequences was determined using the ISSR-PCR technique. The conducted biometric measurements proved that the examined Nepeta plants differed significantly in all analysed features. Twenty microsatellite primers were used in ISSR reactions; clear products were generated in reactions with six of them. In general, 72 loci were amplified (110 amplicons); five of them (7%) turned out to be monomorphic, 20 (28%) polymorphic and 47 (65%) were specific for the examined accessions. Unique loci were amplified for each examined Nepeta genotype. A phylogenetic tree was constructed on the basis of a UPGMA cluster algorithm. It consisted of one similarity group ‘a’, in which N. × faassenii, N. mussinii and N. nuda were included.
The aim of conducted studies was to determine genetic and morphological variability of selected Davidia involucrata specimens from Western Pomerania and Berlin us- ing ISSR-PCR technique. The studies were carried out on the Davidia involucrata var. vilmoriniana growing in Germany in the Botanical Garden in Berlin-Dahlem and in Poland, in Pomerania: in the Dendrological Garden in Przelewice, Glinna and Central Cemetary in Szczecin. ISSR technique made it possible to determine genetic variability of the examined specimens. This was done by means of 6 out of 30 ISSR primers used in the experiment. Six primers (802, 807, 810, 819, 839, 840) generated in PCR reactions 64 amplicons, of which: 11 were monomorphic, 31 – polymorphic and 12 – genotype-specific. On average 1 primer generated 10 amplicons which ranged from 2550 to 270 bp.
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