Wyniki wyszukiwania - AGRO

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Assessment of genetic diversity of Tilia rubra DC. by RAPD analysis in the Hyrcanian forests, North of Iran

100%

Hosseinzadeh Colagar A., Yusefi M., Zarei M., Yousefzadeh H.

Polish Journal of Ecology

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2013

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tom 61

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nr 2

Genetic variability and differentiation of six populations of Tilia rubra from Hyrcanian forests of the north of Iran were analyzed using random amplified polymorphic DNA (RAPD) markers. Seven primers pairs used to study six populations, in six localities located in at different altitude (250–2500 m a.s.l) but within the distance 50 km, provided 70 reliable bands, of which 29 (41.4%) were polymorphic. The average population diversity using the Shannon’s index (I) was 0.22 and ranged from 0.22 for Bandbon population to 0.08 for the Salahedinkola population. The mean heterozygosity varied from 0.013 to 0.06 within the populations of T. rubra. The AMOVA analysis showed a significant genetic differentiation within populations and 97% of the total variation occurred within populations and only 3% occurred among populations. Cluster analysis using the UPGMA method grouped all individuals into four clusters. The results did not correspond with the populations origin. The low inter-population differentiation and the lack of significant correlation between geographic and genetic distances suggest intensive gene flow among populations of Tilia rubra.

2

Characteristics of the genetic structure of native sheep breeds

100%

Kawecka A., Piorkowska K.

Annals of Animal Science

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2011

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tom 11

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nr 3

3

Using microsatellites to obtain genetic structure data for Red-backed Shrike [Lanius collurio]: a pilot study

100%

Pustjens A. Z., Peters J. L., Geertsma M., Gerats T., Esselink H.

Biological Letters

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2004

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tom 41

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nr 2

95-101

4

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The local populations of the fungus Schizophyllum commune Fr. as drivers of its biodiversity

100%

Boiko S.

Folia Forestalia Polonica. Series A . Forestry

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2021

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tom 63

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nr 4

5

A transcriptionally active copia-like retroelement in Citrus limon

100%

De F. B., Wilson R. R., Argenziano C., Kafantaris I., Conicella C.

Cellular and Molecular Biology Letters

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2009

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tom 14

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nr 2

289-304

The plant nuclear genome is largely composed of mobile DNA, which can rearrange genomes and other individual gene structure and also affect gene regulation through various promoted activities: transposition, insertion, excision, chromosome breakage, and ectopic recombination. Ty1-copia-like retrotransposon is a widespread class of transposable elements in the plant kingdom, representing a large part of the total DNA content. Here, a novel retrotransposon-like sequence was isolated and identified as the Ty1-copia-like reverse transcriptase domain (named here CLCoy1), based on the homology of known elements. Fluorescence in situ hybridization, revealed that CLCoy1 was mainly located in telomeric and sub-telomeric regions along the Citrus chromosomes. CLCoy1 composes 3.6% of the genome and, interestingly, while transposons are mostly specific to a species, this element was identified in other Citrus species such as Citrus aurantium, Fortunella margarita and Citrus paradisi, but undetected in Poncirus trifoliata. We also determined that wounding, salt and cell culture stress produced transcriptional activation of this novel retroelement in Citrus limon. The novel Ty1-copia-like element CLCoy1 may have played a major role in shaping genome structure and size during Citrus species evolution.

6

Genetic structure of Hucul and Anglo-Arabian horses at the TERT locus

100%

Zabek T., Czapla P., Bugno-Poniewierska M., Wnuk M., Lewinska A., Oklejewicz B., Bartosz G., Slota E.

Annals of Animal Science

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2012

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tom 12

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nr 4

7

Phylogeography analysis and molecular evolution patterns of the nematode parasite Heligmosomum mixtum based on mitochondrial DNA sequences

100%

Sakka H., Henttonen G., Baraket G., Amel S.-H., Michaux J.

Acta Parasitologica

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2015

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tom 60

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nr 1

8

Evaluation of changes in the genetic structure of Hucul horses based on the analysis of I type of genetic markers

100%

Nogaj A., Nogaj J., Kozubska-Sobocinska A., Rychlik T.

Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica

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2013

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tom 31

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nr 2

9

Population genetic structure of Iris pumila L. in Ukraine: effects of habitat fragmentation

100%

Bublyk O., Andreev I., Parnikoza I., Kunakh V.

Acta Biologica Cracoviensia. Series Botanica

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2020

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tom 62

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nr 1

100%

Van Staaden M. J.

Acta Theriologica. Supplement

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1995

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nr 03

Breeding tactics and social structure are among the primary determinants of the level and distribution of genetic variation in a population, giving rise to genetic structure. However the effects of such behaviors are neither intuitively obvious nor predictive. Interpretations of genetic interactions are hampered by a lack of suitable underlying models and the resulting weak empirical data base means that we are presently unable to answer fundamental questions such as whether the social structure exhibited by a species has any necessary or consistent relationship with the extent of genetic population structure in the species. In this review I present a brief overview of recent theoretical models, and summarise results of the two most common empirical approaches; namely, genetic comparison of identified social groups, and studies of arbitrarily selected samples. Some recommendations are made with respect to future empirical investigations. Increased sophistication in classifying social complexity will be necessary to elucidate the effects of social structure and breeding tactics on partitioning of genetic variation, and to determine the true correlation between social level and genetic structure.

20

Landscape pattern and genetic structure of a yellow-necked mouse Apodemus flavicollis population in north-eastern Poland

84%

Gortat T., Gryczynska-Siemiatkowska A., Rutkowski R., Kozakiewicz A., Mikoszewski A., Kozakiewicz M.

Acta Theriologica

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2010

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tom 55

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nr 2

109-121

Reduced connectivity among local populations inhabiting a spatially heterogeneous landscape may restrict gene flow and thus contribute to diminished genetic variation within a population. The aim of this study was to determine the role of geographic distance and habitat barriers in developing genetic structure of a yellow-necked mouse Apodemus flavicollis (Melchior, 1834) population, taking into consideration the spatial organization of the landscape. A field study was carried out in two plots located in NE Poland that differed considerably in terms of the scale of habitat fragmentation: (1) a continuous forest complex, and (2) a mosaic of smaller forest habitats. The plots were separated by a water barrier comprised of a chain of lakes. DNA samples from a total of 654 individuals were examined by microsatellite analysis (5 loci). The results showed that the yellow-necked mouse population was characterized by a poorly pronounced genetic structure throughout the study area, although the statistical significance of F ST for most location pairs indicated that gene flow in the area was not free. The division of the mouse population into three genetically distinct groups clearly demonstrated the significant role of water bodies as a natural barrier effectively hindering free movement of animals and thus gene flow. Analysis of the genetic structure of the mouse population throughout the study area and also within the distinguished groups indicated that the entire study population may be considered as a single metapopulation. Our results suggest that geographic distance alone is not the predominant factor affecting the genetic structure of population, but in the mosaic landscape the relative isolation of individual forest fragments, and barriers hindering movements of individuals and limiting gene flow among local populations played a much more important role.

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