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Wyszukujesz frazę "genetic drift" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
The local populations of the fungus Schizophyllum commune Fr. as drivers of its biodiversity
Autorzy:
Boiko, Sergiy
Powiązania:
https://bibliotekanauki.pl/articles/2040907.pdf
Data publikacji:
2021
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
Schizophyllum commune
gene drift
genetic structure
local populations
terrain
Opis:
Changes that occur on the local level can explain the processes on the population level and, at the same time, are the driving force of species adaptation. This manuscript reports data about genetic diversities of the fungus Schizophyllum commune on the level of a local population. Objects of the study were dicarious cultures of S. commune collected from 38 basidiocarps grown on the territory of Holosiivskyi National Nature Park, Lysa Hora Regional Landscape Park and Feofaniya forest parcel (Ukraine). Results showed similarity of genetic variability of S. commune in different local populations. The heterozygote deficiency of some loci that was discovered might have resulted from new forms of allozymes that have not become widespread or due to small population sizes. The degree of differentiation of genes between local studied populations was moderate due to the high flow of genes. The absence of spatial structuration of genotypes is established, and the Mantel test showed a lack of interconnection between the genetic component and the geographical coordinates of the samples. It has been suggested that wind direction and terrain are the factors that influence the genetic structure of local populations.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 4; 308-316
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The “Mysterious” Kazlauskas: Exploring Lithuania’s Most Frequent Surname
Autorzy:
Walkowiak, Justyna B.
Powiązania:
https://bibliotekanauki.pl/articles/971883.pdf
Data publikacji:
2016-12-01
Wydawca:
Polska Akademia Nauk. Instytut Języka Polskiego PAN
Tematy:
surname frequency
Lithuanian surnames
surname loss
genetic drift
Opis:
The article presents the most frequent surname in Lithuania — Kazlauskas. Referring to the article “Mysterious Lewandowski” by K. Skowronek (2000), an attempt has been made to account for this frequency in three various ways. First, the principles behind the quantitative structure of anthroponomasticons (Zipf’s law) and the loss of surnames (genetic drift) are discussed. Then the Slavic origin of the surname under consideration has been highlighted as a typical trait of the majority of surnames in Lithuania. In connection with this fact, it has been stressed that caution must be exercised in proposing a thesis on its origin as a translation from Lithuanian on a mass scale, since this thesis requires plentiful empirical evidence. Finally, the etymology of the name is analyzed. Morphologically it is a typical surname derived from a toponym. This supposition is additionally supported by the existence in Poland of numerous localities called Kozłów, Kozłowo or similar name; these in turn are most likely to have been derived from appellative-based personal names of their owners or inhabitants, such as Kozieł.
Źródło:
Onomastica; 2016, 60; 175-186
0078-4648
Pojawia się w:
Onomastica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diffusion limit for the phenomenon of random genetic drift
Autorzy:
Marciniak, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1208221.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
genetic drift
telegraph equations
singularly perturbed systems
diffusion equation
random walk
Opis:
The paper deals with mathematical modelling of population genetics processes. The formulated model describes the random genetic drift. The fluctuations of gene frequency in consecutive generations are described in terms of a random walk. The position of a moving particle is interpreted as the state of the population expressed as the frequency of appearance of a specific gene. This leads to a continuous model on the microscopic level in the form of two first order differential equations (known as the telegraph equations). Applying the modified Chapman-Enskog procedure we show the transition from this system to a macroscopic model which is a diffusion type equation. Finally, the error of approximation is estimated.
Źródło:
Applicationes Mathematicae; 2000, 27, 1; 81-101
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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