Genetic Variability of Hymenoscyphus pseudoalbidus on Ash Leaf Rachises in Leaf Litter of Forest Stands in Poland

2013 ◽  
Vol 162 (4) ◽  
pp. 218-227 ◽  
Author(s):  
Wojciech Kraj ◽  
Tadeusz Kowalski
Keyword(s):  
Genetic Variability ◽  
Leaf Litter ◽  
Forest Stands ◽  
Hymenoscyphus Pseudoalbidus

Influence of Habitat Fragmentation on the Genetic Variability in Leaf Litter Ant Populations in Tropical Rainforests of Sabah, Borneo

2006 ◽  
Vol 15 (1) ◽  
pp. 157-175 ◽  
Author(s):  
Tobias O. Bickel ◽  
Carsten A. Brühl ◽  
Jürgen R. Gadau ◽  
Bert Hölldobler ◽  
K. Eduard Linsenmair
Keyword(s):  
Habitat Fragmentation ◽  
Genetic Variability ◽  
Leaf Litter ◽  
Tropical Rainforests

scholarly journals Are we narrowing genetic variability in seed orchards? An attempt to answer, based on the analysis of microsatellite DNA of grafts growing in Scots pine (Pinus sylvestris L.) seed orchard in the Forest District Susz

2015 ◽  
Vol 76 (3) ◽  
pp. 240-249
Author(s):  
Paweł Przybylski
Keyword(s):  
Genetic Variability ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Microsatellite Dna ◽  
Molecular Genetic ◽  
Seed Orchard ◽  
Dna Fragments ◽  
Forest Stands ◽  
Seed Orchards ◽  
Forest District

Abstract Scots pine (Pinus sylvestris L.) is the most common species in Poland’s forest stands. The mode of pine stands renovation requires that silviculture practitioners have continuous access to seed banks. Orchard-grown seeds are predicted to constitute an increasingly larger part of the average demand for pine seeds in Poland. Seed orchards, due to a limited number of maternal trees as well as the irregularity of their blooming and pollination, enhance the risk of genetic diversity reduction in planted forest stands. This is of particular importance in the context of dynamic climate change. Markers based on microsatellite DNA fragments are effective tools for monitoring genetic variability. In the present study, three different microsatellite DNA fragments were used: SPAC 12.5, SPAG 7.14 and SPAC 11.4. The main objective of this research was to study genetic variability in one of the biggest seed orchards in Poland, located in the Forest District Susz. The obtained results indicated heterozygosity loss within the orchard, proving the existence of specimen selection effects on genetic variability. Hence, it seems quite important to take account of molecular genetic variability of maternal trees in future breeding strategies.

scholarly journals Studying the genetic structure of Quercus robur forest stands on anthropogenically transformed territories using introns of the β-tubulin gene

2018 ◽  
Vol 26 (4) ◽  
pp. 269-275
Author(s):  
Y. V. Pirko ◽  
A. E. Demkovich ◽  
L. O. Kalafat ◽  
Y. B. Blume ◽  
О. А. Lykholat
Keyword(s):  
Genetic Structure ◽  
Genetic Variability ◽  
Quercus Robur ◽  
Spatial Genetic Structure ◽  
Anthropogenic Factors ◽  
Forest Stands ◽  
Individual Level ◽  
Information Index ◽  
Tubulin Genes ◽  
Β Tubulin

Based on the analysis of the intron polymorphism of β-tubulin genes, the genetic variability of old Quercus robur L. trees from “Holosiivsky” NPP was investigated. The genotyping of 55 old Q. robur trees was carried out; 40 polymorphic and one monomorphic (about 880 bp) TBR fragments were found. High frequency (70–90%) of occurrence of fragments with an approximate molecular weight of 275, 490, 500, and 1110 bp was observed.The genetic polymorphism of old Q. robur trees was assessed as quite high: РІС is 0.22 – 0.39, the effective number of alleles per locus was 1.174–1.268. The Shannon information index was in the range of 0.204–0.269.The geographical differentiation of the genetic structure of centuries-old oak trees from “Holosiivsky” NPP was not pronounced. The share of inter-selection genetic variability (AMOVA) accounts for about 6% of genetic variability, and the geographic component – about 1%. Around 93% of genetic variability is concentrated on the individual level. Using the ТВР method, we found that Q. robur forest stands do not have a stabilized genetic and visible spatial structure, but at the same time they possess a sufficiently large genetic diversity. The absence of a spatial genetic structure may indicate the artificial origin of Q. robur trees from different seed materials, and also that a small number of the plants have survived to this time. In this case, the main influence on the structure of oak stands in “Holosiivsky” NPP was from anthropogenic factors, both in the form of cutting down trees and, possibly, the introduction of alien seed material.

scholarly journals Situation of damage caused by Cryphonectria parasitica to forest stands and orchards of Castanea sativa by 2001 in Slovakia

2011 ◽  
Vol 31 (No. 3) ◽  
pp. 102-108 ◽  
Author(s):  
G. Juhásová ◽  
K. Adamčíková ◽  
H. Ivanová ◽  
M. Kobza
Keyword(s):  
Genetic Variability ◽  
Castanea Sativa ◽  
Cryphonectria Parasitica ◽  
Health Condition ◽  
Forest Stands ◽  
Castanea Sativa Mill ◽  
Degree Of Damage ◽  
Biological Protection

In the present paper the knowledge of evaluation of the health condition of Castanea sativa (Mill.) in forest stands was summarised. It was found out that the fungus Cryphonectria parasitica (Murr.) Barr damaged the coppices until 60 years. Degree of damage (I<sub>hc</sub>) in the evaluated localities ranged from 1.11 to 3.50. Between 1992 and 2001 the biological protection in orchards by the method of hypovirulent converted strains from France was used. This method had not been used in forest stands until then. The efficiency of canker treatment ranged from 38.9% to 64.9%. On the basis of genetic variability of C. parasitica isolates they were classified into 4 vegetative-compatible (v-c) groups. &nbsp;

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