scholarly journals The mating system in a Scots pine clonal seed orchard in Poland

1991 ◽  
Vol 48 (4) ◽  
pp. 443-451 ◽  
Author(s):  
J Burczyk
Keyword(s):  
Mating System ◽  
Scots Pine ◽  
Seed Orchard ◽  
Clonal Seed Orchard

Mating system estimates and effective population numbers for an isolated noble fir (Abiesprocera) clonal seed orchard in Denmark

1996 ◽  
Vol 26 (7) ◽  
pp. 1135-1141 ◽  
Author(s):  
Hans R. Siegismund ◽  
Erik D. Kjær ◽  
Ulrik Bräuner Nielsen
Keyword(s):  
Mating System ◽  
Seed Orchard ◽  
Allele Frequencies ◽  
Homogeneous Distribution ◽  
Effective Population ◽  
Population Number ◽  
Clonal Seed Orchard ◽  
Isozyme Loci ◽  
Noble Fir ◽  
Population Numbers

The mating system of a seed orchard of noble fir (Abiesprocera Rehd.) in Denmark was analyzed, with variation being found at two unlinked isozyme loci. Comparison of allele frequencies in the pollen pool fertilizing the upper and the lower parts of the trees showed a homogeneous distribution. There was no difference in the outcrossing rates estimated for cones harvested at the top and the lowermost branches carrying cones. Both were slightly greater than 1, as was the combined estimate that did not differ significantly from 1. The clones present in the seed orchard are outcrossing, and the allele frequencies found in the pollen pool agree with the frequencies found in the clones of the seed orchard on average. However, the allele frequencies varied significantly between the 20 families, suggesting that the pollen pool has been variable within the seed orchard. The inbreeding and variance effective population numbers were estimated by assuming that the differences in flowering reflected variation in gamete contribution from the clones to the offspring. The inbreeding effective population number was found to be 65% of the total number of clones. The variance effective population number was 121% of the number of clones when it was assumed that a large number of offspring were harvested from every clone.

scholarly journals Seed productivity and variability of Scots pine (Pinus sylvestris L.) clones of Finnish origin in seed orchard in the central part of Ukraine

2020 ◽  
Vol 62 (1) ◽  
pp. 1-12
Author(s):  
Ihor Neyko ◽  
Olena Kolchanova ◽  
Veronika Monarkh ◽  
Svitlana Poznyakova
Keyword(s):  
Climate Change ◽  
Scots Pine ◽  
Local Population ◽  
Seed Orchard ◽  
Climatic Conditions ◽  
Reproductive Capacity ◽  
Seed Productivity ◽  
Seed Orchards ◽  
Clonal Seed Orchard ◽  
The Mean

AbstractGlobal climate change has mainly impacted the forest ecosystems in Europe. Today, it is not fully understood how these changes will affect the reproductive process of trees on seed orchards. The main aim of the study is to evaluate the growth, condition and reproductive function of Scots pine clones of Finnish origin after moving them to the southern direction of natural distribution area. Variability and seed productivity of 25-year-old clones of Scots pine of Finnish origin in the clonal seed orchard under climatic conditions of the central part of Ukraine (Vinnitsa region) was investigated. Grafted seedlings of Scots pine of Finnish origin were moved southward at a distance of over 1,500 km. Climatic conditions of Vinnytsia region, where the clones were displaced, differed by an increase in the mean and maximum temperatures by 3.3–3.6ºC, as well as an increase in the mean temperatures during the cold period and a rise in the minimum by 2.1–2.3ºC. The climate in the seed orchard location was characterized by the most significant increase in the mean temperatures in April and May (5.3–5.8ºC), which greatly influenced the intensity of the formation of microstrobili and macrostrobili. The ratio of precipitation to the amount of temperatures decreased more than twice. Analysis of the grafted trees’ vitality of Finnish origin and seed progeny of the local population, estimation of their intensity (height, diameter), state (category of the state) and reproductive processes (intensity of formation of microstrobili and cones) was carried out on the clonal seed orchard. In conditions of climate change, most of the clones of Finnish origin were characterized by a higher intensity of flowering compared to the local population. Some clones of Finnish origin (E80 and E729) dominated the local population by the seed yield. According to a comprehensive analysis of vitality, the intensity of growth and reproductive capacity, the best clones of Finnish origin were E80, E1883 and E2254. Low adaptive ability was noted in the clones E2312, K634 and K801. According to the research results, it was found that changes in climatic conditions did not significantly affect the vitality, development and condition of the clones. There was observed intensification of the formation of microstrobili and cones. Seed viability and quality of Scots pine of Finnish origin obtained on seed orchards located in the southern conditions requires further research.

scholarly journals Identification of Pinus sylvestris clones with highest and lowest allelopathic potential

2019 ◽  
Vol 25 (1) ◽  
Author(s):  
Ernest Bielinis ◽  
Jacek Kwiatkowski ◽  
Sergii Boiko
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Seed Orchard ◽  
Inhibitory Effect ◽  
Test Plant ◽  
Allelopathic Potential ◽  
Clonal Seed Orchard ◽  
Wide Range ◽  
Germination And Growth ◽  
Distribution In Europe

Allelopathy is a kind of interaction between plants in which the inhibitory effect on growth and germination can play an important role during the struggle for existence in interspecific competition. The species (or clone of one species) with a higher allelopathic potential might win the competition and place themselves in a better biosocial position for growth. Also, the clones with a lower allopathic potential might be useful in agroforestry, e.g.  as trees useful for shading the crops. The allelopathic potential of Scots pine (Pinus sylvestris L.), the tree species with a wide range of distribution in Europe and of great economic importance, was estimated in this study. To this end, needles from trees growing in a clonal seed orchard were collected and used as a material to obtain water leachates. The leachates were diluted to 25 and 50% and used in allelopathy tests. The differences between potentials of leachates from Scots pine clones to inhibit germination and growth of the test plant (Sinapis alba L. cv. Borowska) were assessed. The clones 1702 and 1703 were characterized as highly allelopathic, with the potential confirmed in two independent allelopathic tests. The clones 355 and 2209 were characterized as clones with a moderate allopathic potential. The possibility of selecting clones with the known allelopathic potential for the successful use in forestry was discussed.

scholarly journals Mating system and gene flow of Nothofagus alpina (Poepp. & Endl.) Oerst. in a clonal seed orchard

2017 ◽  
Vol 47 (1) ◽  
Author(s):  
Luz Cecilia García Cruzatty ◽  
Ricardo Riegel ◽  
Magaly Rivero ◽  
Judith Carrasco ◽  
Fernando Droppelmann
Keyword(s):  
Gene Flow ◽  
Mating System ◽  
Seed Orchard ◽  
Clonal Seed Orchard

The mating system in a black spruce clonal seed orchard

1987 ◽  
Vol 17 (5) ◽  
pp. 379-382 ◽  
Author(s):  
J. W. Barrett ◽  
P. Knowles ◽  
W. M. Cheliak
Keyword(s):  
Mating System ◽  
Population Size ◽  
Effective Population Size ◽  
Gene Pool ◽  
Black Spruce ◽  
Seed Orchard ◽  
Effective Population ◽  
Isozyme Markers ◽  
Clonal Seed Orchard ◽  
Mating Population

Isozyme markers were used to study the mating system, estimate the effective population size, and determine the effective gene pool composition in a black spruce clonal seed orchard. Ten seeds per family were electrophoretically analyzed by embryo and megagametophytic pairs to determine their allelic and genotypic frequencies at five polymorphic loci. Single-locus estimates of outcrossing ranged from 0.682 to 1.087 (mean, 0.942), while the multilocus estimate was 0.837. The variance effective population size was calculated to be 17 individuals, comprising 13 receptive females and 4 effective males. Evidence of gene pool heterogeneity suggested a small, nonrandomly mating population within the clonal seed orchard.

scholarly journals Estimation of Genetic and Phenotypic Parameters for Growth Traits in a Clonal Seed Orchard of Pinus kesiya in Malawi

ISRN Forestry ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Edward Missanjo ◽  
Gift Kamanga-Thole ◽  
Vidah Manda
Keyword(s):  
Growth Traits ◽  
Seed Orchard ◽  
Direct Selection ◽  
Tree Model ◽  
Individual Tree ◽  
Individual Level ◽  
Clonal Seed Orchard ◽  
Pinus Kesiya ◽  
Individual Tree Model ◽  
The Individual

Genetic and phenotypic parameters for height, diameter at breast height (dbh), and volume were estimated for Pinus kesiya Royle ex Gordon clonal seed orchard in Malawi using an ASReml program, fitting an individual tree model. The data were from 88 clones assessed at 18, 23, 30, 35, and 40 years of age. Heritability estimates for height, dbh, and volume were moderate to high ranging from 0.19 to 0.54, from 0.14 to 0.53, and from 0.20 to 0.59, respectively, suggesting a strong genetic control of the traits at the individual level, among families, and within families. The genetic and phenotypic correlations between the growth traits were significantly high and ranged from 0.69 to 0.97 and from 0.60 to 0.95, respectively. This suggests the possibility of indirect selection in trait with direct selection in another trait. The predicted genetic gains showed that the optimal rotational age of the Pinus kesiya clonal seed orchard is 30 years; therefore, it is recommended to establish a new Pinus kesiya clonal seed orchard. However, selective harvest of clones with high breeding values in the old seed orchard should be considered so that the best parents in the old orchard can continue to contribute until the new orchard is well established.

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