scholarly journals Estimation of genetic parameters of cone and seed characteristics in clonal seed orchard of spheroid Scots pine

2018 ◽  
pp. 240-245
Author(s):  
Murat Alan
Keyword(s):  
Scots Pine ◽  
Genetic Parameters ◽  
Seed Orchard ◽  
Clonal Seed Orchard ◽  
Seed Characteristics ◽  
Estimation Of Genetic Parameters

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 GENETIC GAIN FROM DIFFERENT SELECTION METHODS IN Eucalyptus macarthurii PROGENIES IN DIFFERENT ENVIRONMENTS

CERNE ◽  
2016 ◽  
Vol 22 (3) ◽  
pp. 299-308 ◽  
Author(s):  
Mara Luana Engel ◽  
Antônio Rioyei Higa ◽  
Gisela Pedrassani Andrejow ◽  
Paulo César Flôres Junior ◽  
Izabele Domingues Soares
Keyword(s):  
Genetic Gain ◽  
Genetic Parameters ◽  
Mixed Model ◽  
Phenotypic Expression ◽  
Seed Orchard ◽  
Joint Analysis ◽  
Selection Methods ◽  
Effective Population ◽  
Clonal Seed Orchard ◽  
Selection Of

ABSTRACT The aims of this research was to estimate genetic parameters of Eucalyptus macarthurii progenies and to predict genetic gain for different selection methods. In order to evaluate the gains, eleven progenies tests were studied. These tests were installed in 1997, in randomized blocks design, in two sites, with 5 replicates of five plants per plot. The progenies were evaluated, from the first to the eighth year, regarding the variable diameter at breast height (DBH). The genetic parameters were estimated using the mixed model procedure (REML/BLUP). The selection of the progenies for establishing a Clonal Seed Orchard was based on the analysis by location, joint analysis and on the harmonic mean of the relative performance of genotypic values (HMRPGV) with different selection intensities among and within families: three, four, five and six individuals per progeny with the selection of the top 30 individuals, taking into consideration the effective population size (N e ). The best age to carry out the selection was seven years old, however, early selection can be made from age two onwards. Each environment characteristics influenced progenies phenotypic expression, so the higher gains in balance with N e , were estimated with the selection of individuals for each site, and the selection of five or six individuals per progeny.

Estimation of genetic parameters associated with frosty pod rot (Moniliophthora roreri) and cacao production in Mexico

2021 ◽  
Vol 17 (3) ◽  
Author(s):  
José Luis Solís Bonilla ◽  
Uilson Vanderlei Lopes ◽  
Alfredo Zamarripa Colmenero ◽  
Biaani Beeu Martínez Valencia ◽  
Carlos Hugo Avendaño Arrazate ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Moniliophthora Roreri ◽  
Frosty Pod Rot ◽  
Estimation Of Genetic Parameters
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