Growth Differences in the Progeny Trials of the Scots Pine (<i>Pinus sylvestris</i> L.)

Kurm, Malle; Kiviste, Andres; Kaur, Ursula; Maaten, Tiit

doi:10.2478/v10132-011-0070-1

Cited by 2 publications

(2 citation statements)

References 7 publications

(6 reference statements)

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“…Assessment of plus trees of coniferous species by the growth of their seed progenies in different ecological environmental is carried out in many countries around the world (Danusevicius & Lindgren, 2004;Stoehr et al, 2004;Kroon et al, 2007;Kurm et al, 2009;Berlin et al, 2015;Ivković et al, 2015;Lai et al, 2017). Breeding values of plus trees were estimated by the research of individual plus trees progenies (Lee, 2002) and by the common garden experiment testing of seed orchards (Chmura et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Progeny testing of Pinus sylvestris L. of seed orchard in different environmental conditions

Mazhula¹,

Fuchylo²,

Hayda

et al. 2021

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Evaluation of the progeny test of plus trees of Scots pine - a necessary condition for determining the prospects the use of improved seeds in different environmental conditions. The paper presents the results of the study of the progeny test of groups of clones of plus trees of Scots pine selected according to certain characteristics in Northern Steppe and South Forest-Steppe of Ukraine. Analysis of results showed: a significant improvement in the growth rates of the all testing progenies of seed orchard in the better climatic and soil conditions of South Forest-Steppe between the ages of 3 and 10 years. At the same time 4 out of 5 studied progenies worsened their growth indicators relative to local control at the age of 3 to 26 years in less optimal climatic and soil conditions of Northern Steppe. The leader in the steppe conditions was the progeny of a fraction of three clones, which had the highest seed productivity. The selection of the fastest growing clones and the rejection of the slowest growing ones had a positive effect on the growth of progenies of seed orchards at both test points.

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Section: Introductionmentioning

confidence: 99%

Progeny testing of Pinus sylvestris L. of seed orchard in different environmental conditions

Mazhula¹,

Fuchylo²,

Hayda

et al. 2021

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“…In view of these circumstances, it is important to ensure sufficient quantitative representation of clones in seed-bearing plantations [42,[56][57][58][59]. Nevertheless, it is a fact that plus selection based on mass selection according to the phenotype of the best individuals of the natural populations remains the most effective strategy for the selective improvement of forests in many countries up to the present day [60][61][62][63][64]. While the problem of the effectiveness of plus selection has long been discussed in the literature [65][66][67][68][69], unambiguous solutions or exhaustive answers to all the questions put forward by the selection process have yet to be found.…”

Section: Introductionmentioning

confidence: 99%

Physiological Differentiation of the Plus Trees of Scots Pine: Seasonal Status of Xylem

Nn¹,

Vp²,

Na³

et al. 2018

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An important moment in the establishment of forestry seed orchards is the formation of their optimal composition, avoiding inbreeding depression in the outgoing seed material which occurs due to crossbreeding between closely related plus trees, the clones of which comprise the orchards. It is possible to minimize the negative effect of inbreeding by considering the hereditary aspect of the heterogeneous seed orchard material. The purpose of our work is to provide a comparative assessment of the formation and lignification of xylem in annual shoots of the plus trees of Scots pine. We investigated the formation and lignification of xylem in the annual shoots of the plus trees of Scots pine (Pinus sylvestris L.), found in natural forests in the Nizhny Novgorod region of the Russian Federation. Their vegetative progeny were cultivated in the clone archive stationed in the same region. Analyzing the one-type of the 1-year shoots, the time that the shoots were cut from the branches corresponded to the presence of plants in the characteristic phenological phases of seasonal development. A histochemical study of xylem was conducted, using the qualitative reactions of phloroglucinol to lignin. The power of xylem development was estimated by counting, in the radial direction, the cell rows from the core to the cambium in the microscope’s field of view. A significant differentiation of plus trees was revealed in a complex of signs characterizing the level of xylem development and the degree of xylem cell lignification in the tissues of annual shoots. Phenotypic differences in the physiological state of plus trees appeared given a leveled ecological background, indicating their genotypic determinism. This was confirmed by an analysis of variance. The share of the influence of differences between the proper plus trees was between 25.16%  ± 8.91% and 53.98%  ± 5.48% of the total phenotypic variance of the signs of the seasonal state of xylem. Factor analysis was used to reduce the number of considered indicators of xylem physiological state. The results allowed a cluster analysis to be carried out on the basis of the normalized values of the initial xylem features as well as the principal components derived from them. The association of plus trees was done on the basis of the similarity of the multidimensional estimates of xylem seasonal condition. The objects that were the most remote from the others were identified. This information provides a reasonable approach to the formation of an assortment of Scots pine seed orchards.

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Growth Differences in the Progeny Trials of the Scots Pine (Pinus sylvestris L.)

Cited by 2 publications

References 7 publications

Progeny testing of Pinus sylvestris L. of seed orchard in different environmental conditions

Progeny testing of Pinus sylvestris L. of seed orchard in different environmental conditions

Physiological Differentiation of the Plus Trees of Scots Pine: Seasonal Status of Xylem

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