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1

Analiza wynikow 35-letniego doswiadczenia proweniencyjnego z sosna zwyczajna [Pinus sylvestris L.]

100%
Rozkowski R.
Arboretum Kórnickie
|
1999
|
tom 44
73-86
2
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Flowering of Picea abies (L.) Karst. clones of Istebna origin in the Kórnik seed orchard

63%
Chalupka W., Rozkowski R.
Dendrobiology
|
2004
|
tom 51 Supplement
The flowering and graft mortality of Norway spruce clones of Istebna origin was only slightly different from clones of other origin in the same seed orchard. The negative effect ofmoving Istebna clones from the south to the north of their origin was probably compensated by moving them from a higher altitude to lowland. There is a danger that the complete loss of several clones, observed in the seed orchard with time,may really decrease the expected level of genetic variation in the progeny. It is recommended that the mortality of grafts and the reduction in the number of clones in the seed orchard should be under permanent observation.
3

Kwitnienie i zamieranie szczepow swierkowych [Picea abies [L.] Karst.] w 1993 roku na modelowej plantacji nasiennej w Korniku

63%
Chalupka W., Rozkowski R.
Arboretum Kórnickie
|
1995
|
tom 40
107-115
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Ocena polskich ras debu szypulkowego [Quercus robur L.] i bezszypulkowego [Quercus petraea [Matt.]Liebl] testowanych w doswiadczeniu proweniencyjnym w Korniku

63%
Fober H., Rozkowski R.
Sylwan
|
2006
|
tom 150
|
nr 11
3-13
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effect of polluted environment on the female and male strobili bearing of European Scots pine provenances

63%
Chalupka W., Rozkowski R.
Dendrobiology
|
2000
|
tom 45
Studies on female and male strobili production as well as on pollen production and viability were performed at a polluted (Luboń) and a control (Kórnik) sites. Female strobili bearing per tree and total length of male strobili produced per tree were significantly higher in Luboń than in Kórnik and the stand density and tree crown exposition to sunlight were likely responsible for that result. Percentage of pollen germination was not affected by any variables studied. Neither provenance nor provenance x site interactions were found.
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Proweniencje modrzewia dla Polski

63%
Rozkowski R.
Sylwan
|
2000
|
tom 144
|
nr 01
87-107
7
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Provenance contribution to genetic composition of progeny from outbreeding seed orchard of Picea abies

51%
Chalupka W., Misiorny A., Rozkowski R.
Dendrobiology
|
2009
|
tom 61 Supplement
The abundant flowering, observed in 2004 in a model outbreeding seed orchard established in Kórnik, Poland, promoted crossing between clones of five geographically distant populations of Norway spruce. The clones were selected from a group of ca. 1100 provenances participating in the international IUFRO 1964/68 experiment and performing best in terms of growth traits and adaptability. In the seed orchard, 91.3% of clones and 64.1% of grafts produced female and/or male strobili. Statistically significant differences between the clones were only found in the number of mature cones produced. The mean number of mature cones in individual clones was also significantly correlated with the latitude of the place of origin of maternal populations (r = 0.88, p = 0.047). The nearly equal percentages of clones representing each of the five populations in the outbreeding seed orchard (from 23.2 to 17.5%) resulted finally in the highly unequal production of full seeds by each population (from 62.9 to 0.7%). These data provide evidence to suggest that the level of genetic diversity in the progeny, expected from the number of growing clones, diverges from the level resulting from the contribution of clones to the full seed production which is an effective measure of the genetic composition of progeny. To avoid this divergence, an outbreeding seed orchard could be established with unequal proportions of clones from different provenances, considering the knowledge of their flowering phenology, and individual variation in flowering and cone production.
8

Symplastic isolation in norway spruce embryonic shoot during dormancy

51%
Guzicka M., Rozkowski R., Pawlowski T.
Acta Societatis Botanicorum Poloniae
|
2010
|
tom 79
|
nr Suppl.1
9
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Early evaluation of open pollinated offspring from Polish seedling seed orchards of Pinus sylvestris L.

51%
Rozkowski R., Chalupka W., Misiorny A., Giertych M.
Dendrobiology
|
2007
|
tom 57
35-48
Field trials with open-pollinated progeny of Scots pine were established in 2004 at five climatically different sites of the Polish lowlands. This long-term experiment was aimed to compare the genetic variation and genetic value of the offspring of twenty two seedling seed orchards and two second-generation seed orchard with the offspring of the local so-called economic seed stands, which are the main source of seeds for artificial regeneration of Scots pine in Poland. The early evaluation of quantitative traits of cones, seeds and 1-year-old seedlings attests to remarkable variation between the studied populations. Significant linear correlatios were found between some of the studied traits.
10

1,3-beta-glucan in vegetative buds of Noway spruce during dormancy

51%
Guzicka M., Rozkowski R., Pawlowski T.
Acta Biologica Cracoviensia. Series Botanica. Supplement
|
2009
|
tom 51
|
nr 2
11
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Cechy przyrostowe i jakościowe modrzewia polskiego [Larix decidua subsp. polonica (Racib.) Domin] z Góry Chełmowej w 37-letnim doświadczeniu rodowym

51%
Rozkowski R., Chmura D., Chalupka W., Guzicka M.
Sylwan
|
2011
|
tom 155
|
nr 09
12
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Ocena zasobów genowych świerka istebniańskiego na powierzchniach zachowawczych in situ i ex situ

51%
Mlynarczyk A., Sabor J., Banach J., Rozkowski R.
Sylwan
|
2011
|
tom 155
|
nr 10
13
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Early height growth of Scots pine (Pinus sylvestris L.) progenies from Polish clonal seed orchards

51%
Chmura D. J., Giertych M., Rozkowski R.
Dendrobiology
|
2003
|
tom 49
Seed orchards are expected to produce geneticaly improved seeds while maintaining a sufficiently large genetic diversity. Field trials comparing open-pollinated Scots pine progeny from seed orchards and commercial seed stands were established at five climaticaly different sites in Poland. The paper presents first height measurements obtained on trees at age 4. Seedlots differed significantly, but there was no strong evidence of better performance of clonal seed orchards progeny over the progeny of production seed stands. There was no distinct geographical trend in the origin of the best growing seedlots, but populations from the northern part of country tend to perform better than south-eastern ones. Progeny of the local production seed stands at their native environment were not the best, except in one case. A strong site effect reflecting a fertility gradient of the planting sites was found.
14
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Zmienność proweniencyjna olszy czarnej w Polsce

45%
Rozkowski R., Mejnartowicz L., Guzicka M., Dorobek K., Chmura D. J.
Sylwan
|
2019
|
tom 163
|
nr 10
European black alder (Alnus glutinosa (L.) Gaertn.) is a widespread tree species associated with wetlands and riparian ecosystems, thus it plays an important ecological role. Due to its fast growth and favorable wood properties it also has a potential to satisfy a growing demand for wood and fiber. However, its growth potential is not fully realized in Poland. In this study we investigated variation in growth traits, productivity, and stem straightness among 11 populations of European black alder originating from the lowland distribution of the species in Poland. The common−garden experiment located in 1968 in Kórnik (mid−western Poland) has been so far the only provenance experiment with this species in our country. We measured height and diameter of all trees at the site, assessed stem straightness in a 5−step scale (1−crooked; 5−straight), and calculated productivity at age of 50 years, which should be considered close to the rotation age. We found significant variation among populations in all investigated traits. The difference in productivity between the best and the worst provenance reached 75%. Using published and unpublished data from previous measurements at this site we also analyzed a trend in provenance ranking through time. The best and worst provenance could be identified at age 16 years, but many ranking shifts took place afterwards at the intermediate rank positions. We conclude that growth, productivity and stem quality of black alder could be improved through selection of favorable provenances within the species. Selection decisions can be made at the age below the half the rotation age, although decisions at ¾ of rotation age would be more precise.
15
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Produktywność biomasy nadziemnej i podziemnej w doświadczeniu proweniencyjno-rodowym z dębem szypułkowym

39%
Chmura D. J., Guzicka M., Rozkowski R., Michalowicz D., Grodzicki W., Chalupka W.
Sylwan
|
2014
|
tom 158
|
nr 11
The biomass productivity of individual trees at age 14 years was investigated in the experiment with 8 provenances and 186 half−sib families of pedunculate oak (Quercus robur L.). The aim of the study was to develop allometric equations and estimate heritability of tree biomass. We sampled 28 model trees and measured dry mass of their components, including roots (on 14 trees). A decreasing share of aboveground biomass was allocated to stems, and an increasing share to branches and foliage with increasing tree size. Also a decreasing share of total tree biomass was found in roots with increasing tree dimensions. Allometric equations involving diameter at breast height in combination with tree height were developed to model biomass of all components and whole tree. We used those equations to estimate tree biomass on the sub− set of research area, involving all provenances and 180 half−sib families. Heritability coefficients for tree biomass were the greatest for provenances (0.84), average for families (0.58) and the lowest for individual trees (0.18). However, estimates of family heritability varied by provenance (from 0.18 to 0.74). These findings suggest that the most efficient strategy for improvement of productivity in pedunculate oak would be selection of provenances and families within provenances.
16
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Changes in the gene pool composition of Scots pine depending on the mode of regeneration

39%
Zukowska W. B., Lewandowski A., Wojkowicz B., Litkowiec M., Rozkowski R., Urbaniak L., Kowalczyk J.
Dendrobiology
|
2023
|
tom 89
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