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System korzeniowy zbóż jako obiekt badań genetyczno-hodowlanych

100%

Gorny A. G.

nr 4

Zarys genetyki owsa [rodzaj Avena L.]

100%

Gorny A. G.

2005

tom 14

311-422

Evaluation of the response to limited water, nitrogen and phosphorus supply in spring barley genotypes selected for vigorous seminal roots

100%

Gorny A. G.

tom 37

nr 1

Fourteen F₅- and F₆-pedigrees, previously selected for a more vigorous seminal root system in a cross population of spring barley, were compared with their parents in the response to severe post-sowing drought and limited N- and P-supply. The materials were studied in glass-faced soil boxes, sand-vermiculite cultures and in the field. The F₅'s juvenile rooting superiority was not totally preserved for further growth stages suggesting partly different genetic backgrounds responsible for the seminal root system at various growth stages. Results indicated an absence of close genetic correlations between the seminal and adventitious root systems. The selected spring barley pedigrees exhibiting a more vigorous rooting benefit much more for their ability to avoid drought conditions than for their tolerance to nitrogen and phosphorus limitations. Especially under decreased N availability, the enhanced root extension in F₅ₛ resulted in a depressed shoot dry matter production. Despite a relatively low differentiation in the grain yield, some of the selected F₆-pedigrees were simultaneously found to indicate a high yield potential, an improved stability or tolerance to low-input.

Genetic variation in root development and its associations with N and P use efficiency in spring barley under high and low nutrition

100%

Gorny A. G.

tom 35B

Genetics of roots in cereal responses to water and mineral stresses

88%

Gorny A. G.

nr 3 suppl.

Genetic variation in the efficiency of nitrogen utilization and photosynthetic activity of flag leaves among the old and modern germplasm of winter wheat

51%

Gorny A. G. , Garczynski S. , Banaszak Z. , Lugowska B.

nr 3

Genotypic variation in major components of the efficiency of nitrogen utilization and photosynthetic activity of flag leaves among old (released 1881-1963) and modern (released 1969-2003) cultivars of winter wheat was studied in field conditions under varied N fertilization levels (110, 90 and 80 kg N ha⁻¹). Significant genotypic differences were observed for all characters. Their heritabilities ranged from 0.37 to 0.93 and were the lowest for the leaf efficiency of gas exchange, photosynthetic rate, straw N content and the economic index of N utilization efficiency (NUE). Some modern cultivars exhibited an enhanced tolerance to N shortage and several attributes of efficient N utilization (e.g. later senescing and more photosynthetically active flag leaves, increased ability to redistribute N into grains). The genotypes may serve as donors of appropriate characteristics for breeding. The observed cultivar-by-fertilization interactions suggest, however, that evaluations under diverse fertilization regimes may be necessary when searching for improved wheat efficiency and adaptation to less favourable environments.

QTLs for earliness and yield-forming traits in the Lubuski x CamB barley RIL population under various water regimes

26%

Ogrodowicz P. , Adamski T. , Mikolajczak K. , Kuczynska A. , Surma M. , Krajewski P. , Sawikowska A. , Gorny A. G. , Gudys K. , Szarejko I. , Guzy-Wrobelska J. , Krystkowiak K.

nr 1