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    Wyświetlanie 1-4 z 4
    Tytuł:
    Genetic variability in N, P, K utilization efficiency in spring wheat at different concentration of nutrient solutions.
    Autorzy:
    Oracka, Teresa
    Ciepły, Jan
    Kozdój, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2198778.pdf
    Data publikacji:
    2000-12-20
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    spring wheat
    genetic variability
    nitrogen
    phosphorus
    potassium utilization efficiency
    Opis:
    From the ecological and economic points of view it is necessary to change agricultural practice towards low- input cultivation systems. This requires breeding of new cultivars with improved utilization efficiency of mineral nutrients. The response of fifty spring wheat cultivars representing different origin and years of release (from 1990 to 1996) to different concentrations of the Hoagland nutrient solution was investigated under controlled conditions (climatic chamber). A wide variability in N, P, K contents, their utilization efficiency and production of dry matter was found among wheat cultivars at the shooting phase of plant development at all nutrient concentrations applied. The variability coefficient decreased with the increasing concentration of Hoagland solution. Old Polish cultivars (released 1900 – 1960) and most of the intermediate cultivars (released 1961 – 1980) showed high of N, P, K utilization efficiency. The modern cultivars (released after 1981) showed either high or low N, P, K utilization efficiency. This efficiency was determined by dry matter (r= 0.94 - 0.98) and N, P, K contents (r= 0.62 - 0.94). The majority of spring wheat cultivars showed almost linear response of the evaluated parameters to increased nutrient concentration in Hoagland solution. It was been proved that genetic variability of N, P, K utilization efficiency can be assessed as early as at shooting phase.
    Źródło:
    Plant Breeding and Seed Science; 2000, 44; 15-25
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sieci neuronowe typu MLP w prognozowaniu plonu jęczmienia jarego
    MLP artificial neural networks in predicting the yield if spring barley
    Autorzy:
    Janaszek-Mańkowska, Monika
    Mańkowski, Dariusz R.
    Kozdój, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2198009.pdf
    Data publikacji:
    2011-03-31
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    jęczmień jary
    MLP
    linie DH
    prognozowanie plonu
    sztuczne sieci neuronowe
    artificial neural networks
    DH lines
    spring barley
    yield prediction
    Opis:
    U roślin zbożowych, poszczególne cechy plonotwórcze oraz struktura morfologiczna kłosa kształtują się w określonych fazach rozwojowych, które zachodzą w zmiennych warunkach środowiska. Interakcja genotypu z biotycznymi i abiotycznymi czynnikami środowiska w trakcie trwania okresu wegetacji roślin również wpływa na kształtowanie się wielkości plonu. W niniejszej pracy dokonano aproksymacji wielkości plonu na podstawie cech, charakteryzujących nie tylko okres wegetacji roślin, ale także fazę ich pełnej dojrzałości. Do aproksymacji wykorzystano sieć MLP o bardzo prostej topologii, wynikającej zarówno z liczby, jak i struktury dostępnych danych. Efekt wytrenowania sieci był pozytywny. Uzyskane wyniki wyraźnie wskazują, iż sieć typu MLP może służyć jako narzędzie wspomagające prognozowanie plonu jęczmienia jarego.
    In cereal plants, individual yielding characteristics and the morphological structure of the spike are formed in certain phases of development, which occur in varying environmental conditions. The interaction of genotype with the biotic and abiotic environmental factors during the period of vegetation also affects the formation of yield. In this paper we approximate the yield on the basis of traits that characterize not only the vegetation period, but also the phase of full maturity. For the approximation, an MLP network with a very simple topology, resulting from both the number and structure of available data, was used. The effect of network training was positive. The results obtained show clearly that the MLP network may be used as a support tool for the prediction of the yield of spring barley.
    Źródło:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2011, 259; 93-112
    0373-7837
    2657-8913
    Pojawia się w:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Equation Model as a Tool to Assess the Relationship Between Grain Yield Per Plant and Yield Components in Doubled Haploid Spring Barley Lines (Hordeum Vulgare L.)
    Autorzy:
    Mańkowski, Dariusz R.
    Kozdój, Janusz
    Janaszek-Mańkowska, Monika
    Powiązania:
    https://bibliotekanauki.pl/articles/2199661.pdf
    Data publikacji:
    2016-06-20
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    doubled haploids
    Hordeum vulgare L.
    Structural Equation Modeling (SEM)
    yield related traits
    Opis:
    The aim of this study was to describe and characterize the relationships between yielding factors and grain yield per doubled haploid (DH) plant of spring barley as well as relation between yield components and duration of each stage of plant development. To describe these relations structure equation modeling was used. The study included plants of doubled haploid spring barley lines (Hordeum vulgare L.) derived from tworowed form of Scarlett cultivar. The SAS® system was used to analyze the model of relationships between grain yield per plant and yield components. Our results indicate that the number of spikes per plant and grain yield per spike had a direct and decisive influence on the grain yield of the investigated DH plants of spring barley. Based on the path model analysis it was found that the most important factor determining grain yield per DH plants of spring barley was the number of spikes per plant and the duration of tillering and shooting stages.
    Źródło:
    Plant Breeding and Seed Science; 2016, 73; 63-77
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Yield and Yield Related Traits Variability of Winter Wheat (Triticum Aestivum L.) Cv. Izolda and Double Haploid Lines
    Autorzy:
    Kozdój, Janusz
    Mańkowski, Dariusz R.
    Godzina-Sawczuk, Monika
    Czaplicki, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2199643.pdf
    Data publikacji:
    2015-12-20
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    winter wheat
    doubled haploids
    yielding
    yield related traits
    Opis:
    The yield-forming potential of winter wheat is determined by several factors, namely total number of shoots per plant and total number of spikelets per spike. The field experiments were conducted during three vegetation seasons at the Plant Breeding and Acclimatization Institute – National Research Institute (PBAI– NRI), located in Radzików, Poland. The objective of this study was a comparative analysis of the structural yield-forming factor levels, which determine grain yield per spike and per plant of the DH lines and standard Izolda cultivar. Results indicate that several DH lines showed some differences in tested morphological structures of plant, yield factor levels and in grain yield per spike and per plant in comparison to standard Izolda, regardless of the year. Mean grain yield per plant of DH lines was 26.5% lower in comparison to standard Izolda only in the second year of study. It was caused by a reduction of productive tillers number. Structural yield-forming potential of DH lines was used in 38% and 59% and in case of Izolda in 47% and 61% (the second and the third year of experiment, respectively). The mean grain yield per spike of DH lines was 14.8% lower than Izolda cultivar only in third year of experiment and it was caused by about 12% lower number of grains per spike. Structural yield-forming potential of DH spikes was used in 82.4%, 85.4% and 84.9% and in case of Izolda in 83.8%, 87% and 89.5% (the first, the second and the third year of experiment, respectively). The grain yield per winter wheat plant (both DH lines and standard Izolda) was significantly correlated with the number of productive tillers per plant (r = 0.80). The grain yield per winter wheat spike (both DH lines and Izolda cultivar) was significantly and highly correlated with the number of grains per spike (r = 0.96), number of fertile spikelets per spike (r = 0.87) and the spike length (r = 0.80). Variation of spike and plant structural yield-forming factors determining grain yield levels were also analyzed. Calculated total variation coefficients values of each analyzed trait during three-year long studies were different depending on plant material – DH lines or standard Izolda. Low variation coefficients values characterized following traits (traits ranked by increasing values for DH lines and standard Izolda, respectively): total spikelets number per spike (6.6 and 6.3%), spike length (11.1 and 12.6%), fertile spikelets number per spike (13.7 and 11.7%), single grain weight (15.0 and 12.2%), shoot length (16.2 and 13.3%), grains number per spikelet (26.4 and 23.3%), total shoots number per plant (23.4 and 29.6%), grains number per spike (30.1 and 28.2%). Higher variation coefficients values were obtained for the following traits: grain yield per spike (40.0 and 35.7%), plant immature tillers number (35.8 and 42.6%), plant productive tillers number (42.2 and 43.2%), spike sterile spikelets number (46.6 and 44.7%) and number of grains per plant (58.3 and 60.5%). The highest values characterized grain yield per plant (66.9 and 60.8%).
    Źródło:
    Plant Breeding and Seed Science; 2015, 72; 33-53
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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