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    Wyświetlanie 1-15 z 15
    Tytuł:
    Impact of extreme climate years on relative "yield - evapotranspiration" relationships
    Wpływ ekstremalnych warunków klimatycznych na względną zależność "plon - ewapotranspiracja"
    Autorzy:
    Mladenova, B.
    Varlev, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/293375.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    ewapotranspiracja
    klimat
    kukurydza
    plon
    współczynnik reakcji roślin na niedobory wody
    climate
    evapotranspiration
    maize
    yield
    yield response factor
    Opis:
    The relative relationships "yield - evapotranspiration" were used long time ago. The well known linear relationship yi = 1 - ky (1 - ei), where yi is relative yield, ky - yield response factor and ei - relative evapotranspiration was proposed. It's usually assumed that ky is constant for a given crop and climatic conditions. It was found, however, that ky for late variety of maize H 708 varied through the study years (1984-1990) in the Plovdiv region ( South Bulgaria , altitude 150 m). During the dry years it was significantly higher than in the medium and humid years. The range of ky for maize in this location was 1.12-1.90, the average value being 1.50. The climate in the Sofia region (the experimental field of Chelopechene, altitude 550 m) is comparatively more humid. The two regions approximately outlined the boundaries of the appropriate economical conditions for grain maize production. The experiments in the Sofia region were carried out in the years 1994-2000. The seven years results for mean variety maize showed that the relationships "yield - evapotranspiration" and, respectively, ky varied at these climatic conditions too. The highest ky value was 1.41 for the driest year (2000) and the lowest value - 1.05 for the most wet years (1995, 1999). The value of ky for average years was 1.21. The yield response factor ky is of more significance when the relative evapotranspiration is less than 0.7-0.8. Thus, the extreme or the average values of ky could be used for the corresponding climatic regions. The relationships between ky and relative yield were established without considering irrigation.
    W pracy przedstawiono wyniki badań nad plonami i ewapotranspiracją dwóch mieszańców kukurydzy. Badania te prowadzono w różnych okresach siedmioletnich w dwóch odmiennych klimatycznie regionach Bułgarii. Analizowane regiony wyznaczają granice obszarów opłacalnej uprawy kukurydzy na ziarno w tych warunkach klimatycznych. Przedstawiono analizę wartości wskaźnika ky w latach suchych, średnich i mokrych. Wykazano wyraźne zależności korelacyjne między plonami a ewapotranspiracją, potwierdzone bardzo wysokimi wartościami współczynników determinacji R2. Wartości ewapotranspiracji aktualnej ETa i potencjalnej ETm wyznaczono na podstawie zaleceń FAO. Badania udowodniły, że wartość ewapotranspiracji może ulec istotnej zmianie w wyniku ewentualnej zmiany klimatu. Już obecnie obserwuje się w Bułgarii wzrost temperatury i zmniejszenie opadów atmosferycznych, co może mieć duży wpływ na plonowanie roślin uprawnych.
    Źródło:
    Journal of Water and Land Development; 2007, 11; 71-77
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recognition and determination of related traits importance with seed yield in chickpea (Cicer aietinum)
    Autorzy:
    Ghorbani, Tayebeh
    Cheghamirza, Kianoosh
    Bardideh, Kosar
    Shoar, Parastoo Basiri
    Powiązania:
    https://bibliotekanauki.pl/articles/2199728.pdf
    Data publikacji:
    2013-12-19
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    chickpea
    factor analysis and cluster analysis
    path analysis
    yield
    yield components
    Opis:
    To study the relationship between seed yield and its components 5 varieties and 18 different genotypes of Cicer arietinum were evaluated. This study was carried out under dryland farming during 2007 in research farm of Razi university. Path analysis showed that in the first level of yield, the highest direct effect was related to biological yield and the highest indirect effect was related to seed number per plant due to biological yield. In second level of yield due to the seed number per plant double seed pod number had the highest direct effect and the highest indirect effect was related to hundreds seed weight due to double the seed pod number. In second level of yield due to biological yield, the highest direct effect was related to high plant and the highest indirect effect was related to high plant due to second branch number. In the third level of yield due to a hundred seed weight, the highest direct effect was related to pod diameter and the highest indirect effect was related to pod length due to pod diameter. Factor analysis showed that 5 factors explained 81.65 percent of the variance. Cluster analysis based on ward method were arranged genotypes in 3 clusters.
    Źródło:
    Plant Breeding and Seed Science; 2013, 68; 15-24
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Immunization and convex interest rate shifts
    Autorzy:
    Barber, J. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/206488.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    immunization
    yield curve
    linear factor model
    convexity
    Opis:
    An important issue in immunization theory is the form of the interest rate process under which immunization is feasible. This paper generalizes Fisher and Weil immunization result to convex interest rate shifts, and examines the practical significance of this generalization. We examine the features of a linear factor model that are consistent with a convex shift. In particular, we show that a specific two factor linear model is sufficient and necessary for a convex shift. This two factor specification allows parallel and damped yield curve shifts, which in combination can twist the yield curie.
    Źródło:
    Control and Cybernetics; 2013, 42, 1; 259-266
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Life Factor Approach to the Yield Prediction: a Comparison with a Technological Approach in Reliability and Accuracy
    Autorzy:
    Lykhovyd, Pavlo
    Powiązania:
    https://bibliotekanauki.pl/articles/124852.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    artificial neural network
    life factor
    multiple linear regression
    technological factor
    yield modelling
    Opis:
    There are a number of various approaches to the development of yield predictive models in agriculture. One of the most popular ones is based on the yield modeling from the parameters of crop cultivation technology. However, there is another view on the yield prediction models, which is based on the use of life factors as yielding parameters. Our study is devoted to the comparison of a conventional technological approach to the yield prediction with a less prevalent approach of life factor based yield modeling. The testing of two approaches was performed by using the yielding data of sweet corn cultivated in the field trials under the drip-irrigated conditions of the Southern Ukraine, under the different technological treatments, viz. plowing depth, nutrition, and crop density. We developed two multiple linear regression models to compare their efficiency in the yielding predictions. One of the models used cultivation technology parameters as the inputs while the other used life factors as the inputs. Life factors were expressed in numeric values by using the following converter: total water consumption of the crop was used as the factor of water, the total sum of positive temperatures was used as the factor of heat, and the total sum of the main nutrients (NPK) available in the soil was used as the factor of nutrition. The results of the study proved an equal accuracy and reliability of the studied models of sweet corn yields, which is obvious from the values of RSQ. RSQ of the both studied regression models was 0.897. However, additional check of the modeling approaches applied in the feed-forward artificial neural network showed that the life factor based model with the RSQ value of 0.953 provided better yield predictions than the technologically based model with the RSQ value of 0.913. Therefore, we concluded that the life factor approach should be preferred to the technological approach in the development of yield predictive models for agriculture.
    Źródło:
    Journal of Ecological Engineering; 2019, 20, 6; 177-183
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sulphur as a factor that affects nitrogen effectiveness in spring rapeseed agrotechnics. Part I. Chosen yield components
    Siarka jako czynnik kształtujący efektywność azotu w agrotechnice rzepaku jarego. Część I. Wybrane elementy plonowania
    Autorzy:
    Barczak, B.
    Skinder, Z.
    Piotrowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/46657.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
    Tematy:
    fertilization
    sulphur
    nitrogen
    effectiveness
    spring rapeseed
    rapeseed
    agrotechnical factor
    yield component
    Opis:
    Strict, three-year-long field experiment was performed on degraded Phaeozems, IIIb soil valuation class, with pH ranging from 6.5 to 7.1, of high richness in phosphorus and potassium, medium in magnesium, and low in sulphur. The experiment was carried out in a split-block design with two factors in four repetitions. The aim of the study was to evaluate the effect of various doses of nitrogen (0, 60, 120, and 180 kg·haˉ¹ ) and sulphur (0, 20, and 60 kg·haˉ¹ ), taking into account their different application methods (in-soil and as foliar fertiliser), on the yield components of spring rapeseed cultivar Star. Fertilisation only with nitrogen significantly increased the values of all the studied components, while the sulphur-only fertilisation increased the number of seeds in siliques, as well as the mass of 1000 grains. The number of seeds per silique in none of the research years was significantly affected by the interaction between nitrogen and sulphur. As far as other characteristics are concerned, considering sulphur alongside nitrogen fertilisation, in general, resulted in a significant increase in their values, in comparison with the control plants.
    Podstawą badań było trzyletnie ścisłe doświadczenie polowe przeprowadzone na czarnej ziemi zdegradowanej, klasy bonitacyjnej IIIb, o obojętnym odczynie, wysokiej zasobności w fosfor i potas oraz niskiej w siarkę. Doświadczenie realizowano w układzie równoważnych bloków z dwoma czynnikami, w czterech powtórzeniach. Celem badań była ocena wpływu zróżnicowanych dawek azotu (0, 60, 120 i 180 kg·haˉ¹ ) i siarki (0, 20 i 60 kg·haˉ¹ ), z uwzględnieniem różnych sposobów jej aplikacji (doglebowo i dolistnie), na elementy plonowania rzepaku jarego odmiany Star. Wyłączne nawożenie azotem istotnie zwiększało wartości wszystkich badanych elementów, wyłączne nawożenie siarką – tylko liczbę nasion w łuszczynach oraz wartość MTN. Tylko liczba nasion w łuszczynach w żadnym z lat badań nie była istotnie kształtowana przez interakcję azotu i siarki. W przypadku pozostałych cech uwzględnienie w nawożeniu siarki obok azotu powodowało na ogół istotny wpływ na kształtowanie ich wartości w porównaniu z kontrolą.
    Źródło:
    Acta Scientiarum Polonorum. Agricultura; 2016, 15, 3
    1644-0625
    Pojawia się w:
    Acta Scientiarum Polonorum. Agricultura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The model CORNWAY - a tool for analysingn the relation between soil-water regime and the yield of maize [Zea mays L.]
    Autorzy:
    Majercak, J.
    Novak, V.
    Vidovic, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/24194.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    CORNWAY model
    Zea mays
    soil water
    corn
    grain yield
    GLOBAL model
    stress factor
    yield
    water regime
    maize
    Źródło:
    International Agrophysics; 1996, 10, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of selected agricultural factors on the yielding of spaghetti squash (Cucurbita pepo L.)
    Wpływ wybranych czynników agrotechnicznych na plonowanie dyni makaronowej (Cucurbita pepo L.)
    Autorzy:
    Wadas, W.
    Kalinowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/11541838.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    agricultural factor
    yielding
    squash
    spaghetti squash
    Cucurbita pepo
    plant cultivation
    yield quality
    sowing date
    plant spacing
    yield
    climate condition
    fruit
    plant cultivar
    fruit colour
    fruit size
    agrotechnical factor
    Opis:
    Spaghetti squash is an interesting novelty in Poland. Popularization of spaghetti squash cultivation in our country requires development of agricultural recommendations. The size and the quality of yield is highly affected by the sowing date and plant population. The paper presents the results of a four-year study on the effect of the sowing date (5, 15 and 25 May) and plant spacing (1 × 0.6 m, 1 × 0.8 m and 1 × 1 m, ie. 16,668, 12,500 and 10,000 plants per ha) on the yield of spaghetti squash (‘Makaronowa Warszawska’ and ‘Pyza’) under the soil and climatic conditions of central-eastern Poland. The highest yield per hectare and the largest number of marketable fruits per plant was obtained while sowing on 5 May. Delaying the sowing date resulted in a decrease in the yield per hectare and of the number of marketable fruits per plant, although the average weight of a marketable fruit sown on 15 and 25 May did not significantly differ in comparison to sowing on 5 May. Increasing the spacings between plants from 1 × 0.6 m to 1 × 1 m resulted in decreasing the yield per hectare, but the number of marketable fruits per plant was larger. Plant spacing did not have a significant effect on the average weight of a marketable fruit. The yield per hectare for the ‘Pyza’ was larger in comparison to the ‘Makaronowa Warszawska’. The number of marketable fruits per plant did not significantly differ, but the weight of the ‘Pyza’ fruit was higher.
    Dynia makaronowa jest interesującą nowością w Polsce. Rozpowszechnienie uprawy dyni makaronowej w naszym kraju wymaga opracowania zaleceń agrotechnicznych. Duży wpływ na wielkość i jakość plonu ma termin siewu i obsada roślin. W 4-letnich badaniach określano wpływ terminu siewu (5, 15 i 25 maja) i rozstawy roślin (1 × 0,6 m, 1 × 0,8 m i 1 × 1 m, tj. 16 668, 12 500 i 10 000 roślin na 1 ha) na plonowanie dyni makaronowej (‘Makaronowa Warszawska’ i ‘Pyza’) w warunkach glebowo-klimatycznych środkowowschodniej Polski. Największy plon z 1 ha i największą liczbę owoców handlowych z jednej rośliny uzyskano przy siewie 5 maja. Opóźnienie terminu siewu powodowało zmniejszenie plonu z 1 ha i liczby owoców handlowych z jednej rośliny, ale średnia masa owocu handlowego przy siewie 15 i 25 maja nie różniła się istotnie w porównaniu z siewem 5 maja. Zwiększenie rozstawy roślin z 1 × 0,6 m do 1 × 1 m powodowało zmniejszenie plonu z 1 ha, ale liczba owoców handlowych z jednej rośliny była większa. Rozstawa roślin nie miała istotnego wpływu na średnią masę owocu handlowego. Plon z 1 ha odmiany ‘Pyza’ był większy niż odmiany ‘Makaronowa Warszawska’. Liczba owoców handlowych z jednej rośliny nie różniła się istotnie, ale masa owoców odmiany ‘Pyza’ była większa.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2010, 09, 2; 93-101
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of dietary crude protein on slaughter yield of selected broiler stocks
    Autorzy:
    Melo, J E
    Miquel, M.C.
    Mallo, G.
    Ciacciariello, M.
    Villar, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043626.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    selection level
    genetics
    slaughter yield
    broiler strain
    commercial strain
    environmental factor
    dietary protein
    body composition
    protein content
    Źródło:
    Journal of Applied Genetics; 1999, 40, 3; 219-231
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dependence of the photosynthesis quantum yield in oceans on environmental factors
    Autorzy:
    Wozniak, B.
    Dera, J.
    Ficek, D.
    Ostrowska, M.
    Majchrowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48279.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    primary production
    water temperature
    quantum yield
    environmental factor
    bio-optical modelling
    nutrient content
    phytoplankton
    chlorophyll
    irradiance
    photosynthesis
    Opis:
    Statistical relationships between the quantum yield of photosynthesis and selected environmental factors in the ocean have been studied. The underwater irradiance, nutrient content, water temperature and water trophicity (i.e. the surface concentration of chlorophyll Ca(0)) have been considered, utilizing a large empirical data base. On the basis of these relationships, a mathematical model of the quantum yield was worked out in which the quantum yield Φ is expressed as a product of the theoretical maximum quantum yield ΦMAX = 0.125 atomC quanta−1 and six dimensionless factors. Each of these factors fi appears to be, to a sufficiently good approximation, dependent on one or two environmental factors and optical depth at most. The model makes it possible to determine the quantum yield from known values of these environmental factors. Empirical verification of the model yielded a positive result – the statistical error of the approximate values of the quantum yield Φ is 42%.
    Źródło:
    Oceanologia; 2002, 44, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Territorial differences of climate change impact on Romanian crop production
    Autorzy:
    Szocs, E.
    Biro, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/572418.pdf
    Data publikacji:
    2009
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    climate change
    Romania
    crop production
    crop yield
    regional differentiation
    territorial differentiation
    agriculture
    meteorological factor
    regression analysis
    statistical relationship
    econometric model
    crop structure
    climatic factor
    agricultural product
    Opis:
    Effects of the climate change appear in several fields of the economy and agriculture can be considered as one of the most affected among them. In a country, where almost 10% of the total GDP is produced by the agricultural sector and more than 30% of the total work force is employed in this field, these changes may have severe economic impacts. As in Romania almost 65% of the agricultural production is represented by vegetal production, we concentrate our investigations on this agricultural sector. Our aim is to present, basing on econometric modeling, how the climate changes will affect the Romanian crop production in the next 20 years, highlighting the territorial differences which appear between the Romanian NUTS2 development regions. This paper presents some of the first results of the FP6 research project “CLAVIER – Climate Change and Variability: Impact on Central and Eastern Europe”, contract no. 037013 (2006-2009).
    Źródło:
    Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2009, 06(21)
    2081-6960
    Pojawia się w:
    Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of physical factors for seed quality improvement of horticultural plants
    Autorzy:
    Krawiec, M.
    Dziewulska-Hunek, A.
    Kornarzynski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2020.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Ogrodnictwa
    Tematy:
    horticultural plant
    seed quality
    improvement
    agricultural practice
    physical factor
    laser light
    magnetic field
    magnetized water
    seed germination
    yield
    Źródło:
    Journal of Horticultural Research; 2018, 26, 2
    2300-5009
    Pojawia się w:
    Journal of Horticultural Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of temperature and humidity on the grazing activity of Deroceras reticulatum (O. F. Muller, 1774) and the damage to rape plants
    Autorzy:
    Kozlowski, J.
    Jaskulska, M.
    Kaluski, T.
    Kozlowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/83902.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Tematy:
    temperature effect
    humidity
    grazing activity
    Deroceras reticulatum
    damage
    rape plant
    winter rape
    slug
    yield loss
    environmental factor
    air temperature
    Opis:
    Winter rape is susceptible to damage caused by D. reticulatum (O. F. Müller) mainly in the early phases of the plants’ development. The degree of damage and the size of yield losses depend on the slug population and the grazing activity, which are governed by many environmental factors. Laboratory studies were performed to analyse the rate and amount of damage to rape plants (2–3 leaf stage) caused by D. reticulatum, and the effect of temperature and soil humidity on the slug’s grazing activity. With increasing air temperature (up to 16°C) the amount of damage increased, but the effect was not lasting. The slugs were also active at low temperatures (+1°C), and although their grazing was less intense, the amount of damage after seven days could reach an average of 34%. In laboratory tests, the soil humidity had no marked effect on the amount of damage done by the slugs.
    Źródło:
    Folia Malacologica; 2011, 19, 4
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of the portion of functional PS2 reaction centres in the light of a fluorometric study
    Autorzy:
    Ficek, D.
    Ostrowska, M.
    Kuzio, M.
    Pogosyan, S.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/48365.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    marine phytoplankton
    variability
    quantum yield
    chlorophyll a
    optical depth
    PS2 reaction
    environmental factor
    photosynthetic apparatus
    sea
    fluorometric method
    light
    photosynthesis
    Opis:
    The paper contains a preliminary analysis of the links between the portion fc of functional PS2 reaction centres in the photosynthetic apparatus of marine phytoplankton and environmental factors. The analysis is based inter alia on fluorometric measurements of fc (see Kolber & Falkowski 1993) in water sampled from different depths and trophic types of sea. From the statistical generalisations was derived an analytical form of the relationship between fc, and the optical depth and trophic type of sea (the trophicity index was taken to be the surface concentration of chlorophyll a). According to this relationship, fc rises as the trophicity of the sea does so. Moreover, there is a certain optimal optical depth for each type of water at which the number of functional PS2 reaction centres reaches a maximum. Above or below this depth the value of fc falls. At the present stage of investigations it seems reasonable to assume that this drop in the number of functional PS2 reaction centres close to the surface is due to the destructive effect of excessive irradiance. On the other hand, their reduced number at greater depths, below the fc maximum, can be attributed to the deficit of light and the consequent destruction of reaction centres.
    Źródło:
    Oceanologia; 2000, 42, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The TDP method of seed yield component analysis in grain legume breeding
    Autorzy:
    Golaszewski, J
    Idzkowska, M.
    Milewska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044235.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    breeding population
    path analysis
    stem
    treatment factor
    multiple regression
    yield component
    grain legume
    multivariate method
    seed
    two-dimensional partitioning method
    Vicia faba
    ontogenesis
    plant height
    fruiting node
    broad bean
    fodder pea
    Pisum sativum
    Opis:
    The results of plant breeding trials with populations of fodder pea strains and broad bean hybrids were the basis of consideration on the interrelationship between some traits - the yield structure elements. Developed by Eaton, a relatively new method of yield component analysis called the two-dimensional partitioning method (TDP) was applied to analyse the data. The method, which combines multiple regression and ANOVA, allows for concise tabular presentation and simple interpretation of the distribution of traits in one direction and the sources of variance according to ANOVA model in the other direction. Additionally, the interpretation of the results was supported by such standard statistical techniques as ANOVA, simple and multiple regression and path analysis. The main components of pea yielding were plant height and the number of pods per plant. Among the analysed characters of broad bean the number of nodes with pods on the main stem, which turned out to be the determinant of broad bean yielding, might be strongly affected by environmental conditions. The number of nodes with pods might be considered a selecting character of high potential yielding of broad bean genotypes.
    Źródło:
    Journal of Applied Genetics; 1998, 39, 4; 299-308
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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