Szerző szerinti böngészés "Varga, J."
Megjelenítve 1 - 3 (Összesen 3)
Találat egy oldalon
Rendezési lehetőségek
Tétel Szabadon hozzáférhető Fruit set and yield of pear cultivars as affected by reduced bee pollination period(2009-09-02) Benedek, P.; Varga, J.Results of our experiments prove that pear is more or less sensitive to the reduced bee pollination period. However, the reaction (or the sensitivity) of cultivars may be different to the reduced bee pollination. Most cultivars produce much less yield under reduced bee pollination or no yield with the exclusion of bees but in the case of some cultivars total exclusion of bees does not prevent the yield formation and what is more sometimes reduced bee pollination can be resulted in somewhat higher yield than open pollination. Typical reaction, however, is a significant yield reduction with reduced bee pollination. Pear seems to be somewhat less sensitive to the partial reduction of bee pollination period than apple or quince. The first half of the flowering period seems to be more important in yield formation because usually higher yield was resulted when pear cultivars received open pollination in the first than in the second half of the blooming period. Based on our experimental results no definite relationship between parthenocarpic capacity of cultivars and the yield under reduced bee pollination can be established. So reduced bee pollination does not seem to contribute the parthenocarpic fruit formation in pear.Tétel Szabadon hozzáférhető Selection of the chance seedlings of `Mézes körte' (Pyrus communis L.) from the gene bank of Keszthely(2007-03-19) Varga, J.; Iváncsics, J.; Kocsisné Molnár, G.; Nyéki, J.We have concluded the selection tests of the `Mézes körte' seedlings planted in the spring of 2006, with special emphasis on the cotyledonary, foliage leaf and the height of plant. Out of the 75 seeds planted in rows, there were 40-45 pieces growing out, so during the first cotyledonary test we had to calculate with almost 40% decay. On 12th April 2006, we recorded some of the important characteristics of the seedlings in their cotyledonary stage which characteristics were important from the point of view of selection (cotyledonary form, cotyledonary length, cotyledonary thickness, cotyledonary colour, cotyledonary petiole length, cotyledonary petiole thickness, cotyledonary petiole colour). The above morphological characteristics are shown in Table No. 1-6. We have also tested the seedling in foliage leaf state, paying special attention on the development stage of the plants (colour of foliage leaf , height of plant). We have completed statistical calculations of the two above mentioned characteristics. The result of that is summarised in Table No. 8-9. The variation coefficient show smaller value in the case of the foliage leaf number (15-32%), while the wider range of spread of the data referring to the height of the plant is shown by the 33-61% CV values. On charts No 4-9. we present the relationship between the height of the plant and the number of foliage leaf, as well as the differences between the two graphs. Based on the above charts and graphs it can be defined that the 40% destruction of the developing seedlings during the period till the next measurement reached 70-80% level. In spite of this however some seedlings showed strong and balanced growth (A 44 , B 42 , C 25 , D 16 , E 5 , E 39 , F 38 ), the further testing and selection of those is to be completed in the future.Tétel Szabadon hozzáférhető Sexual and vegetative compatibility genes in the aspergilli(2007) Pál, Károly; Diepeningen, Anne D. van; Varga, J.; Hoekstra, Rolf F.; Dyer, Paul S.; Debets, Alfons J. M.