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The present research was undertaken to determine the incompatibility and to characterize its mechanisms in crossing of chrysanthemum (Dendranthema grandiflora [Chrysanthemum morifolium]) cultivars. Seed set of crossing of 'Monalis...
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The present research was undertaken to determine the incompatibility and to characterize its mechanisms in crossing of chrysanthemum (Dendranthema grandiflora [Chrysanthemum morifolium]) cultivars. Seed set of crossing of 'Monalisa' and 'Lineker White' with the pollen from four other cultivars was higher than that of the other cultivars. Since the seed set ratio was over 5%, 'Monalisa' and 'Lineker White' were cross-compatible. The other cultivars showed only 1-3% seed set and Wyking' and 'Jeongheungsung' showed no seed set. According to microscopic observations, there were obvious incompatible characteristics after pollination. Pollen swelled less because of low hydration and a small quantity of secretion was found on the stigma. The stigmatic papillae were filled with callosic deposits. The pollen did not germinate properly and showed short and coiled or bulbous pollen tube. Fluorescence microscopic observations showed that the pollen was prevented from germination or stigmatic penetration. The data suggest that the crossed chrysanthemum cultivars have similar characteristics of sporophytic self-incompatibility..
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The response of Rosa hybrida cv. Kardinal rose plants to temperature was measured to develop a model for predicting rose flower size for a range of greenhouse conditions. The number of days from bud break (BB) to flowering increas...
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The response of Rosa hybrida cv. Kardinal rose plants to temperature was measured to develop a model for predicting rose flower size for a range of greenhouse conditions. The number of days from bud break (BB) to flowering increased from 21.6 to 63.0 days as temperature decreased from 30 to 15鳦. The number of days to flower was primarily influenced by the temperature after the visible bud (VB). This suggests that the temperature before VB may not significantly affect the rate of flower development. Leaf area, stem length and stem diameter generally increased with decreasing temperature, but the best quality of stems was observed at 18鳦. Flower dry weight, however, increased from 0.7 to 3.0 g as temperature decreased from 30 to 15鳦. When plantswere moved to lower temperature at VB stage, flower dry weight increased. Temperature has its most pronounce influence on flower development during the period between VB and flowering so that during commercial greenhouse rose production any reduction intemperature during that period can result in increasing the size of rose flower buds.
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The effects of various treatments to the stigma to overcome varietal crossing incompatibility in chrysanthemum were investigated. The female parent materials used were the cultivars Relance, Lineker White, Wembley, Vyking, Monalis...
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The effects of various treatments to the stigma to overcome varietal crossing incompatibility in chrysanthemum were investigated. The female parent materials used were the cultivars Relance, Lineker White, Wembley, Vyking, Monalisa, Euro White and Jeongheungsung, and the male parent materials were Sei Alps, Baeksokuk, and Yeonja. Stigmas were treated with distilled water (control), ethanol, organic solvents (hexane, ethylacetate), vitamins (folic acid, nicotinic acid), amino acids (alanine, arginine, glycine), and plant growth regulators (IAA, NAA, benzyladenine) at the concentrations of 200 and 400 mg/litre. IAA and nicotinic acid produced more seed set than the control. All amino acids used in this experiment contributed to increasing seed set. Some cultivars showed increased seed set with the crossing of two pollens (SeiAlps and Yeonja), whereas the others showed only increment with SeiAlps. According to the microscopical observations, low callosic deposit, no secretion on the stigma, and collapsed papillae were observed in compatible crosses, and also effective solution treatments. The solution treatments of amino acids, IAA, and nicotinic acid to stigmas can be recommended to be more effective than the other solutions to overcome the inhibition of incompatibility in varietal crossing of chrysanthemums. The method is practical and easy to treat on plants with no other equipments, and the effects on the increasing of seed set were also satisfactory..
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Various treatments on stigma and pollen to overcome varietal crossing incompatibility in chrysanthemum cultivars (Relance, Lineker Salmon, Lineker White, Wembley, Vyking, Monalisa, Euro White and Jeongheungsung as female parents, ...
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Various treatments on stigma and pollen to overcome varietal crossing incompatibility in chrysanthemum cultivars (Relance, Lineker Salmon, Lineker White, Wembley, Vyking, Monalisa, Euro White and Jeongheungsung as female parents, and Sei Alps, Baeksokuk and Yeonja as male parents) were investigated. Pollinated plants were maintained in growth chambers for 24 h under high temperature (30 and 35 degrees C). Pollen grains for pollination were treated at 40 degrees C for 60 minutes or at 50 degrees C for 30 minutes, and 50% of these seeds were also treated at low temperature (-20 degrees C) for 24 h after the high temperature treatment. Seed set following the high temperature treatment of stigma and pollen was higher than that of the control in most of the cultivars. Treatment of the stigma was found to be more effective than treatment of the pollen. Some cultivars showed increased seed set when crossed with Baeksokuk and Yeonja, whereas the others showed increment in seed set only when crossed with Yeonja. Low callose deposit, no secretion on the stigma, and collapsed papillae were obtained with compatible crosses and effective temperature treatments..
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A new spray chrysanthemum cultivar 'Prima Donna' was released by National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), in 2008. The cross was made between 'Piano' and 'Yeonja' in 2...
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A new spray chrysanthemum cultivar 'Prima Donna' was released by National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), in 2008. The cross was made between 'Piano' and 'Yeonja' in 2005. Trials were conducted from 2006 to 2008 for the evaluation and selection of this cultivar, including shading cultures in summer and retarding cultures in spring. The natural flowering time of 'Prima Donna' is late October, but year-round flowering is possible by photo-periodic control. The cultivar has single type flowers with pink petals, green center and good inflorescence. The growth of plant is very vigorous. The diameter of flower is 7.0 cm. The number of flowers per stem and petals per flower are 13 and 42, respectively. Days to flowering under the short day treatment is about 59 and its vase life is 26.1 days in autumn season.
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A FA (Lilium formolongi x Lilium asiatic hybrid) intersectional hybrid lily cultivar 'Orange Crown' was developed in 2007 at National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA) of...
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A FA (Lilium formolongi x Lilium asiatic hybrid) intersectional hybrid lily cultivar 'Orange Crown' was developed in 2007 at National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA) of Korea. The cross and immature embryo rescue was conducted between female parents 'Migreen' (Lilium formolongi 'Raizan' x Lilium asiatic hybrid 'A61') and male parent 'A01-187' (L. asiatic 'A96-28' x 'Sanzio') by cut style pollination method at Suwon in 2001. It was preliminarily selected as 'FA04-27' in 2004. Multiplication, bulb production and characteristic tests were conducted from 2004 to 2007. The evaluation of characteristics and preference were surveyed at a lily flower show of NIHHS at Taean in 2007. 'Orange Crown' flowers in the late of June and grows more than 183 cm stem length. Flowers bloom upward-facing, a little spotted and orange (RHS, O24A) petals. The pollen of 'Orange Crown' was sterile.
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An Asiatic lily cultivar 'Yesol' was developed in 2005 at National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Korea. The cross was made in 1992 between Asiatic lily 'White Bird',...
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An Asiatic lily cultivar 'Yesol' was developed in 2005 at National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Korea. The cross was made in 1992 between Asiatic lily 'White Bird', a white colored cultivar, and 'Connecticut King', yellow colored cultivar. Preliminarily selection was done as 'A94-11' in 1994. Multiplication and bulb formation, and characteristic tests were conducted from 1996 to 2004. The evaluation of this line was performed and named as 'Wongyo C1-27' in 2005 that was registered as 'Yesol' to the registration office of Korea Seed & Variety Service. 'Yesol' flowers at the end of June and grows average 32.4 cm. It flowers upward-facing, yellow (RHS, Y7D) with the size of flower 14.7 cm. The average petal length and width are 8.2 cm and 2.6 cm, respectively. Leaves are 4.8 cm long and 2 cm wide. The weight and size of bulb are 18.9 g and 11.8 cm, respectively. Year-round flowering can be obtained by storing the bulb under -1.5 degrees C conditions.
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Among 4 different flower developmental stages, anthocyanin content was extremely decreased by high temperature when plants were exposed at bud opening stage for seven days. During that stage, anthocyanin content of 'Relance' flowe...
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Among 4 different flower developmental stages, anthocyanin content was extremely decreased by high temperature when plants were exposed at bud opening stage for seven days. During that stage, anthocyanin content of 'Relance' flowers subjected to 35/20 degrees C was ~48% that of flowers exposed to 25/20 degrees C. On the other hand, the colour response to high temperature differed between two red chrysanthemum cultivars, 'Relance' and 'Wembley'. Anthocyanin content of 'Relance' was reduced by 43.4% at high temperature (35/20 degrees C) when compared with those exposed to 25/20 degrees C. However, that of 'Wembley', which was less affected by temperature, resulted in only 10% reduction at 35/20 degrees C. The gene transcripts, especially dihydroflavonol reductase [dihydrokaempferol 4-reductase] (DFR) and anthocyanin synthase (ANS), were reduced extremely by high temperature in both cultivars. Reduction in flavanone 3-hydoxylase [naringenin 3-dioxygenase] (F3H) expression by high temperature was less in 'Wembley' than in 'Relance'.
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A New Cymbidium variety "Yellow Evening" was developed from a cross between "Oji" and "Valley Flower Cherry Life" followed by seedling and line selections at the National Institute of Horticultural and Herbal Science (NIHHS), Rura...
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A New Cymbidium variety "Yellow Evening" was developed from a cross between "Oji" and "Valley Flower Cherry Life" followed by seedling and line selections at the National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA) in 2004. After investigation of the characteristics and selection for 9 years (1996-2004), it has been selected specifically pot orchid flower. "Yellow Evening" has medium plant height and semi-erect peduncle. It has medium flowering habit and brownish yellow flowers (RHS, Y11B: petal and sepal) with grayed purple GPl83A spot on lip, when fully opened. Each peduncle has 15.3 flowers with diameter of about 7.4 cm. It has adequate peduncle height, with some curved and spreading petal and sepals. Under optical culture conditions, it started to bloom early-winter (November).
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摘要 :
A New Cymbidium variety "Yellow Evening" was developed from a cross between "Oji" and "Valley Flower Cherry Life" followed by seedling and line selections at the National Institute of Horticultural and Herbal Science (NIHHS), Rura...
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A New Cymbidium variety "Yellow Evening" was developed from a cross between "Oji" and "Valley Flower Cherry Life" followed by seedling and line selections at the National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA) in 2004. After investigation of the characteristics and selection for 9 years (1996-2004), it has been selected specifically pot orchid flower. "Yellow Evening" has medium plant height and semi-erect peduncle. It has medium flowering habit and brownish yellow flowers (RHS, Y11B: petal and sepal) with grayed purple GPl83A spot on lip, when fully opened. Each peduncle has 15.3 flowers with diameter of about 7.4 cm. It has adequate peduncle height, with some curved and spreading petal and sepals. Under optical culture conditions, it started to bloom early-winter (November).
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