• Title/Summary/Keyword: different cultivar

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Studies on the Inheritance of Resistance to Bacterial Leaf Blight of Rice Varieties (수도(水稻) 백엽고병(白葉枯病)의 저항성(抵抗性) 유전(遺傳)에 관(關)한 연구(硏究))

  • Choi, Jae-eul
    • Korean Journal of Agricultural Science
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    • v.4 no.2
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    • pp.191-198
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    • 1977
  • This study was conducted to determine the inheritance to bacterial leaf blight in rice. Varieties used in the study were IR1544-349-2, IR1698-237-2, IR1529-680-3, IR28, IR29, RP663-337-7-8-4-1-1, RP291-20, 62-595 and Kele. The isolate of bacteial leaf blight used was 71-23, 76-1 of Xanthomonas oryzae. $F_1s$ were obtained from crosses between resistant and susceptible varieties. Field observation was made from the Parents, $F_1s$ and $F_2$ sagregating population. The result is summaryzed as fallow: 1) The resistance to the bacterial leaf blight (71-23) derived from cultivars IR1529-680-3, IR28, IR29, RP663-337-7-8-4-1-1, RP291-20 and 62-595 was controlled by a single dominant gene. 2) The resistance to the bacterial leaf blight (71-23) derived from cultivars IR1545-339-2, IR1544-340, IR1698-237-2 and Kele was controlled by a single recessive gene. 3) The resistance to the bacterial leaf blight (76-1) derived from cultivars IR1545-339-2, IR1544-340, IR 1698-237-2 was controlled by a single dominant gene. 4) Degree of resistance to the bacterial leaf blight and genetic type were different depending on isolates within the same resistant cultivar. 5) There was no relation between resistance to the bacterial leaf blight and heading days.

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Influence of Abnormally Low Temperatures on Growth, Yield, and Biologically Active Compounds of Strawberry (이상 저온조건이 딸기의 생육, 수량 및 생리활성 성분에 미치는 영향)

  • Lee, Gyu-Bin;Choe, Yun-Ui;Park, Eun-Ji;Wang, Ziyu;Li, Mei;Li, Ke;Park, Young-Hoon;Choi, Young-Whan;Kang, Nam-Jun;Kang, Jum-Soon
    • Journal of Environmental Science International
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    • v.26 no.3
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    • pp.381-392
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    • 2017
  • The present study aimed to investigate the effects of low temperature on the growth, yield, quality, and biologically active compounds of strawberry and obtain basic information for developing a technology for stable growth of strawberry in greenhouses. Growth of strawberry, including leaf number, area, and length, plant height, and dry weight was better at the optimum growth temperature of $20^{\circ}C$ than at a lower temperature of $15^{\circ}C$. At the low temperature of $15^{\circ}C$, the cultivar 'Maehyang' was more tolerant and displayed better growth rate than 'Seolhyang'. At $15^{\circ}C$, the fruit production per week and fruit weight was lower than that at $20^{\circ}C$. In contrast, fruit length and diameter were not significantly different between the two growth temperatures. Growth temperature also did not affect the fruit color index, Hunter L, a, b value, or fruit firmness. However, the sugar content of strawberries grown at $15^{\circ}C$ was higher by 0.8 and 1.5 Brix for 'Seolhyang' and 'Maehyang', respectively, than of those grown at $20^{\circ}C$. There was no difference in the content of fisetin, a biologically active compound, for 'Seolhyang' at both growth temperatures, however, the fisetin content of 'Maehyang' was higher at $20^{\circ}C$ than at $15^{\circ}C$. Cinchonine and ellagic acid content of 'Seolhyang' was higher at $20^{\circ}C$ than at $15^{\circ}C$, whereas that of 'Maehyang' was higher at $15^{\circ}C$ than at $20^{\circ}C$. Quercetin content showed no significant differences with respect to growth temperature, however, it tended to increase at $20^{\circ}C$. The cinnamic acid content of 'Seolhyang' was higher at $15^{\circ}C$ than at $20^{\circ}C$, whereas that of 'Maehyang' increased at $20^{\circ}C$. Collectively, the biologically active compounds of strawberry were affected by growth temperature. Moreover, the content of these compounds tended to increase at $20^{\circ}C$, the optimum growth temperature, rather than at the sub-optimal growth temperature of $15^{\circ}C$.

Antimutagenicity of Korean Sweet Potato (Ipomoea batatas L.) Cultivars (한국산 고구마의 품종별 항돌연변이 효과)

  • Park, Jeong-Seob;Bae, Jae-O;Choi, Gyu-Hwan;Chung, Bong-Woo;Choi, Dong-Seong
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.40 no.1
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    • pp.37-46
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    • 2011
  • Polyphenolic content and antimutagenicity of the methanol extracts prepared from 22 cultivars of sweet potato with different flesh colors were investigated using Folin-Ciocalteu's phenol reagent method and Ames test, respectively. There was a remarkable cultivar difference in the polyphenolic content of sweet potato. Su, Hayanmi and Shinhwangmi among 17 cultivars of non-purple sweet potato had higher polyphenolic contents of 21.4, 21.5 and $20.3{\mu}g$ (GAE/g dried sweet potato), respectively, whereas Manami and Yeonhwangmi were very much lower at 4.6 and $4.8{\mu}g$. Mokpo No.62, Borami, Sinjami, Jami and Ayamurasaki had much higher polyphenolic contents of 67.7, 76.9, 44.9, 128.3 and $93.2{\mu}g$, respectively, than non-purple sweet potato. The methanol extract from the sweet potato effectively inhibited the reverse mutation induced by 1-NP, daunomycin, Trp-P-1, Trp-P-2 and 2-AA on S. Typhimurium TA 98, and by 1-NP on S. Typhimurium TA 100. These results suggest that the antimutagencity properties may be influenced by the tested mutagen and strain rather than the polyphenolic content of non-purple and purple sweet potato. However, in the purple sweet potatoes, a high polyphenolic content may influence the antimutagencity properties.

Effects of CuEDTA and FeEDTA Foliar Spray on Antioxidant Activities of Apple (CuEDTA와 FeEDTA의 엽면살포가 사과의 항산화 활성에 미치는 영향)

  • Park, Ji-Young;Ryu, Ho-Ung;Shin, Hyun-Suk;Lim, Heon-Kyu;Son, In-Chang;Kim, Dae-Il;Jeong, Heon-Sang;Lee, Jun-Soo
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.9
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    • pp.1305-1309
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    • 2012
  • For functional enhancement of apples, the effects of CuEDTA and FeEDTA foliar spray were investigated on the antioxidant contents and antioxidant activities in 'Hongro' fruit, which is a representative early season harvesting apple cultivar, at 30 days before harvest. The polyphenolic content of peel was significantly higher in the CuEDTA (1,228.6 mg/100 g) and FeEDTA (1,210.0 mg/100 g) spraying treatment groups compared to the control group (998.8 mg/100 g). The flavonoid content of peel showed the same trend as that of polyphenolic content. The ascorbic acid content of peel as also significantly increased in the CuEDTA and FeEDTA spraying treatment groups, but anthocyanin content was the highest in the control group (560.6 mg/100 g). The ABTS and DPPH radical scavenging activities were higher in the CuEDTA and FeEDTA spraying treatment groups than in the control group, but reducing power was not significantly different between the treatments. As a result of this study, 3% CuEDTA and FeEDTA spraying treatments at 30 days before harvest can be used to effectively enhance antioxidant contents in 'Hongro' apple.

Comparison of Fruit Maketability at Various Temperature Environment in Asian Pear 'Jinhwang' Treated with 1-Methylcyclopropene (동양 배 '진황'에 있어 1-MCP 처리에 따른 다양한 온도 환경에서의 유통력 비교)

  • Lee, Ug-Yong;Choi, Jin-Ho;Kim, Yoon-Kyung;Oh, Kwang-Suk;Kim, Sung-Ju;Chun, Jong-Pil
    • Journal of Bio-Environment Control
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    • v.26 no.1
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    • pp.19-26
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    • 2017
  • We evaluated the fruit quality and the incidence of physiological disorders in Asian pear (Pyrus pyrifolia Nakai) cultivar 'Jinhwang' treated with 1-methylcyclopropene (1-MCP, $1.0{\mu}L{\cdot}L^{-1}$) under different temperature conditions to determine appropriate shelf-life period. The postharvest application of 1-MCP in 'Jinhwang' pears showed positive effects at all storage temperature (18, 25 or $30^{\circ}C$) with regard to flesh firmness, marketable fruits (>20N) only attainted with 1-MCP treated fruit after 21 days of shelf-life. A high incidences of physiological disorders and of fruit decay rates were obvious in the fruits distributed at $30^{\circ}C$ and low incidence of physiological disorders including core browning and mealiness were attained at the fruits treated with 1-MCP when we compared with untreated control. The production of ethylene and respiration rates increase coincide with elevated distribution temperature. High respiration rates were obvious in the control fruits, it reached approximately two times higher than the that of 1-MCP treated one regardless of market temperature. These results demonstrated that the application of 1-MCP, especially at high temperature market condition, represented as an effective postharvest technique for newly developed Asian pear 'Jinhwang'.

Study on the Deacidification of Wine Made from Campbell Early (Campbell Early를 이용하여 만든 포도주의 산도 감소에 관한 연구)

  • Lee, Ju-Kyung;Kim, Jae-Sik
    • Korean Journal of Food Science and Technology
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    • v.38 no.3
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    • pp.408-413
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    • 2006
  • The domestic grape cultivar Campbell Early has high levels of both malic acid and tartaric acid. Therefore, the processing of wine made from Campbell Early must include decreasing the acidity. Six different methods were tested for reducing excess acidity: traditional vinification, precipitation, cold stabilization, malolactic fermentation (MLF), carbonic maceration and cold fermentation. Wines had higher pH values and lower total acidity than control after all the processing methods except cold stabilization. With regard to the measured organic acid content, the control contained 2,927 ppm tartaric acid, 2,421 ppm malic acid and 486 ppm lactic acid, but the precipitated wine contained 2,346 ppm tartaric acid. The MLF wine contained 828 ppm malic acid and 2,394 ppm lactic acid. Wine after carbonic maceration contained 792 ppm malic acid and cold fermentation decreased the organic acid contents in general. Sensory analysis showed that the carbonic maceration and precipitation methods resulted in wines that were excellent in color, flavor, taste and overall preference.

Effect of seaweed extracts(GA14), a plant growth regulator, on growth and yield of two rice cultivars (식물생장조절제 Seaweed extracts(GA14)의 수도 품종간 생육 및 수량에 미치는 효과)

  • Song, Jae-Young;Kim, Yong-Il;Park, Bo-Young;Jung, Jae-Young;Choi, Hyun-Gu;Jung, Jong-Tae;Lee, Hee-Bong
    • Korean Journal of Agricultural Science
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    • v.31 no.1
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    • pp.1-8
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    • 2004
  • This study was carried out to identify the effects of seaweed extracts(GA14) on growth of two rice cultivars, Junambyo and Donganbyo. Seedling qualities of two cultivars were better in all items including heading dates at early stage treated at seedling plus 2-3 leaf stages than at single treatment of seedling. Ripening ratio of Junambyo in paddy field was increased 0.3% by seaweed extracts(GA14) treatment, but that of Donganbyo decreased 0.5%. 1,000 grain weight of Junambyo and Donanbyo by seaweed extracts(GA14) treatment was two to four grams higher and the yield of two cultivars was also higher by three to four percent. Appearance characters of two rice cultivars was high in head, while damaged, chalky and crack rate were low at seaweed extracts(GA14) treatment. Protein, moisture and amylose characteristics related to table quality of Junambyo were not different by seaweed extracts treatment, but table values was high in only treatment. Donganbyo was also similar to Junambyo, but table quality was slightly high at non-treatment.

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Effect of Planting Method on the Growth and Yield of Rehmannia glutinosa Liboschitz (지황재배시 재식방법이 생육 및 수량에 미치는 영향)

  • InSikChoi
    • Korean Journal of Plant Resources
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    • v.10 no.2
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    • pp.140-144
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    • 1997
  • This experiment was carried out to investigate the proper planting method of Rehmannia glutinasa Liboschitz. A Chungbuk local cultivar was sown on the seed bed of 200cm with the planting density of 30cm(6 rows) $\times$ 8.5cm(30 rhizome per $\textrm{m}^2$). The experimental design was randomized block design with 3 replications. And the result was summarized as follows. The emergence date of level Planting(control : 0$^{\circ}$) was May 23, but the emergence dates of Oblique planting(45$^{\circ}$) and Upright planting(90$^{\circ}$) treatments were later than the control by 2~4 days. And the leaf length and the ratio of leaf length/leaf width were not significantly different. As compared with the 29.2cm and 10.0mm of the rhizome length and the rhizome diameter of level planting treatment, the rhizome length of Oblique planting treatment was decreased by 3.4cm and 0 mm. The length and diameter of rhizome of the Upright planting treatment was decreased by 2.8cm and 1.0mm. And the order of sugar content was level Planting > Oblique planting > Upright planting. The total yields were decreased by 9% in the Oblique planting and by 15% in the Upright planting compared to 1,203kg/10a in the control, and the commercial yields showed the same tendency. The level planting treatment was found to be most proper for sowing of Rehmannia glutinasa Liboschitz in the middle inland region of Korea.

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Antioxidant Activity, Total Phenolics, Vitamin C and Sugar Content during Fruit Ripening of Five Different Jujube Cultivars (대추(Zyziphus jujuba) 품종별 성숙정도에 따른 항산화 활성, 총페놀 함량, 비타민 C 함량 및 당함량)

  • Park, Youngki;Kim, Jae-Hee
    • Korean Journal of Plant Resources
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    • v.29 no.5
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    • pp.539-546
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    • 2016
  • The aim of this study was to analyze antioxidant activity, total phenolics, and vitamin C content in unripe and ripe jujube cultivar and to investigate correlation between antioxidant and chemical constituents including total phenolics and vitamin C. The antioxidant activity was measured by the DPPH radical scavenging activity, ABTS radical scavenging activity, and reducing power. Although, the weight, diameter and soluble solids of Zyziphus jujuba fruit were increased with the progress of ripening, antioxidant activity and total phenolics were decrease during ripening. The highest free-radical scavenging activity (at 2.5 ㎎/㎖) and reducing power (at 1 ㎎/㎖) in fruit were 81.75% (Bokjo, unripe) and 0.80 (Mudeung, unripe), respectively. The highest total phenolic content in unripe fruit of Mudeung was 62.50 ㎍/g. A linear correlation (r=0.911) was shown between DPPH radical scavenging activity and total phenolic content.

Possibility of Y-shaped Cultivation of New Interspecific Hybrid Plumcot (Prunus salicina × Prunus armeniaca cv. Harmony) for Plant Resources Utilization (식물자원 활용 증진을 위한 새로운 종간교잡 플럼코트 '하모니'의 Y자 수형 재배 가능성 검토)

  • Kim, Su Jin;Yoon, Ik Koo;Nam, Eun Young;Gwon, Jung Hyun;Kim, Sung Jong;Chung, Kyeong Ho;Jun, Ji Hye;Yun, Seok Kyu
    • Korean Journal of Plant Resources
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    • v.30 no.5
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    • pp.565-570
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    • 2017
  • In a plumcot 'Harmony' cultivar, which is an interspecific hybrid between plum and apricot, canopy occupation and productivity according to tree training system, Y shape with no trellis (YNT) and Y-palmette with trellis (YPT), were compared. According to the survey results for 5 years of planting, tree growth was similar in two training systems. However, canopy occupation and fruit yield of YPT were significantly higher than those of YNT. The fruit weight and sugar content were not significantly different between two systems. The fruit drop rate tended to be lower in YPT than in YNT. From the above results, it is expected that the YPT type will contribute to the increase of canopy occupation and fruit yield and reducing the fruit drop rate compared to the YNT.