• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.32 no.1
• /
• pp.5-9
• /
• 1987

In order to investigate the occurrence status of tiller at the upper node of rice, this trial was conducted with different eco-typed and 23 cultivars in 1983 and testified the effect of fertilizer levels with Indica x Japonica cultivars in 1984. In occurring of tiller at the upper nodes, upper 2nd, 3rd node and lower 2nd, 3rd node rose simultaneously. The tillering rates of the upper nodes of Japonica x Indica cultivars were more than Japonica cultivars and early maturing cultivars were more than medium or late maturing cultivars, respectively. Highly negative correlations were found between the tillering rate of upper nodes and days from transplant-ing to heading and bending angle degree of 2nd node. The tilleriiig rate of the upper nodes treated with different levels of fertilizer increased with non-fertilizer than those of standard (N-P-K =15-11-13kg/10a) or heavy (N-P-K =25-15-18kg/10a) levels.

• Korean Journal of Breeding Science
• /
• v.50 no.4
• /
• pp.406-414
• /
• 2018

This study was conducted to develop environmental risk assessments and biosafety guides for insect-resistant genetically modified rice in an LMO (Living Modified Organism) isolation field. In the LMO quarantine area of Kyungpook National University, the species diversities and population densities of non-target insects found on insect-resistant genetically modified rice (Bt-T), rice resistant to Cnaphalocrocis medinalis, and non-GM rice (Dongjin-byeo and Ilmi-byeo) were investigated. The Bt-T plants were, therefore, evaluated under field conditions to detect possible impacts on above ground insects and spiders. In 2016 and 2017, the study compared transgenic rice and two non-GM reference rice, namely Dongjin-byeo and Ilmi-byeo, at Gunwi. A total of 9,552 individuals from 51 families and 11 orders were collected from the LMO isolation field. From the three types of rice fields, a total of 3,042; 3,212; and 3,297 individuals from the Bt-T, Dongjin-byeo, and Ilmi-byeo were collected, respectively. There was no difference between the population densities of the non-target insect pests, natural enemies, and other insects on the Bt-T compared to non-GM rice. The data on insect species population densities were subjected to principal component analysis (PCA) without distinguishing between the three varieties, namely GM, non-GM, and reference cultivar, in all cultivation years. However, the PCA clearly separated the samples based on the cultivation years. These results suggest that insect species diversities and population densities during plant cultivation are determined by environmental factors (growing condition and seasons) rather than by genetic factors.

• Korean Journal of Plant Taxonomy
• /
• v.44 no.3
• /
• pp.181-187
• /
• 2014

The taxonomic status of a new forma, Opuntia humifusa (Raf.) Raf. f. jeollaensis E. J. Kim & S. S. Whang, and the taxonomic relationships of three Korean cladodes were studied based on DNA sequences of three genes. The new forma O. humifusa f. jeollaensis (Wanggasi-Chunnyuncho) is simlilar to O. humifusa (Chunnyuncho), but differ in having both flower with the reddish inner center, and strong and many 3 cm long spines. Molecular studies showed that the new forma grouped into Macrocentra series instead of Humifusa series which included Korean O. humifusa. We designated the new taxa firstly studied here as a new forma, because the taxa have been mainly cultivated in farmlands in Jeolla-do area rather than distributed in nature. The taxonomic relationships of three Korean cladodes are discussed in detail.

• Research in Plant Disease
• /
• v.23 no.3
• /
• pp.249-255
• /
• 2017

The rice blast fungus is a representative model phytopathogenic fungus in which Gene-for-Gene interaction with host rice is applicable. After 1980, eight differential varieties have been constructed and classified to analyze the race of rice blast isolates in Korea. However, since there is limited information about the genetic background of rice blast resistance genes within the Korean differentials, scientific analysis on the emergence of new race or resistance break down was difficult. Recently, a differential system has been developed using monogenic resistance lines to understand the interactions of pathogen race and rice resistance genes. In this study, a total of 50 isolates were selected from four different races isolated in Korea, and they were inoculated into monogenic lines. As a result, the isolates in the same race classified by the Korean differential system reacted differently in single monogenic lines. This suggests that the isolates categorized as the same race group contains different avirulence genes and furthermore, it is presumed that the Korean differential system is difficult to provide useful information for breeding program. For this reason, introduction of differential system using monogenic resistance lines is required in addition to the current system.

• Journal of the Korean Institute of Traditional Landscape Architecture
• /
• v.40 no.2
• /
• pp.44-58
• /
• 2022

Bunhwangsa Temple, Baekryulsa Temple and Sambulsa Temple are not famous cultural heritage area, but they are visited by many tourists and are located in Gyeongju National Park and Gyeongju Historic Areas, so environmental and cultural preservations are required. The purpose of this study is to manage the unique environment and landscape of cultural assets by analysing the invasive alien plant of traditional temple of Gyeongju. The whole flora were summarized as 188 taxa including 73 families, 136 genera, 154 species, 3 subspecies, 11 varieties, 4 forms, 5 hybrids and 12 cultivars., and the landscape plants were 163 taxa and 38 taxa of the invasive alien plants. The 13 taxa of invasive alien plants were planted in three temples. The ecosystem disturbance species were 3 taxa including Rumex acetosella, Lactuca seriola and Symphyotrichum pilosum. Invasive alien plants have artificial causes such as landscape planting, but there are also those that are introduced naturally from outside. The parking lot of the temple is expected to be a major propagation path for invasive alien plants due to the large amount of interference and disturbance. Based on the results of this study, the management plans are suggested as follows. First, it is necessary to use native species suitable for the natural environment and traditional landscape of Korea for landscape planting of traditional temples, and development of planting guidelines centered on cultural properties is required. Second, it is necessary to refrain from planting invasive alien plants because traditional temples are located in an important environment and historically. Third, for the preservation of the temple environment, it is necessary to promptly remove the ecosystem disturbance species. Fourth, in order to express the landscape characteristics of traditional temples, a unique planting plan should be established in consideration of the location environment and historicity.

• Korean Journal Plant Pathology
• /
• v.12 no.1
• /
• pp.33-40
• /
• 1996

우리나라 여러 딸기 재배지에서 전형적인 시들음 증상을 나타내는 이병식물에서 분리한 32개의 Fusarium oxysporum 균주들을 vegetative compatibility와 전기영동에 의한 동위효소상의 차이에 의해 분류하고 이들과 병원성과의 관계를 알아보았다. Nitrate nonutilizing(nit) mutant를 이용하여 vegetative compatibility group으로 분류해 본 결과 크게 A, B, C, D의 4개 그룹으로 나눌 수 있었으며 A그룹에는 15개 균주, B그룹에는 7개 균주, C와 D그룹에는 각각 2개 균주, 그리고 single VCG인 6개 균주가 존재하였다. 전기영동에 의한 esterase, catalase, acid phosphatase, leucin-aminopeptidase(LAP)의 동위효소상을 비교하여 본 결과 I, II, III, IV의 4개 그룹으로 나눌 수 있었으 I 그룹에는 18개 균주, II그룹에는 2개 균주, III그룹에는 6개 균주, IV그룹에는 6개 균주로 분류할 수 있었다. 또한, VCG의 A와 D그룹에 속하는 모든 균주들의 동위효소상의 I 그룹에 속하였으며 VCG B그룹의 7개 균주들 중에서 5개 균주가 동위효소상의 IV그룹, 7개 균주들 중에서 5개 균주가 동위효소상의 IV그룹, 나머지 2개 균주는 I 그룹과 III 그룹에 속하였으며 C그룹의 균주는 III과 IV 그룹에 속하였고, single VCGs들은 III 그룹에 4개 균주, II 그룹에 2개 균주가 속하므로 VCG와 동위효소상 간에는 밀접한 관계가 있음을 알 수 있었다. 4개 딸기 품종에 대해 병원성을 비교하여 본 결과 VCG A에서 선발된 2개 균주들은 보교조생에 대해 가장 병원성이 강하였으며 정보나 여홍에 대해서도 강한 병원성을 가지고 있었다. 반면에 B 그룹에서 선발된 2개 균주들은 4개 품종에 대해 병원성이 약하거나 거의 없었으며 C 그룹에서 선발된 1개 균주는 여홍에 대해 상대적으로 가장 강한 병원성을 가지고 있었다.

• Current Research on Agriculture and Life Sciences
• /
• v.14
• /
• pp.15-28
• /
• 1996

The effective components of the peony cultivar, Euseongjagyag and Youngcheonjagyag, which were the major cultivars of peony in Kyeongbuk area, were determined with HPLC and TLC. The paeoniflorin content in the root of Euseongjagyag were more than that of Youngcheonjagyag. The root of Euseongjagyag contained much albiflorin and Youngcheonjagyag contained much oxypaeoniflorin in comparision with albiflorin and oxypaeoniflorin contents in both cultivars of peony. Paeoniflorin contents in accordance with peony prodution regions were ranged from 2.15% to 4.08%, and paeoniflorin content of local cultivar of Euseong and that of Geochang were approximatly the same but that of Youngcheon was the lowest. Paeoniflorin content in the 18 accessions of peony cultivar which were collected from Kyeongbuk area and harvested on November 1993, were ranged from 1.41% to 5.30%. The 18 accessions of peony were classified with the HPLC chromatogram pattern of peony root extract into the three groups which composed with Euseong peony group(9 accessions), Youngcheon peony group (4 accessions) and Punggi standard peony group(5 accessions). High content of paeoniflorin WaS contained in peony root harvested in May and November. but low content of paeoniflorin was contained in peony root harvested in March and September.

• Korean Journal of Organic Agriculture
• /
• v.13 no.1
• /
• pp.101-112
• /
• 2005

In order to select the suitable soybean cultivars for paddly field cultivation, growth response and yields characters were investigated with 37 Korean domestic soybean cultivars, in Yeoncheon, Gyeonggi province. The results can be summarized as follows ; When the soybeans were cultivated in paddy field, significant differences were observed in growth responses at each growth stage and yields among the cultivars. Yields of six cultivars, such as Danbaekkong, Paldokong, Pungsannanulkong, Myeongjunamulkong, Saeolkong, and Namhaekong, were less than 200kg/10a, however, seven cultivars, such as Shinpaldalkong 2, Sohokong, Dormikong, keumkangkong, Bukangkong, Dajangkong, and Geomjeongkong 2, showed highest yields ranged from 301~385kg/10a. At V5 stage, highly positive correlation(r=091$^{{\ast}{\ast}}$) was observed between the top dry weight and leaf area while negative correlation was existed between T/R ratio and root dry weight. However, at R2 age, leaf area was correlated with both top and root dry weight while T/R ratio was correlated with leaf area and top dry weight. Thirty-seven soybean cultivars used in this experiments were classified into 3 different clusters based on 19 important agronomic characters, and genotypic properties of the cultivars were similar in each cluster. In results, high yields could be achieved by selected cultivation of suitable soybean cultivars such as Shinpaldalkong 2 which showed early maturation date and highly ripening ratio.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.36 no.3
• /
• pp.241-248
• /
• 1991

A few Korean native rice cultivars, 'Sharei' and red rice which are regarded as weedy rice and a rice sample enshrined in the Buddha's Image were examined for the grain shape, seed coat color, amylose content, alkali digestibility and esterase response pattern. Among the Korean native varieties which are collected during 1920's and preserved up to now, there are some varieties belong to the typical Indicas. Some lines of 'Sharei' and some collections of red rice from farmer's field showed the evidence of Indica rice. A rice sample which was enshrined in the Buddha's image in 1302 looked like a mixtures of Indica and Japonica. Reviewing the articles from the old books describing characteristics and some reports on the Indica rice in Korea, it was deduced that the Indica rice was grown in Korea in some extent before 1300.

• Horticultural Science & Technology
• /
• v.33 no.4
• /
• pp.470-478
• /
• 2015

This study was investigated the anthocyanin composition of 'Gaeryangmeoru', 'Kyoho', and 'Hongisul' grapes cultivated in Korea using ultra-performance liquid chromatography (UPLC) coupled to a mass spectrometer (MS) equipped with an ESI (electrospray ionization) source. 'Gaeryangmeoru' is a dark-blue grape used for winemaking that can reach its coloring in unfavorable weather. The 'Kyoho' and 'Hongisul' varieties are hybrid grapes that feature black and pink skin, respectively. The anthocyanins extracted from the peels of grapes were analyzed using UPLC-ESI-MS/MS. Twenty-five anthocyanins were identified in the 'Gaeryangmeoru' and 'Kyoho' varieties, and 21 were identified in the 'Hongisul' variety. Eight, 14 and five predominant anthocyanins were identified in 'Gaeryangmeoru', 'Kyoho' and 'Hongisul' grape respectively. In all three varieties, mono-glucosides were 2.3-5.9 times more abundant than di-glucoside. Malvidin was the predominant anthocyanidin in 'Gaeryangmeoru' (44.1%) and 'Kyoho' (56.5%), but cyanidin (96.8%) was in 'Hongisul'. The acylated anthocyanins in 'Gaeryangmeoru' (2.0%) were rare, whereas acylated anthocyanins with p-coumaric acid were predominant in 'Kyoho' (40.9%) and 'Hongisul' (70.7%). In particular, cyanidin feruloyl glucoside was found only in the 'Hongisul' cultivar and considered to be useful as a criterion for identification of the variety. As a result, the grape varieties were demonstrated to have variety-specific anthocyanin characteristics, enabling classification based on anthocyanin composition in terms of anthocyanidins, glucosylation and acylation. The taxonomical application of anthocyanin composition confirmed the possibility that 'Gaeryangmeoru' originated from Vitis amurensis or its hybrids, and the 'Hongisul' grape was distinguished from other grapes by cyanidin feruloyl glucoside.