본 연구는 관상적 가치가 뛰어난 한반도 자생식물 너도개미 자리[Minuartia laricina (L.) Mattf.]의 산업화를 위한 대량 번 식 기술을 개발하기 위해 수행되었다. 종자 번식 실험에서는 2023년 8월 16일 형태적으로 완전히 성숙한 종자를 채종하여 사용하였으며, 종자의 내부 형태를 관찰한 결과 배가 완전히 발달하여 미숙배로 인한 형태적 휴면(MD)은 없음을 확인하였 다. 또한, 종자를 증류수에 침지시켜 수분 흡수율을 조사한 결과 수분흡수 24시간 후 약 66%의 수분 흡수율을 보여 불투수성 종피에 의한 물리적 휴면(PY)도 없음을 확인하였다. 실온 (22±2℃)에서 후숙처리(Dry after-ripening)를 0, 4, 21주 실 시 후 각각 4, 10, 15, 20, 25, 30℃로 설정된 기내 발아 실험을 진행하였다. 실험의 결과, 후숙 4주 처리 후 20℃에 치상한 종자 의 발아율이 약 76%로 가장 높았다. 후숙 처리를 하지 않은 종자는 12주 내 어떠한 온도 조건에서도 발아하지 않아 생리 적 휴면(PD)으로 판단되었다. 삽목 번식 실험에서는 줄기삽목 (Stem-cutting) 방식으로 진행하였고, 루톤 분제 처리가 발근 에 미치는 영향을 조사하였다. 루톤 분제를 처리하지 않은 처리 구는 발근율과 생존율이 100%로 나타났으며, 루톤 분제가 처리 된 삽수는 이들보다 발근율과 생존율이 통계적으로 유의하게 낮았다. 따라서 너도개미자리 종자는 생리적 휴면 종자로 분류 되며, 4주간의 후숙 처리가 휴면 타파에 효과적인 것으로 확인 되었다. 또한, 너도개미자리 삽목 번식 시 별도의 발근 촉진제 처리가 필요하지 않음을 확인하였다.

Islands often have relatively well-preserved ecosystem and an abundance of bioresources with a high conservation value, with unrecorded species continuing to be reported (Hong, 2011). Approximately 1,000,000 species of insect known worldwide (Costello et al., 2012), and 20,710 species are known in Korea (NIBR, 2023). Among these, there are 6,117 species in Korean islands (HNIBR, 2022). Native insect Bio-scan project for Korean islands is to estimate the number of insect species on Korean islands. We attempted to estimate the number of insect species on Korean islands using Barcode Index Number (BIN), and also found unrecorded species. The samples were collected four times from April to July at five locations in the Amtedo, an island located in Shinan-gun Jeollanam-do. We tried to obtain a minimum of one to usually a maximum of four samples per morphospecies to enable DNA barcoding.

본 연구는 유색과 백색품종 토종오리의 성별에 따른 생산능력과 도체특성을 평가하고자 실시하였다. 1일령 토종오리 총 480수를 2개 품종(유색과 백색)×2개 성별(암컷과 수컷)로 총 4처리구의 4반복으로 반복 당 30수씩 평사에 나누어 8주간 사양실험을 진행하였다. 본 연구결과, 전체 사양실험기 간에서 토종오리의 체중, 증체량 및 사료섭취량은 품종(유색과 백색) 간 차이는 없었으나 수컷이 암컷보다 유의적으로 높았다(p<0.05). 이와 유사하게, 사료요구율은 유색품종과 백색품종의 차이가 없었으나 수컷이 암컷에 비해 유의적으로 개선됨을 확인하였다(p<0.05). 토종오리의 머리, 가슴육, 다리육 및 간의 무게는 처리구간 통계적 차이를 나타내지 않았다. 도체중량은 처리구간 차이가 없었으나, 도체율은 백색품종이 유색품종과 비교해 현저히 높았다(p<0.05). 또한 복강지방 무게는 수컷이 암컷에 비해 높았으며(p<0.05) 백색품종이 유색품종보다 높았다(p<0.05). 폐사율은 토종오리 의 품종과 성별에 따른 유의적 차이가 없었다. 본 연구결과는 토종오리의 육성기 단계에서 사육성적에 대한 기초자료로 이용될 것으로 사료된다.

최근 정원에 대한 관심이 증가함에 따라 자생 식물을 활용 하기 위한 연구가 진행되고 있다. 참식나무(Neolitsea sericea (Blume) Koidz).는 관상용뿐만 아니라 목재로도 이용할 수 있 다. 따라서 이 연구는 참식나무를 정원 식물 소재로 활용하기 위한 대량 증식 기술 개발을 위하여 종자의 발아 특성과 저장 특성에 대해 알아보고자 진행하였다. 2022년 11월 2일 제주 지역에서 채집한 종자를 실험에 사용하였다. 종자의 내·외부 형태 관찰을 한 결과, 종자가 탈리되는 시점에 배가 완전히 발 달한 형태를 가지고 있기 때문에 형태적휴면(morphological dormancy, MD)이 없음을 확인할 수 있었다. 수분흡수 실험 을 통하여 참식나무 종자는 72시간 이후 40% 정도의 수분흡수 율을 보여 내과피의 불투성에 의한 물리적휴면(PY, physical dormancy)이 없는 것으로 판단하였다. 채종 후 곧바로 무가 온 온실에 파종하면 이듬해 5월에 약 60%가 발아하였다. 저 온습윤처리 0, 2, 4, 8, 12주 후 25/15°C에 배양한 결과 최 종 발아율은 각각 0%, 0%, 21.1%, 32.6%, 34.7%였다. GA3 를 0, 10, 100, 1000mg·L-1 농도로 처리한 후 25/15°C에서 배양한 결과, 최종 발아율은 각각 0, 14.5, 22.7, 42.2%였다. 따라서 본 실험의 결과 8주 이상의 저온 처리 또는 GA3 처리 를 통하여 어느 정도 휴면을 타파시킬 수 있었다. 이러한 결과 를 통하여 종자는 intermediate PD를 가지는 것으로 판단 된다. 일부 발아하지 않은 종자는 deep PD를 가지고 있는 것 으로 판단하였다. 후숙 처리 실험의 결과 4주 만에 수분 함량 이 2% 이하로 감소하였고 종자는 전혀 발아하지 않았다. 따라 서 종자의 저장 특성 중 recalcittrant 특성을 지닌 난저장성 종자로 보인다.

This study was conducted to develop a seed propagation protocol of Hemerocallis taxa native to the Korean Peninsula. In this study, the seed dormancy types were classified. The germination traits of H. thunbergii, H. dumortieri, H. hakuunensis, and H. hongdoensis were also characterized. The initial embryo to seed length ratio (E:S ratio) in seeds of the four Hemerocallis species was between 0.80 and 0.90 at harvest, however, the E:S ratio did not increase until just before germination. Thus, seeds of the four Hemerocallis species had no morphological dormancy (MD), and at least 84% of seeds of all tested species germinated at 25/15℃ under light within 30 days. The lower the incubation temperature, the lower the germination rate of seeds of the four Hemerocallis species. However, the temperature range for germination was expanded due to old stratification. Gibberellin treatment increased the germination rate or germination speed at a relatively low temperature of 15/6℃. However, this treatment did not improve the germination rate as much as the temperature at 25/15℃. Under 15/5℃ of incubation, cold stratification increased the final germination percentage and rate/speed and expanded the temperature range for germination from high to low (25/15℃ → 15/6℃). This indicates that the seeds have a conditional dormancy (CD) that germinates in a narrow temperature range. In conclusions, the four Hemerocallis seeds exhibited nondeep physiological dormancy.

This study was to evaluate the values of Korean native sweet sorghum as a new feed crop for ruminants. Sweet sorghum was the Muan native species (Bioenergy Crop Research Center, National Institute of Crop Science), and cultivated from May to October 2021 at Sangji University (Wonju-si, Gangwon-do, Korea). There were a non-treated group (Con), a recommended amount treatment (RD) and a treatment with double the recommended amount (Double RD) by an oil cake fertilizer. Plant height was measured at weekly intervals for 12 weeks after planting sweet sorghum seedlings, and was a significant difference in the order of Double RD, followed by RD and Con in 7 weeks (p<0.05). Feed values and sugar contents were measured in 7, 9, and 11 weeks. Crude protein of Double RD was higher than that of the other treatments in 7 and 9 weeks (p<0.05). Crude fat was higher at Double RD than the other one in 9 weeks (p<0.05). ADF and NDF of Double RD were higher than the other one (p<0.05). When it was compared to corn and sudangrass hybrids grown on farms, Crude protein was lower in sweet sorghum than other crops (p<0.05), and crude fat was higher in sweet sorghum than corn (p<0.05). Crude fiber, ADF and NDF were higher in sweet sorghum compared to corn and sudangrass (p<0.05). The sugar contents of sweet sorghum were 4.07 ± 0.12∼7.63 ± 0.21 brix, and showed higher than corn and sudangrass hybrid (p<0.05). The rumen in situ digestibility of sweet sorghum was 30.73∼38.13% at the 9th and 11th weeks, and showed higher than that of corn and sudangrass hybrids (p<0.05). Therefore, it is considered that Korean native sweet sorghum has sufficient value as a new forage crop for ruminants, and good value as yield, nutrients and digestibility, when the grass height is 273.33~332.50 cm.

본 연구는 실내-외 우리가 있는 개방형 흑염소사에서 우리나라 5개월령 재래 흑염소를 대상으로 서열과 일주기 리듬이 하루 24시간 동안의 행동에 미치는 영향과 서열과 사료급여시간이 사료급여 후 30분 및 60분 동안의 행동에 미치는 영향을 조사하기 위해 수행하였다. 재래 흑염소의 행동은 CCTV를 사용해 녹화한 후 이들을 1분 단위로 측정하였고, 총 10개의 행동으로 분류하였다. 서열은 적대행동에 유의하게 영향을 미쳤으나 (p<0.05), 다른 행동에는 영향을 미치지 않았다. 일주기 리듬은 응립(p<0.05), 이동(p<0.01), 사료섭취(p<0.001), 적대행동(p<0.001), 비적대행동 (p<0.001), 사료탐색(p<0.05), 음수(p<0.001) 및 기타 행동(p<0.001)에 유의하게 영향을 미치는 반면 휴식(p>0.05)과 몸단장(p>0.05)에는 영향을 미치지 않았다. 서열과 일주기 리듬의 상호작용효과는 적대행동에만 유의하게 영향을 미쳤다(p<0.05). 서열은 사료급여 후 30분 동안 응립(p<0.05)과 사료섭취(p<0.05)에 유의하게 영향을 미쳤지만 다른 행동에는 영향을 미치지 않았다. 사료급여시간은 사료급여 후 60분 동안의 음수(p<0.05)에 유의하게 영향을 미쳤으나, 다른 행동에는 영향을 미치지 않았다. 서열과 사료급여시간의 상호작용효과는 모든 행동에 유의하게 영향을 미치지 않았다(p<0.05). 결론적으로, 서열, 일주기 리듬, 그리고 사료급여시간은 우리나라 5개월령 미성성숙한 재래 흑염소의 행동에 영향을 미치는 것으로 나타났다.

Cho, Eun & Oh, Sun-Young. (2023). “Representation of Native English Teachers and Korean English Teachers in Korean English Newspapers: A Corpus-based Critical Discourse Analysis”. The Sociolinguistic Journal of Korea, 31(2). 95-123. Native-speakerism, a pervasive issue in the field of English Language Teaching, is observed globally and prevalent in Korea. This ideology negatively affects both Native English Teachers (NETs) and Non-native English teachers like Korean English Teachers (KETs) for some reasons. This study utilizes corpus-based critical discourse analysis to examine the linguistic patterns and referential expressions used in Korean English newspapers to represent NETs and KETs. The analysis reveals significant disparities in their positions and authority within Korean English classrooms. Specifically, NETs are labeled as “assistants,” implying a subordinate role with limited authority, while KETs are referred to as “co-teachers,” signifying a more secure status. Moreover, the study highlights the challenges faced by KETs in demonstrating their English proficiency and sheds light on the discrimination faced by NETs who possess commodified linguistic capital and are of Caucasian descent. These findings emphasize the importance of raising awareness of native-speakerism in Korean newspapers.

본 연구는 산란후기에서 토종닭 산란계(KNH)와 하이라인 브란운 산란계(HBH)의 계란 품질을 비교하기 위해 수행되었다. 각 50마리의 KNH (Korean Rhode C, Korean Leghorn F, KNC Yellowish-brown 및 Korean Rhode D의 4원 교배종)와 HBH를 60~64주령까지 실험 케이지에 분배하였다. 실험 종료 시점에 각 그룹에서 30개의 계란을 분석하였다. 본 연구 결과, 난중은 KNH그룹에서 HBH그룹보다 통계적으로 낮았다(P < 0.05). 난각과 난백 중량은 KNH그룹이 HBH그룹보다 낮았으나(P < 0.05), 난황 중량은 KNH그룹에서 HBH그룹보다 높게 나타났다(P < 0.05). 난각의 강도와 두께는 KNH그룹에서 HBH그룹보다 낮았다(P < 0.05). 난형지수는 KNH그룹이 HBH그룹보다 높았다(P<0.05). 난황 지수와 색에서는 그룹 간 통계적 차이가 없었다. 종합적으로, 산란후기 KNH의 계란은 HBH의 계란에 비해 낮은 품질을 보였다. 국내 토종닭의 한정된 계통 숫자로 교배조합 측면에서 한계가 있기 때문에 교배종의 유전능력을 최대로 발현하기 위한 사양관리 차원(육종선발, 영양 등)의 추가적인 연구가 필요하다.

본 연구는 으아리속 6종 종자의 휴면유형을 분류하고 발아 를 위한 조건을 확립하기 위해 수행되었다. 개버무리, 병조희 풀, 자주조희풀, 사위질빵, 대구으아리, 참으아리의 배의 길이 를 측정하였으며 상대적 고온(25/15℃)과 저온(5℃)에서의 발 아양상을 조사하였다. 그리고 명조건과 암조건에서도 발아율 도 조사하였다. 으아리속 6종의 종자는 모두 미숙배를 가지고 있었으며 발아 시기에 배가 133~700% 정도 신장하는 형태적 휴면을 가지고 있었다. 개버무리, 병조희풀, 자주조희풀, 사위 질빵은 광 조건과 관계없이 25/15℃에서 30일 이내에 발아가 이루어져 생리적휴면은 없는 형태적휴면 유형임을 알 수 있었 다. 25/15℃ 고온처리에서 명조건에서 개버무리, 병조희풀, 자주조희풀, 사위질빵의 최종발아율이 각각 88.3, 83.3, 85.0, 75.0%로 높게 나타났다. 하지만 대구으아리와 참으아 리 종자는 30일 이내에 발아가 거의 이루어지지 않았으며 25/15℃에서 100일 이상 배양을 해야 발아가 이루어지는 형 태생리적휴면(MPD)을 가지고 있었다. 25/15℃에서 140일이 경과했을 때 대구으아리와 참으아리의 최종 발아율이 각각 91.7, 80%이었다. 하지만 5℃에서는 대구으아리와 참으아리 종자에서 발아가 전혀 이루어지지 않은 것으로 보아 대구으아 리와 참으아리 종자는 배의 신장과 발아에 상대적 고온을 필요 로 하는 non-deep simple morphophysiological dormancy 를 가지고 있다고 판단된다.

In this paper analyzed the features of how native Korean speakers (K) and native Vietnamese Korean learners (VKL) organize the Apology conversation, focusing on the functional phase. Based on the discourse analysis, a role play was conducted to collect data. In order to investigate the influence of social variables (social status, intimacy), learners' mother tongues and learners' Korean proficiency, different social variables were given in role-play situations, and learners' Korean proficiency was limited to intermediate and advanced levels. The results of analyzing conversations focusing on ‘Error Checking–Apology-Apology Acceptance’, which is the intermediate phase of Apology conversation, are as follows. First, in the Error Checking Phase, K tended to make indirect or preliminary remarks. In contrast, VKL immediately presented communication purposes, and advanced VKL tended to use indirect speech and additional statement. Second, in the Apology phase, the higher social status the other party has and the lower intimacy the two speakers has, the more passive K were. Interestingly, VKL showed the same pattern. For intermediate-level VKL, it was observed that the dialogue sequences were not completed. Third, in the Apology Acceptance phase, K repeatedly expressed apologies through complex dialogue sequences. However, VKL performed a concise conversation by simple dialogue sequences, and the intermediate-level VKL expressed ‘relief’ and ‘gratitude’.

Este estudio aborda el aprendizaje de la pronunciación en español como una tercera lengua por parte de los hablantes nativos de coreano en los EEUU. Específicamente, profundiza en las características de sus pronunciaciones, las perspectivas desde las que se pueden entender las pronunciaciones y los puntos que los investigadores de L3 deben tener en cuenta para examinar sus pronunciaciones. Para ello, primero este estudio presenta modelos sobre la percepción y producción de L2, así como modelos sobre la morfosintaxis de L3. Luego, aplica los principios principales de los modelos a las situaciones y características del aprendizaje que muestran los estudiantes coreanos de español en los EEUU. Por último, con base en los fundamentos teóricos y sus características del aprendizaje, hace sugerencias para estudios empíricos que examinen la pronunciación de español como L3. Este estudio puede ser útil para los estudiantes coreanos de español como L3 y sus padres, profesores de español e investigadores de L3. Además, algunas sugerencias de este estudio se pueden aplicar a los estudiantes coreanos de español como L3 que viven en Corea y países angloparlantes que no sean los EEUU.

This study was aimed at finding pedagogical answers to the question of ‘what are the qualities of native English speakers at a Korean middle school’. In this study, research results were derived using phenomenological methods from seven native English teachers at a middle school. The results of the study are as follows; 1) native English teachers should teach English effectively, 2) native English teachers should be able to adapt to their positions in Korea, 3) native teachers are ‘new information providers’ and ‘introducers of new cultures’. Korean society has focused on the external conditions and specifications of native speakers. However, it is now necessary to clearly define the qualities that native teachers should have and use them for recruitment and education of native teachers. Also, native teachers who want to work in Korea need to be trained according to the cultural and educational situation in Korea. Through this study,it is critical to consider measures to improve the legal status of native English teachers.

This study showcases an International Learning Exchange (ILE) program between North Korean (NK) refugee students in South Korea and American university students from the US. ILE programs connect two or more linguistic/ cultural groups for intercultural awareness, which provide authentic communicative environments. However, the prevalent use of English and research focus mostly on non-native English-speaking students reflect the ideology of native-speakerism embedded in ILE programs. The purpose of this study was to develop an ILE program that resists native-speakerism and to investigate its influences on native as well as non-native English-speaking students. Adopting a case-study approach, data were collected from video-taping, fieldnotes, student documents, surveys, and interviews. Findings show how the authors designed and implemented a principle-based ILE program. The responses of NK students show their growing motivation and communication ability. The responses of American students show their critical reflections on their native-speaker identities. This study offers insights into designing ILE programs based on multilingualism and translanguaging.

Veronica L., the largest genus in the family Plantaginaceae, is widespread in various habitats. Due to their long-blooming flowers, Veronica species have high horticultural value as indoor potted, garden, and landscape plants. Furthermore, Veronica plants are extremely important owing to their notable diversity in habitat usage, ploidy level, and evolution. Several native taxa, which are of key interest in breeding programs and phylogenetic studies, have been identified in Korea. The genome sizes and chromosomal characteristics are basic cytogenetic features of all taxa, and their knowledge is a prerequisite when commencing genome sequencing projects. It can provide essential information for cytogenetic, taxonomic, phylogenetic, and evolutionary studies. Thus, cytogenetic analysis and genome size estimation of seven Veronica taxa native to Korea were conducted in this study. Fluorescence in situ hybridization (FISH) karyotype analysis and chromosome counting was conducted using metaphase chromosomes probed with 5S and 45S rDNA. Nuclear DNA content and genome size were determined using flow cytometry. FISH karyotype analysis revealed a common number of 5S loci and varying 45S signals that create distinctive rDNA distribution patterns in each taxon. The results indicated that the seven investigated Veronica taxa have calculated genome sizes (1C values) ranging from 517.1 to 862.0 Mbp. This study is the first to report the chromosome number and karyomorphology of seven Veronica taxa native to Korea, as well as the use of rDNA markers for identifying individual chromosomes. These findings contribute to the crucial understanding the genomic characteristics of species within the genus Veronica, serve as a basis for studying Veronica phylogeny and evolution, and provide valuable information for future breeding programs.

This study was carried out the estimation on consumption patterns and consciousness of domestic forage for improvement of the quality of domestic forage. Although the cultivated area in South Korea of forage has increased significantly compared to the past, the self-sufficiency rate of domestic forage has increased to around 80% since 2010. Also, livestock farmers prefer to use import forage than domestic due to convenience of use. In Korean beef farms, the ratio of import to domestic forage was higher in domestic forage (import forage 3 : domestic forage 7). In the method of securing domestic forage, purchase of forage (55.6%) was higher than self-cultivation of forage (44.4%). The ratio of use by bailing type was shown in the order of rice staw rice straw (50.5%), domestic hay (15%), imported hay (12.5%), and total mixed ratio (10.7%). The preference of forage was in the order of amount of foreign matter, moisture content, price, feed value in Korean native cattle farm. The result of satisfaction with domestic and import forage showed that the satisfaction of domestic forage price was higher than import forage, while the moisture content and foreign matter of forage were lower than import forage. In addition, in the results of the satisfaction and importance of domestic roughage compared to imported roughage, satisfaction with imported roughage was generally high in all items except for price. As a result, in order to improve the satisfaction of domestic forage in Korean native cattle farm, it is necessary to minimize foreign matter in forage and increase hay production for moisture content uniform in forage.

The vomeronasal organ (VNO) is critical for reproduction and social behavior in ruminants, including cattle. The present study examined the structure of the VNO and its epithelial cells in neonatal and adult Korean native cattle (Hanwoo), Bos taurus coreanae , using immunohistochemistry and lectin histochemistry. Histologically, the VNO comprised two types of epithelia: medial vomeronasal sensory (VSE) and lateral vomeronasal non-sensory epithelia (VNSE). Numerous blood vessels and nerve bundles were observed within the vomeronasal cartilage encased lamina propria. Immunohistochemistry revealed high expression level of protein gene product9.5 and moderate expression level of olfactory marker protein in the neuroreceptor cells of the VSE and occasionally in some ciliated cells of the VNSE in both neonates and adults. The properties of the glycoconjugates in the VNO were investigated using 21 lectins, most of which were expressed at varied intensities in the VSE and VNSE, as well as in the lamina propria. Several lectins exhibited variations in their intensities and localization between neonatal and adult VNOs. This study is the first descriptive lectin histochemical examination of the VNO of Korean native cattle with a focus on lectin histochemistry, confirming that the VNO of Korean native cattle is differentiated during postnatal development.