• 한국약용작물학회지
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• 제18권3호
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• pp.186-190
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• 2010

The chromosome number was identified and fluorescence in situ hybridization(FISH) mapping of 5S and 45S rDNAs were conducted for C. minima and C. lanceolata in the genus Codonopsis from Jeju island. In this study, we have confirmed that the somatic metaphase chromosome number determined as 2n=2x=16 was the same as the findings from the previous studies. While the conventional staining method makes it rather difficult to distinguish satellite chromosomes due to high degree of variability, FISH analysis produced the exact number and location of 5S and 45S rDNAs. Both species in the genus Codonopsis have a pair of 5S rDNA and their gene loci were observed on chromosome 3. Although two pairs of 45S rDNAs (one on chromosome 1 and the other on chromosome 8) were identified in both species, the 45S rDNA signals on chromosome 8 in C. minima were significantly weaker than those on chromosome 1. In addition, the 45S rDNA signals on chromosome 1 in C. lanceolata showed that the chromosome is non-homologus. In this study, we have determined cytogenetic characteristics of C. minima and C. lanceolata according to their gene replication patterns.

• 생약학회지
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• 제1권1호
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• pp.19-24
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• 1970

A comparative study on 'Dang-gui' and 'Kang-whal' the two species of Angelica growing in Korea was carried out about the morphology and cytology. The somatic chromosome number of Cham dang-gui, Ill dang-gui, Badi-namul was found to be 2N=22. The somatic chromosome number of Kang-whal was found to be 2N=110, that of Chili kang-whal to be 2N=44, that of Mul kang-whal to be 2N=22. Stoma of species of Dang-gui were same in size. Those of Chili kang-whal and Kang-whal were strikingly larger than the other. Chili kang-whal and Kang-whal were verified to be polyploid in the genus Angelica.

• 식물분류학회지
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• 제47권4호
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• pp.304-307
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• 2017

We report somatic chromosome numbers for three species belonging to the Euphorbia pekinensis complex distributed in Far East Asia. In E. pekinensis populations distributed in Korea, 2n = 28 and 56 were found, while the Japanese native E. lasiocaula was also found at 2n = 28 and 56 and the Japanese endemic E. sinanensis was found at 2n = 20. Based on the number of chromosomes, E. lasiocaula distributed in Japan supports treatment as a variety of E. pekinensis rather than as a different species, while E. sinanensis should be recognized as a distinct species rather than as a variety of E. pekinensis. In the same populations of E. pekinensis and E. lasiocaula, diploid and tetraploid individuals were found, and the diversity of these chromosome numbers was consistent with the morphological diversity of these populations, suggesting the future evolutionary potential of this species.

• 한국산림과학회지
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• 제62권1호
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• pp.60-67
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• 1983

Abies 속(屬)에 있어서 한국자생종(韓國自生種)인 3종(種)과 일본(日本)에서 도입(導入)된 A. firma 등 4종(種)에 대한 유연관계(類緣關係)를 연구(硏究)하기 위하여 체염색체(體染色體)에 대한 핵형분석(核型分析)을 행(行)한 결과(結果)를 요약(要約)하면 1) 체세포(體細胞)의 염색체수(染色體數)는 4개종(個種) 공(共)히 2n=24 이고 2) 단완(短腕)의 길이의 순(順)으로 염색체(染色體)를 배치(配置)했을 때 (1), 9번(番) 염색체(染色體)의 long arm이 A. holophylla가 다른 3종(種)에 비(比)해 길어서 종식별(種識別)의 특징(特徵)이 될 수 있으며 (2), 장완(長腕) : 단완비(短腕比)(b/a)치(値)도 종(種) 식별(識別)에 유효(有效)했으며 특(特)히 그 평균치(平均値)가 A. koreana와 A. nephrolepis가 유사(類似)하고, A. holophylla와 A. firma가 유사(類似)했다. 3) Short arm 의 길이의 순(順)으로 배치(配置)했을 때 b/a치(値)의 순위(順位)는 8개(個)의 염색체(染色體)가 A. koreana와 A. nephrolepis가 같은 순위(順位)에 있고 A. holophylla와 A. firma는 2개염색체(個染色體)가 각각(各各) 유사성(類似性)이 있었다. 4) Total length의 크기의 순(順)으로 염색체(染色體)를 배치(配置)했을 때 7번(番) 및 8번(番)의 염색체(染色體)가 A. koreana와 A. nephrolepis에서 서로 유사(類似)한 특징적(特徵的)인 염색체(染色體)였다. 5) Total length의 길이 순(順)으로 배치(配置)했을 때 b/a치(値)의 순위(順位)는 A. koreana, A. nephrolepis에서 6개(個)의 염색체(染色體)가 같은 순위(順位)이고 A. holophylla와 A. firma에서는 2개(個)의 염색체(染色體)가 같은 순위(順位)에 있다. 6) Long arm의 길이의 순(順)으로 염색체(染色體)를 배치(配置)했을 때 1번(番) 염색체(染色體)가 A. koreana와 A. nephrolepis에 있어서 b/a치(値)가 큰데 비(比)하여 A. holophylla와 A. firma의 b/a치(値)는 공(共)히 작았다. 이상의 결과(結果)를 종합(綜合)하면 핵형분석결과(核型分析結果) 염색체(染色體)의 크기, Centromere를 중심(中心)으로 한 단(短), 장완(長腕)의 크기나 그 비치(比値), 또는 단완(短腕), 장완(長腕), 전장(全長)을 각각(各各) 기준(基準)으로 하여 크기 순(順)으로 배치(配置)했을 때의 특이성(特異性) 등이 종(種)의 특징(特徵)과 수종간(樹種間)의 유연성(類緣性)을 나타내는 좋은 기준(基準)이 될 수 있었다.

• 식물분류학회지
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• 제52권4호
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• pp.214-218
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• 2022

Eleocharis R. Br. (Cyperaceae) is characterized by unbranched culms, one terminal spikelet, bisexual flowers, and bristly perianths, occurring mainly in circumboreal marshes and wetlands. There are about 250 species worldwide, and 15 taxa in Korea have been recognized. Chromosomes in Cyperaceae are known to be holocentric, missing constricted centromeres during cell division. For the first time, we report the chromosome counts of Eleocharis from Korean populations of E. attenuata f. laeviseta (Nakai) H. Hara (2n = 20); E. parvula (Roem. & Schult.) Link ex Bluff, Nees & Schauer (2n = 10); E. ussuriensis Zinserl. (2n = 16); and E. valleculosa var. setosa Ohwi (2n = 16). The populations exhibit variations in their chromosome sizes from ca.1.7 ㎛ to ca. 6 ㎛, categorized as gradient and bimodal karyotypes. The karyotypes observed are congruent with previous phylogenetic groups proposed. To clarify the traditional and phylogenetic classification of Korean Eleocharis, further taxonomic and chromosomal investigations with additional taxon sampling efforts are required.

• 한국동물번식학회:학술대회논문집
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• 한국동물번식학회 2001년도 춘계학술발표대회
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• pp.18-18
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• 2001

Despite of importance of integrated events of nucleus and microtubule remodeling in nuclear transferred embryos with somatic cells, little information is available on this subject. In this study we configured chromatin and microtubule organization following somatic cell nuclear transfer in pre- and non-activated bovine oocytes in order to clearify nuclear remodeling process and to demonstrate centrosome inheritance during nuclear transfer. The cumulus-oocyte complexes were collected from slaughterhouse and were matured in vitro for 20 h in TCM 199 supplemented hormone. Matured bovine oocytes were enucleated by aspirating the frist polar body and metaphase chromatin using a beveled pipette. Bovine fibroblast cells were fused into enucleated oocyte by electrical stimulation. Reconstructed oocytes were activated with ionomycine and 6-dimethylaminopurin, and then cultured in CRlaa medium. The organization of nuclear and microtubules were observed using laser-scanning confocal microscopy. At 1 hour after fusion, microtubule aster was seen near the transferred nucleus in most oocytes regardless activation condition. While most of fibroblast nuclei remodeled to premature chromosome condensation (PCC) and to the two masses of chromosome in non-activated oocytes, a few number of fibloblasts went to PCC and multiple pronuclear like structures in activated oocytes. Microtubular spindle was seen around condensed chromosome. Gamma-tubulin was detected in the vicinity of condensed chromosome, suggesting this is a transient spindle. The spindle seperated nucleus into two masses of chromatin which developed to the pronuclear like structures. Two pronuclear like structures were than apposed by microtubular aster and formed one syngamy like nuclear structure at 15 h following nuclear transfer. At 17 to 18 h after fusion, two centrosomes were seen near the nucleus, which nucleates micrtubules for two cell cleavage. While 31% of reconstructed oocytes in non-activated condition developed to morulae and blastocysts, a few reconstructed oocytes in pre-activated condition developed to the blastocyst. These results suggested introduction of foreign centrosome during nuclear transfer, which appeared to give an important role for somatic cell nuclear reprogramming.

• 식물분류학회지
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• 제42권4호
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• pp.307-315
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• 2012

한국산 나비나물속(Vicia)에 속하는 10분류군의 체세포 염색체수와 그 중 6분류군에 대한 핵형분석을 실시하였다. 본 연구에서 밝혀진 나비나물속의 체세포 염색체수는 2n = 12, 14 또는 24로서, 기본 염색체수 x = 6 또는 7의 이배체와 사배체로 밝혀졌다. 한국특산식물인 나래완두(V. hirticalycina, 2n = 2x = 12)의 염색체수는 본 연구에서 처음으로 밝혀졌다. 가는살갈퀴(V. angustifolia, 2n = 2x = 12), 등갈퀴나물(V. cracca, 2n = 4x = 24), 새완두(V. hirsuta, 2n = 2x = 14), 얼치기완두(V. tetrasperma, 2n = 2x = 14 + 2B), 벌완두(V. amurensis, 2n = 2x = 12), 노랑갈퀴(V. chosenensis, 2n = 2x = 12, 12 + 2B), 나비나물(V. unijuga, 2n = 4x = 24), 애기나비나물(V. unijuga f. minor, 2n = 4x = 24), 광릉갈퀴(V. venosa var. cuspidata, 2n = 4x = 24)의 체세포 염색체수는 기존의 보고들과 일치하였다. 핵형분석 결과, 등갈퀴나물은 2 m + 8 sm+ 2 st, 벌완두는 2 m + 2 sm + 2st, 나래완두는 3 m + 1 sm+ 2 st, 나비나물과 애기나비나물은 4 m + 6 sm + 2 st, 광릉갈퀴는 4 m + 8 sm로 각각 조사되었다.

• Journal of Plant Biotechnology
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• 제2권2호
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• pp.109-113
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• 2000

Somatic hybrids were produced by electrofusion between embryogenic callus protoplasts of 'Syougun' mandarin and leaf protoplasts of grapefruit. Hybridity of the two plants was confirmed by leaf morphological characteristics and random amplified polymorphic DNA (RAPD) analysis. The cpDNA analysis using PCR-RFLP could not distinguish those of both parents. These plants showed normal growth and had chromosome number of 27. These unexpected triploid somatic hybrids might be derived from fused cells between diaploid protoplast of embryogenic calli and diploid protoplast of leaf, because polysomaty, a mixture of haploid cells and diploid cells was observed in the lactose medium-pretreated embryogenic calli of 'Syougun' by flow cytomehy analysis.

• 한국가축번식학회지
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• 제27권1호
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• pp.53-59
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• 2003

본 연구에서는 한우 태아의 시기별로 35일령, 50일령, 70일령 및 90일령의 fetal fibroblast cell line을 생산하였고, bovine-specific primer와 Y chromosome-specific primer를 이용하여 PCR에 의해 성을 판별하여 각각 암수 2 line의 한우 fetal fibroblast cell line을 확립하였다. 이들 cell line을 계대배양하여 passage number가 10 이상에서 염색체 분석을 실시하였는데 모두에서 80%이상의 세포가 60개의 정상 염색체수의 나타내어 계대배양이 karyotype에 영향을 미치지 않는 것으로 나타났다. Serum starvation과 confluent 배양 방법을 이용하여 Go 상태로 유도되었는지 확인하기 위해 PCNA antibody를 이용하여 Western blotting 분석을 실시하였는데 PCNA 발현이 현저히 감소되는 것을 확인할 수 있었고, 다시 정상 medium으로 환원시켰을 때 세포분열이 재개되어 Go상태로 유도되었음을 확인할 수 있었다. 또한 serum stravation 방법이 conflent한 배양방법보다 PCNA 발현양이 적은 것으로 나타나 좀더 효율적인 Go 상태 세포 주기 조절방법으로 판명되었다.

• 식물분류학회지
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• 제41권2호
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• pp.113-118
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• 2011

한국산 금방망이속(Senecio L.) 및 근연속인 국화방망이속(Sinosenecio B. Nord.), 솜방망이속 (Tephroseris (Rchb.) Rchb.)에 속하는 8분류군을 대상으로 체세포 염색체수를 조사하였다. 체세포 염색체수는 2n = 40, 2n = 44인 종류와 2n = 48인 종류로 구분되었으며, 2n = 40인 분류군은 쑥방망이(Senecio argunensis Turcz.), 금방망이(S. nemorensis L.), 개쑥갓(S. vulgaris L.), 산솜방망이(Tephroseris flammea (DC.) Holub)이었다. 2n = 44인 분류군은 바위솜나물(T. phaeantha (Nakai) C. Jeffrey & Y.L. Chen)이었으며, 2n = 48인 분류군은 국화방망이(Sinosenecio koreanus (Kom.) B. Nord.), 솜방망이(T. kirilowii (Turcz. ex DC.) Holub), 물솜방망이(T. pierotii (Miq.) Holub.)로서, 이중 국화방망이와 산솜방망이, 바위솜나물은 기존의 연구 결과와 차이를 보였다.