排序方式: 共有91条查询结果,搜索用时 31 毫秒
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Young-Il Cho Jong-Hyun Park Chul-Won Lee Won-Hee Ra Jong-Wook Chung Jung-Ro Lee Kyung-Ho Ma Seok-Young Lee Kang-Seob Lee Myung-Chul Lee Yong-Jin Park 《Genes & genomics.》2011,33(2):187-195
Sixteen polymorphic microsatellite (SSR) markers, developed from an SSR-enriched genomic DNA library of sesame (Sesamum indicum L.), were used to assess genetic diversity, phylogenetic relationships, and population structure among 150 sesame accessions collected from 22 countries. A total of 121 alleles were detected among the sesame accessions. The number of detected alleles varied from 2 to 18, with an average of 7.6 alleles per locus. Polymorphism information content values ranged from 0.03 to 0.79, with an average of 0.42. These values indicated an excess of heterozygous individuals at 16 loci and an excess of homozygous individuals at three loci. Of these, 32 genotype-specific alleles were identified at 11 of 16 polymorphic SSR markers. Cluster analyses were performed by accession and population, revealing a complex accession distribution pattern with mean genetic similarity coefficient of 0.45 by accession and 0.52 by population. The wide variation in genetic similarity among the accessions revealed by SSRs reflected a high level of polymorphism at the DNA level. Model-based structure analysis revealed the presence of three groups that were basically consistent with the clustering results based on genetic distance. These findings may be used to augment the sesame germplasm and to increase the effectiveness of sesame breeding. 相似文献
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LEE Jong-Wook Ki-Beom KIM Jong-Chul JUNG Kyung-Hee JEUN Jung-Han KIM 《Entomological Research》2003,33(1):59-63
ABSTRACT Two Enicospilus species, E. melanocarpus Cameron and E. pseudoconspersae (Sonan), are newly recorded in Korea. A revised key on the whole known Korean species including above two species are presented. 相似文献
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Jung Hwa Oh Jung Tae Lee Eun Sun Yang Jong-Soo Chang Dong Sun Lee Sang Hyun Kim Yung Hyun Choi Jong-Wook Park Taeg Kyu Kwon 《Apoptosis : an international journal on programmed cell death》2009,14(11):1378-1386
Kahweol, the coffee-specific diterpene, has been reported for its tumor cell growth inhibitory activity and anti-carcinogenic
activity. The mechanism by which kahweol initiates apoptosis remains poorly understood. In the present study, we investigated
the effect of kahweol on the apoptotic pathway in U937 human promonocytic cells. We show that kahweol induces apoptosis in
association with the activation of caspase 3 and cytochrome c release from the mitochondria to the cytosol, as well as down-regulation of anti-apoptotic proteins (Bcl-2, Bcl-xL, Mcl-1
and XIAP). Kahweol altered the phosphorylation state of members of the MAPKs and Akt. Ectopic expression of Bcl-2 or constitutive
active Akt (myr-Akt) in U937 cells attenuates kahweol-induced apoptosis. In addition, we have also shown that JNK and Akt
signal pathway plays a crucial role in kahweol-induced apoptosis in U937 cells. Taken together, our results show the activity
of kahweol to modulate multiple components in apoptotic response of human leukemia cells and raise the possibility a novel
therapeutic strategy in hematological malignancies. 相似文献
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Kyaw Thu Moe Weiguo Zhao Hong-Seon Song You-Hyen Kim Jong-Wook Chung Young-Il Cho Pue Hee Park Ha-Seung Park Soo-Cheon Chae Yong-Jin Park 《Biochemical Systematics and Ecology》2010
Cymbidium spp. are important potted flowers with extremely high ornamental and economic value. The present study reports the development of 14 new simple sequence repeat (SSR) markers through the construction of an enriched Cymbidium goeringii library and cross-amplification in Cymbidium sinensis and Cymbidium hybridium. Of 525, 322 (61.33%) clones had SSR motifs and among motifs di-nucleotides were predominant and followed by tri-nucleotide and tetra-nucleotide type. In polymorphic analysis using 14 newly developed SSRs, a total of 201 alleles across 96 Cymbidium accessions were detected with an average of 14.4 per locus. The average heterozygosity was 0.394. The average gene diversity and polymorphism information content values were 0.394 and 0.639, respectively. The mean genetic similarity coefficient was 0.4297, indicating a wide genetic variation among the Cymbidium accessions. These newly developed SSRs will be useful tools for genotype identification, germplasm conservation, molecular breeding, and assessments of genetic diversity and population structure in Cymbidium. 相似文献
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Young-Il Cho Jong-Wook Chung Gi-An Lee Kyung-Ho Ma Anupam Dixit Jae-Gyun Gwag Yong-Jin Park 《Genes & genomics.》2010,32(3):267-273
Millets such as proso millet have excellent nutritional properties and could become a basic resource for crop breeding programs and food diversification. In this study, 25 polymorphic microsatellite markers were developed and characterized through construction of an SSR-enriched library from genomic DNA of proso millet (Panicum miliaceum L.). In total, 110 alleles were detected, with an average of 4.4 alleles per locus. Values of major allele frequency (M AF ) and expected heterozygosity (H E ) ranged from 0.36 to 0.98 (mean = 0.73) and from 0.04 to 0.74 (mean = 0.37), respectively. The mean genetic similarity coefficient was 0.3711, indicating that among 50 accessions of proso millet there was wide genetic variation. The newly developed microsatellite markers should be useful tools for assessing genetic diversity, understanding population structure, and breeding of proso millet. 相似文献
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We used the Braun-Blanquet method to study the vegetation of coastal wetlands in South Korea. Three habitat types were found,
i.e., salt marshes, salt swamps, and sand dunes. These plant communities were classified as: 1) two groups (five associations
each) in the salt marshes that comprised either annual herbaceous halophytes (ClassThero-Salicornietea), or biennial/perennial herbaceous species (ClassAsteretea tripolii); 2) one group in the salt swamps consisting of five hydrophilous halo-tolerant associations (ClassPhragmitetea); and 3) three groups in the sand dunes, including one association of annual herbaceous halophytes (ClassSalsoletea komarovii), seven associations of herbaceous perennial halophytes (ClassGlehnietea littoralis), and one association of shrub perennial halophytes (ClassVrticetea rotundifoliae). These three habitat types accounted for the majority of the six main classifications of coastal vegetation distributed
in South Korea. 相似文献