헐떡이풀의 핵형분석과 Bicolor FISH를 이용한 물리적 지도 작성
Karyotype Analysis and Physical Mapping of rDNAs UsingBicolor-FISH in Tiarella polyphylla D. Don
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Abstract
- Tiarella polyphyllaD. Don (Saxifragaceae) is a perennial herb and distributed in China, Japan, Taiwan andKorea. Especially, it only grows in Ulleung island of Korea. It has been using for asthma, bruise and audition troubleswith main components of some Triterpenoids and seven oleanolic Saponins. There is only known its chromosomalnumber rarely and cytogenetic study was not done. From this study, karyotype analysis and chromosomal localization of5S and 45S rDNAs using bicolor-FISH (fluorescence in situhybridization) were carried out. The somatic metaphasechromosome number was 2n=2x=14 and the size of chromosomes ranged 1.66∼3.50㎛. The chromosome complementconsisted of four pairs of submetacentrics (chromosomes 1, 2, 3 and 6), two pairs of subtelocentrics (chromosomes 5 and7) and one pair of telocentrics (chromosome 4). We also observed NOR (nucleolus organizer region) on the chromosome4. In bicolor-FISH, one pair of 55 and 45S rDNA sites was detected on the centromeric region of chromosome 3 andshort arm of chromosome 4, respectively. Bicolor FISH was very useful tool for the localization and identification ofrDNAs on the chromosomes in Tiarella polyphylla.Key words - Tiarella polyphylla, Karyotype analysis, Bicolor-FISH, 5S rDNA, 45S rDNA
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