Cloning and Characterization of Genes Controlling Flower Color in Pharbitis nil Using AFLP (Amplified Fragment Length Polymorphism) and DDRT (Differential Display Reverse Transcription)

  • Kim, Eun-Mi (Department of Biology Chungnam National University) ;
  • Jueson Maeng (department of Life Science, Sognag University) ;
  • Lim, Yong-Pyo (Horticulture Chungnam National University) ;
  • Yoonkang Hur (Department of Biology Chungnam National University)
  • Published : 2000.06.01

Abstract

To analyze molecular traits determining pigmentation between Pharbitis nill violet and white, Amplified Fragment Length Polymorphism(AFLP) and Differential Display Reverse Transcription(DDRT) experiments were carried out with either genomic DNAs or total RNAs isolated from both plants. Results of AFLP experiment in combination of 8 EcoRⅠ primers with 6 MseⅠ primers showed 41 violet-and 60 white-specific DNA bands. In the subsequent experiment, 22 violet-and 22 white-specific DNA fragments were amplified by PCR with DNAs eluted. The sizes of the fragments range from 200 to 600bp. DDRT using total RNA produced 19 violet-and 17 white-specific cDNA fragments, ranging from 200 to 600bp. The fragments obtained by both AFLP and DDRT had been cloned into pGEM T-easy vector, amplified and subjected to the nucleotide sequence analyses. As a result of Blast sequence analysis, most of them sequenced up to date showed no similarity to any Known gene, while few has similarity to known animal or plant genes. An AFLP clone V6, for example, has a strong sequence similarity to the human transcription factor LZIP-alpha mRNA and a DDRT clone W19 to Solanum tuberosum 3-hydroxy-3-methylglutaryl coenzyme A reductase mRNA.

Keywords

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