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자료유형
학술저널
저자정보
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한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY JOURNAL OF THE KOREAN SOCIETY FOR HORTICULTURAL SCIENCE Vol.45 No.6
발행연도
2004.12
수록면
299 - 306 (8page)

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Identification and DNA polymorphism of the kinase domain of S-locus receptor kinase (SRK) which participates in the self-incompatibility of Brassicaceae were analyzed by polymerase chain reaction (PCR)-restriction fragment length polymorphism and nucleotide sequencing. In the PCR experiment, a SRK-specific primer pair (KS 5 and KA 7) of the class Ⅰ amplified a single DNA fragment of about 900 bp from 61 lines out of 134 inbred lines. Four groups were found in a double digestion with HinfⅠ and EcoRⅡ using the class Ⅰ SRK-specific primer pairs. Also, the rest of the lines which were not amplified with class Ⅰ SRK-specific primer pairs gave exactly one single DNA fragment from 1,050 bp with class Ⅱ SRK-specific primer pair (KS 4 and KA 8). These 1,050 kinase domains of the SRK gene in Chinese cabbage were divided into four groups when they were digested in HinfⅠ or AluⅠ, respectively. These observations suggested that these primers were able to differentiate accurately between class Ⅰ and Ⅱ. The Chinese cabbage inbred lines used consisted of eight different S-haplotypes, and 61 lines belonging to class Ⅰ consisted of four different S-haplotypes, and 73 lines belonging to class Ⅱ consisted of four different S-haplotypes. Nucleotide sequencing of the DNA fragments amplified from eight different S-haplotypes showed that exons of 3' end in SRK were highly conserved, and that there were high variations of introns. Also, the eight different S-haplotypes could be divided into two classes (class Ⅰ and Ⅱ) based on nucleotide sequence similarities. The sequence similarity within class Ⅰ and Ⅱ S-haplotypes exhibited 82-93 and 94-99% identity, respectively. While between class Ⅰ and Ⅱ S-haplotypes, there was a lower degree of sequence conservation with approximately 66-71% sequence identity.

목차

Abstract
Introduction
Materials and Methods
Results
Discussion
Acknowledgment
Literature Cited

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