A minor 9.8 kb rDNA unit of rice variety IR-20

Nandabalan, K. ; Padayatty, J. D. (1989) A minor 9.8 kb rDNA unit of rice variety IR-20 Indian Journal of Biochemistry & Biophysics, 26 (5). pp. 289-292. ISSN 0301-1208

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Abstract

A clone bearing a 9.8 kb EcoRI fragment of rice DNA containing the genes for the rRNAs and the intergenic spacer was identified by screening a rice genomic library in lambda Charon 4 phage with rRNAs. The 9.8 kb EcoRIDNA fragment was found to be a minor rDNA unit of rice variety IR-20. The rRNA genes and the intergenic spacer were mapped by hybridization and nucleotide sequence analyses. The DNAs in the intergenic spacer of the minor rDNA unit of 9.8 kb and the major rDNA unit of 8.9 kb cross-hybridized showing that those regions are homologous.

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