Relative rates of divergence of spacer and gene sequences within the rDNA region of species in the Triticeae: Implications for the maintenance of homogeneity of a repeated gene family.
作者： R Appels , J Dvořák , None
DOI: 10.1007/BF00303907
关键词: Spacer DNA 、 Ribosomal RNA 、 Biology 、 Triticeae 、 18S ribosomal RNA 、 Genetics 、 Gene family 、 Internal transcribed spacer 、 Gene conversion 、 Gene
摘要: The relative rates of divergence 11 regions the wheat rDNA cloned in pTA250 were estimated by measuring sequence change 6 Triticum species. Tm analysis 32P probes synthesized from and hybridized to DNA species provided an estimate T. aestivum. results revealed a region 1.2 kb preceding 18S rRNA gene which was more conserved than rest spacer. In addition transcribed spacer between 26S genes shown be poorly-conserved; genes, as expected, highly conserved. A model proposes RNA co-factor conversion is suggested account for observations.
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