期刊
CURRENT GENETICS
卷 37, 期 1, 页码 34-38出版社
SPRINGER VERLAG
DOI: 10.1007/s002940050005
关键词
sugar beet; mitochondrial genome; minisatellite; variable number of tandem repeats
We found four unrelated tandem repeat loci (TR1, TR2, TR3 and TR4) in the mitochondrial genomes of beets, with the TR1 locus embedded within a three-membered family of recombining repeat sequences (the rrn26-repeat). TR1 is composed of an array of 32-bp tandem repeats, the number of which varies from 2 to 13 among the seven beet genotypes examined. It is interesting to note that TR1 has 7-bp direct repeats flanking the array, which may be involved in the generation of the tandem repeat array. Such striking features are shared by the remaining TR loci, and this is thus the first description of minisatellite nucleotide sequences from a higher-plant mitochondrial genome.
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