Genomic distribution of 5S and 25S rDNA sites in diploids
Among most diploid accessions examined, a common
distribution pattern of rDNA sites was observed, involving
three chromosome pairs. In this pattern (Figures
1A-1G, Figure 2A) six 25S rDNA sites were localized on
three chromosome pairs, one of which was also marked
by a pair of 5S rDNA sites. Among these three chromosome
pairs, we designated the medium-sized submetacentric
pair that is “single-marked” by 25S rDNA signals
as the “M pair”. The other two marked pairs (S1 and
S2) were the smallest among the seven chromosome
pairs, and were either submeta- or subtelo-centric. A
pair of 25S rDNA signals was present on one of these
two small chromosome pairs, hereafter referred to as
the “S1 pair” (for the small-sized, “single-marked” pair),
while the small, “double-marked” pair with both 25S
and 5S sites was designated the “S2 pair” (Figure 2).
Genomic distribution of 5S and 25S rDNA sites in diploids
Among most diploid accessions examined, a common
distribution pattern of rDNA sites was observed, involving
three chromosome pairs. In this pattern (Figures
1A-1G, Figure 2A) six 25S rDNA sites were localized on
three chromosome pairs, one of which was also marked
by a pair of 5S rDNA sites. Among these three chromosome
pairs, we designated the medium-sized submetacentric
pair that is “single-marked” by 25S rDNA signals
as the “M pair”. The other two marked pairs (S1 and
S2) were the smallest among the seven chromosome
pairs, and were either submeta- or subtelo-centric. A
pair of 25S rDNA signals was present on one of these
two small chromosome pairs, hereafter referred to as
the “S1 pair” (for the small-sized, “single-marked” pair),
while the small, “double-marked” pair with both 25S
and 5S sites was designated the “S2 pair” (Figure 2).
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