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Results and Discussion
A. C-banding patterns of Hordeum vulgare
CARINA
Numbering order of chromosomes was put according to the
standard karyotype (TJIO & HAGBERG and subsequent
workers). The C-banding pattern appears in Fig.
1A.
Chromosome 1. Each arm shows a centromeric band of
equal size. In addition the long arm has two interstitial
bands.
Chrom. 2. Both arms lack precise centromeric bands,
yet each of them shows two bands in the corresponding
proximal regions, the one quite near the centromere
(pericentric).
Chrom. 3. Three bands were totally observed. Two of
them were on the short arm, the one centromeric and larger.
The position of the one band observed on the long arm was
almost median.
Crom. 4. It is a heavily banded chromosome, with
three bands on each arm. The two centromeric bands appeared
very large with the largest one on the short arm.
Chrom. 5. There was found evident difference between
the two arms in banding pattern. The short arm (the shortest
in the barley chromosome complement) showed a large
centromeric band. The long arm possessed an almost
medium-sized interstitial band.
Chrom. 6. Each arm is characterized by the presence
of two bands, the one centromeric (very large on the short
arm relatively small on the long one), and the second almost
pericentric.
Chrom. 7. There were observed two large cenntromeric
bands the larger on the long arm. The same arm possesses
another evident band, rather proximal.
B. C-banding pattern of Hordeum vulgare
GEORGIA
The basic banding pattern appeared to be the same with that
of CARINA apart from chromosomes 2 and 7 (Fig.
1C).
In detail : On chromosome 2, two more bands were found,
lying at the distal region of the short arm equilocally
distributed. On chromosome 7, two additional bands, one per
arm, were recognized. More concretely, on the short arm (the
satellited) was observed a medianpositioned band, fairly
narrow, whereas on the long arm a narrow band was also
detected, at very distal region. Thus, band polymorphism
recognized on chromosomes 2 and 7 resulted in two banding
pattern variants, not included in the polymorphic types
presented by LINDE- LAURSEN et al. (1982).
Comparatively with his results chromosome 7 variant observed
by us could be attributed to a possible exchange of the long
armed distal parts between chromosome 5 and chromosome 7.
This suggestion of course, could be thoroughly verified only
by meiotic studies.
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