Indian Society of Genetics & Plant Breeding

Numerical heterogeneity of chromosomes and nucleoli in Saccharum spp. hybrids

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Numerical chromosomal aberrations and their correlation
with the extent of nucleolar variations was studied in
seven commercial hybrids of sugarcane of subtropical
India. Extensive chromosome mosaicism (2n = 92-126)
and wide variation with respect to nucleolus number per
cell (1-8) was observed in these clones. Numerical
Aberration Factor (NAF) has been suggested to ascertain
the extent of somatic chromosome variation in mosaic
genotypes. The NAF value was highest in the old elite
clone Co 1148. The regression analysis of NAF value
on nucleoli variation per cell showed a linear relationship
(r = 0.65) indicating that, intra-clonal heterogeneity of
chromosome number has a direct influence (to a certain
limit) on extensive nucleolar variations present in these

Keywords: Sugarcane, chromosome mosaiCism, mitosis, nucleoli variation, Numerical Aberration Factor (NAF)


Year: 2002
Volume: 62
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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