Indian Society of Genetics & Plant Breeding
From the selfed progency of three desynaptic mutants, 38 primary trisomic plants
were isolated. These trisomic plants were classified into seven types based on their
identifiable morphological traits. Pollen sterility ranged from 35-90 per cent and ovule
sterility ranged from 56-97 per cent. They showed different types of chromosome
associations at MI which were trivalent, bivalent and univalent. Range of univalents
was 2-13 while, the range of bivalents was 1-6 per cell. Average number of trivalents/cell
was 0.09 to 0.43, average number of bivalents/cell was 3.3-4.16 and average number
of univalents/cell was 5.93-7.41 in these trisomies. Different types of AI separations
such as 9-6 and 8-7 were observed and the average number of laggards/cell was
0.96-1.4. Lagging of chromosomes and formation of bridges at A II and presence of
micronuclei in spores were also observed in these trisomics.
Keywords: Barley, desynaptic mutants, trisomies, cytomorphology
Year: 2000
Volume: 60
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
M. R. SINGH AND GANESH PRASAD info_circle
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