In M
1, the PMC showed abnormalities, which appeared to have increased with dose, and they persisted through out the development of the shoot.
In M
2 the PMC with aberrations were far fewer than in M
1, but their presence in M
2 shows that they have been perpetuated through the male and female gametes of M
1 generation.
The types of aberrations recorded were translocations, bridges, micronuclei, pairing difficulties and pollen abnormalities.
The low fertility following high doses in M
1 plants, may be attributed to the phenomenon of chromosomal aberrations and change in the nature of the gene, thereby, creating pairing difficulties.
The persistence of abnormalities in M
2 generation indicates, that they may either take considerable time to be eliminated or they might have become a permanent feature of the plants.
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