Meiotic Behaviour of Spontaneous and Mutagen Induced Partial Desynaptic Plants in Pearl Millet

Cytogenetics of Tephrosia I. On the differential chromosome pairing in colchiploid stock of Tephrosia wallichii.

“…Tradescantia (Celarier 1955), Datura (Bergner et al 1934), Nicotiana (Clausen 1931), Triticum (Li et al (1945), Hordeum vulgare (Enns andLarter 1960, Sharma andReinbergs 1974), Allium cepa (Koul 1962, Kaul 1975, A. amplectens (Levan 1940), Pennisetum typhoides (Dhesi et al 1973, Singh et al 1977, P. ramosum (Jauhar et al 1971), Godetia (HA kensson 1943, Coleus (Vasudevan et al 1967), Rye grass (Ahloowalia 1969a, b), Solanum vendlandii (Cheenaveeraiah and Krishnappa 1968), Colocasia antiquorum (Krishnan et al 1970), Amorphophallus companulatus (Magoon and Sadasivaiah 1967), Sorghum (Sadasivaiah and Magoon 1965), Avena (Thomas and Rajhathy 1966), Pisum sativum (Gottschalk 1978). Contrary to the long list of desynaptic plants, asynapsis has been reported in only few viz.…”

Cytology, pollen stainability and yield in desynaptic autotetraploid Capsicum.

“…On the other hand, Levan (1940) in Allium amplectens, Vig and Mehrotra (1965) in Allium odorum and Seetharam et al (1975) in Eleusine coracana concluded that the high frequency of univalents at metaphase I is due to the absolute failure of pairing. In addition to genetic control of synapsis, desynapsis is known to occur due to many other factors, such as drastic temperature fluctuations (Wilson 1959, Utkhede andJain 1974), ageing, reduced water content or ionizing radiations (Singh et al 1977). Colchicine effects followed by genetic control seem responsible for bringing about desynapsis in the present case.…”

Genotype-environment Interaction in the Desynapsis of a Hemerocallis 'Sleeping Beauty' Clone and its Progeny.

“…However, when the number is less than half, the univalents tend to be polar. On the other hand, random distribution of univalents with apparantly no relation with the number of bivalents has been reported a number of desynaptics (Jauhar and Singh 1969, Dhesi et al 1973, Singh et al 1977, Koduru 1980). …”