Partial Desynapsis in <i>Pennisetum ramosum</i> (Hochst.) Schweinf

A EMS-induced bushy mutant of Nigella sativa L. with desynaptic behaviour of chromosomes.

“…In the present case, desynap sis may be considered as partial or weak because a high frequency of bivalents per cell (4.70-5.24) was found in the mutant line in comparison to that of univalents (1.53-2.59). Such partial or weak desynapsis has also been previously reported in other plant species (Goodspeed and Avery 1939, Johnson 1944, Jauhar et al . 1971, Srivastava 1974.…”

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.…”

Induced desynaptic variation in poppy (Papaver somniferum L.)

“…Both spontaneous and induced types of desynapsis have been reported in different plant species like Pennisetum ramosum (Jauhar et al 1971), Zinnia haegena (Singh and Gupta 1981), Capsicum annum (Rao and Kumar 1983), Hordeum vulgare (Srivastava 1974, Kumar andSingh 2002), Oryza sativa (Reddi and Rao 2000), Cicer arietinum (Kumar and Sharma 2001), Anogeissussericea (Rao and Kumar 2003), Glycine max (Palmer and Horner 2000, Bione et al 2002, Kumar and Rai 2006, Corchorus fascicularis (Maity and Datta 2009). Thus, desynapsis is an important cytological phenomenon and desynaptic plants offer possibility for the production of aneuploids (Soost 1951, Burnham 1962.…”