Desynapsis and Sterility in <i>Solanum wendlandii</i> Hook

Cytogenetic Analysis of a Desynaptic Mutant in Barley (<i>Hordeum vulgare</i> L.)

“…Obviously, the gene appears to be cor rectly designated as desynaptic. Abnormalities such as clumping of chromosomes at MI, lack of active polar movement at AI as well as A II have also been reported in a number of other cases of desynapsis (Soost 1951, Magoon and Sadasivaiah 1967and Chennaveeraiah and Krishnappa 1968. Thus it may be suggested that the desynapsis is a complicated condition and the lack of chiasma formation is one of its manifestations.…”

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.…”

Occurrene of aneuploid progenies from an asynaptic amphidiploid of Scilla scilloides (Lindley) Druce. I. Chromosome constitutions and reproductive properties of both parental and progeny plants.

“…). In their meiosis, an unequal chromosome distribution has been found usually at anaphase I due to a partial or total failure of homologous chromosomes to pair (Celarier, 1955;Martini and Bozzini, 1966;Chennaveeraiah and Krishnappa, 1968;Prasad and Tripathi, 1986). As a result of meiotic irregularity, unreduced gametes and gametes with aberrant chromosome numbers are produced in Datura (Bergner et al, 1934) and maize (Rhodes, 1947).…”