The genus Avena L. (Poaceae) comprises a polyploid series ofdiploid, tetraploid and hexaploid species with a basic chromosome number of seven. Four genomes (A, B, C and D) have been identified based on comparative karyotyping (Rajhathy and Thomas 1974). The genomic in situ hybridizatjon (GISH) technique using A, eriantha's (CC) total DNA probe has been ibund to be very usefu1 fbr distinguishing...

A variety of nucleoside analogs have shown carcinostatic activity. In some instances they are relatively rapidly excreted. In others they are relatively rapidly inactivated in vivo by catabolic enzymes. In both cases it appeared desirable to have nucleoside derivatives that would act as depot forms of the nucleoside analogs and would be converted in vivo to the respective nucleoside analog. Gis...

Intractable epilepsies, that is, seizure disorders that do not respond to currently available therapies, are difficult, often tragic, neurological disorders. Na(+) channelopathies have been implicated in some intractable epilepsies, including Dravet syndrome (Dravet 1978), but little progress has been forthcoming in therapeutics. Here we examine a Drosophila model for intractable epilepsy, the ...

Four somatic hybrids derived from a diploid wild species Solanum etuberosum and a diploid tuber-bearing Solanum clone 463-4, together with five BC1 and three BC2 plants, were analyzed by genomic in situ hybridization (GISH). None of the four somatic hybrids had the expected chromosome constitutions, i.e., 24 chromosomes from each fusion parent. Either one chromosome from S. etuberosum or one fr...

The meiotic behavior of pollen mother cells (PMCs) of the F2 and F3 progeny from Triticum timopheevii × hexaploid wild oat was investigated by cytological analysis and sequential C-banding-genomic in situ hybridization (GISH) in the present study. A cytological analysis showed that the chromosome numbers of the F2 and F3 progeny ranged from 28 to 41. A large number of univalents, lagging chromo...

GISH (genomic in situ hybridization) was applied for the analysis of mitotic chromosome constitutions of somatic hybrids and their derivatives between dihaploid clones of cultivated potato (Solanum tuberosum L.) (2n = 2x = 24, AA genome) and the diploid, non-tuberous, wild species Solanum brevidens Phil. (2n = 2x = 24, EE genome). Of the primary somatic hybrids, both tetraploid (2n = 4x) and he...