Untersuchungen am Pachyt�n normaler und r�ntgenbestrahlter Pollenmutterzellen von Solanum lycopersicum

Structural Differences in Chromosomes Distinguish Species in the Tomato Clade

“…Each lateral element (LE) represents a chromosome from 1 of the species, and any significant differences in chromosome structure are reflected in the synaptic pattern of the SC. The higher resolution of electron microscopy can reveal irregularities in synapsis that are too small or too complex to be accurately interpreted by light microscopy of squashes of pachytene chromosomes [Gottschalk, 1951;Menzel, 1962]. Using this higher-resolution assay, we observed mismatched kinetochores, inversion loops, translocations, foldbacks and other synaptic irregularities, most of which had not been observed before in tomato inter-specific hybrids.…”

Genetic Improvement of Tomato

“…Investigation of chromosome structure in pachytene (Brown 1949; Barton 1950Barton , 1951Gottschalk 1951Gottschalk , 1954Grati and Grati 1985) gave an opportunity to identify all the 12 chromosomes.…”

Radiation Genetics of Sesame-Part I

“…cantia are very frequent in the region near the centromere. In the plant Solanum, Gottschalk (1951) found the centromere gegion to be especially sensitive (82.2%) to X-ray breakage, and he also observed a higher breakage frequency in the heterochromatin segments than in the euchromatin regions. Recently, Rees and Thompson (1955) stated that at meiosis in a strain of inbred rye, breakage is localised mainly away from the centromeres towards the end of the chromosomes, closely related to distribution of chiasmata.…”