Chromosome Studies on Eight Species of Sciara (Diptera) with Special Reference to Chromosome Changes of Evolutionary Significance

GENE ARRANGEMENTS IN NATURAL POPULATIONS OFDROSOPHILA ROBUSTASTURTEVANT

“…Such inversions have been described from a number of species (D. ananassae, Kaufmann, 1936;Kikkawa, 1938, Dobzhansky andDreyfus, 1943;D. nebulosa, Pavan, 1946; and several species of Sciara, Carson, 1944;McCarthy, 1945). Such inversions should no longer be considered as special cases, although their relationship to the telomere is in need of investigation.…”

Chromosome Studies in a Species ofTelmatoscopus Sp

“…4 and 5). Natural heterozygosity of bands and puffs in polytene chromosomes have been observed by different authors in other species of diptera (METZ 1935(METZ , 1937CARSON 1944;McCARTHY 1945;Hsu and Lw 1948;ScHREIBER and GuEDES 1961;PANITZ 1960PANITZ , 1965PAVAN and PERONDINI 1967).…”

“…In natural populations it has been observed in Chironomus obtusidense (KEYL 1964), Acricotopus lucidus (MECHELKE 1960;PANITZ 1965), Twinia sp (ROTHFELDS and FREEMAN 1966) and in species of Sciara (METZ 1935(METZ , 1937(METZ , 1938(METZ , 1947CARSON 1944;McCARTHY 1945;PAvAN and PERONDINI 1967;PERONDINI and DESSEN 1969).…”

Cytogenetics, Distribution and Phenotypic Effects of a Translocation in Swedish Cattle

“…The demonstration of T chromosomes in maize following the induction of terminal deletions ( MCCLINTOCK, 1931 ;STADLER and SPRAGUE, 1936) and the occurrence of spontaneous terminal inversions in different species of Drosophiln and Scinrcc (MCCARTHY, 1945) further support the theory of the existence of stable T chromosomes. So do some recent reports (WOLF, 1960;MATTHEY, 1963 b).…”