Multivalents inEutettix Apricus(Melich) with Notes on the Chromosomes of Five near Relatives (Jassidae, Homoptera)

An analysis of the chromosomes of leaf-hoppers (Cicadellidae, Homoptera)

“…Very likely such multivalents have originated due to fusion associated with translocation in autosomes. A comparson of the metrical data of Eutettix and its close rela.. tives supports this contention (Bhattacharya, 1976). Metrical data of autosome No.…”

“…The phenomenon of fusion as presumed is supported by the multivalent structures found in species ofEutettix (Bhattacharya, 1976) and Adelodeltocephalus (Whitten & Taylor, 1969). Very likely such multivalents have originated due to fusion associated with translocation in autosomes.…”

“…From this point of view cytogenetic study ofjassids (Cicadellidae) is of significance especially because of their holocentric chromosomes. We have dealt with aspects of the cytology of the endemic Indian Cicadelloidea, Cercopoidea, Fulgoroidea and PsyUoidea in a series of papers (Bhattacharya, 1972a,' b;1973a, b, c, d, e;1975, 1976Bhattacharya & Manna, 1970, 1973a, b and Manna & Bhattacharya, 1973 in an attempt to understand the phylogeny of the group and the evolution of the 'unique' cytogenetic systems discovered in coccids and aphids (Brown, 1965).…”