Multifaceted approach to evaluate the relationship among closely related forms ofDrosophila

Abstract

Drosophila is a suitable system to study different facets of population differentiation. Drosophila suljuriqaster, Drosophila bilimbata. Drosophila albostriqata, Drosophila lleOllaSlIllI and Drosophila pulaua are morphologically indistinguishable members of the orbital sheen complex of the IWSl/la subgroup of Drosophila. They are distributed in difTcrent parts of south cast Asia. The evolutionary inter-relationship between these closely related forms will be discussed with reference to karyotypcs, heterochromatin. satellite DNA. population fitness. ccogcnctic divergence and isozyme variations.

Metaphase karyotype differentiation in eight species of the montium subgroup of Drosophila

“…ganath & Ushakumari, 1987). On the other hand, certain Hawaiian species of Drosophila with pronounced morphological divergence do not show obvious differences in their mitotic metaphases (Carson etal., 1967;Chang & Carson, 1985).…”

Molecular phylogeny of the <i>nasuta</i> subgroup of <i>Drosophila </i>based on 12S rRNA, 16S rRNA and CoI mitochondrial genes, RAPD and ISSR polymorphisms

“…From the beginning of the pioneering work of Wilson et al, (1969), phylogeny of the nasuta subgroup has been extensively studied at various levels of organiEdited by Masatoshi Yamamoto * Corresponding author. E-mail: drosrang@sancharnet.in zations namely, morphophenotypes (Nirmala and Krishnamurthy, 1972), hybridization and hybrid sterility (Ramachandra and Ranganath, 1988), karyotypes (Ranganath and Hägele, 1981;Wakahama et al, 1983;Ranganath and Ushakumari, 1987;Rao and Ranganath, 1991), hybrid salivary chromosomes (Lambert, 1978;Rajasekarasetty et al, 1980), heterochromatin and satellite DNA (Ranganath et al, 1982;Ranganath and Ushakumari, 1987), isozymes and allozymes (Kanapi and Wheeler, 1970;Ramesh and Rajasekarasetty, 1980), glue proteins (Ramesh and Kalisch, 1989), courtship patterns (Tanuja et al, 2001), courtship song (Shao et al, 1997), mitochondrial DNA (Chang et al, 1989;Yu et al, 1999), and male accessory gland proteins (Ram and Ramesh, 2001).…”