Karyotypic orthoselection in Drosophila

Ranganath, H. A.; Hägele, Klaus

doi:10.1007/bf00365385

Cited by 31 publications

(19 citation statements)

References 2 publications

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“…Although we are not yet in a position to discuss the exact process of speciation in the immigrans species group and we cannot determine whether f usions or fissions were more important during their evolution, it is possible to say that in the D. nasuta subgroup, chromosomal reconstitutions occurring by f usions were the main factors in their evolutionary process, as pointed by Ranganath and Hagele (1981). If this is true, D, albomicans is the most advanced species in this subgroup.…”

Section: Resultsmentioning

confidence: 96%

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Metaphase chromosome configuration of the immigrans species group of Drosophila.

Wakahama

Shinohara

Hatsumi

et al. 1983

The Japanese journal of genetics

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Metaphase chromosome configurations of 23 species and subspecies belonging to five subgroups of the immigrans species group of Drosophila were examined by the Giemsa staining method, from the point of view of the phylogenetic relationships in this species group.New to science are the descriptions of the karyotypes of five species, Taxon-C, Taxon-F, D, nivei f rons,, D. quadrilineata and D, neohypocausta which are 2n=8, 2R+1V+1D; 2n=8, 2R+1V+1D; 2n=8, 2R+1V+1D; 2n =12, 4R+ 1V+ 1D; and 2n = 6, 2R+ 1V, respectively.The karyotypes of the other species were also examined and compared with earlier descriptions. Some of our observations agreed with earlier ones but the remainder showed some major or minor differences from the previous reports.The basic karyotype of the species belonging to the immigrans species group was 2n=8, 2R+1V+1D (or short rod). The karyotypes of D. annul ipes and D. quadrilineata of the D. quadrilineata subgroup, of D, argentostriata and D, silvistriata of the D, lineosa subgroup and of D, neohypocausta of the D. hypocausta subgroup differed fundamentally from the basic type of the immigrans species group. These five species might be somewhat remote from the other species of the immigrans group.Some species exhibited intraspecific variations among the forms of the Y chromosome and Chromosome 4, with additional heterochromatin.In the D. nasuta subgroup, it seemed that fusions were important factors in their evolution. D, albomicans is the most advanced species, and from considerations of morphological similarities, results of hybridization tests, karyotypes, and geographical distribution, D, nasuta is the most plausible species from which D, albomicans originated. D, albomicans collected from the Chiangmai population in Thailand had supernumerary chromosomes, the most peculiar phenomenon among the karyotype variations of the immigrans species group. These chromosomes may be maintained consistently in this population.

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Section: Resultsmentioning

confidence: 96%

“…When considering the D. nasuta subgroup, Ranganath and Hagele (1981) proposed the orthoselection theory. According to them, one metacentric chromosome was produced by one centric fusion between two primitive rods and a second centric fusion between other original elements yielded the second pair of metacentrics.…”

Section: Resultsmentioning

confidence: 99%

Metaphase chromosome configuration of the immigrans species group of Drosophila.

Wakahama

Shinohara

Hatsumi

et al. 1983

The Japanese journal of genetics

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“…Email: nbruom@gmail.com karyotype of Cytorace 1, there is no freely available X-chromosome and it always existed as a part of the X3 a chromosome. This centric fission has occurred in the metacentric X3 chromosome of D. n. albomicans, which is phylogenetically a product of three centric fusions (Ranganath & Hagele 1981). The derivative race of this centric fission event is known as the Fissioncytorace-1 ( Figure 1) with a diploid number of 2n = 8, both in males (2 a 2 n 3 n 3 n XsmY n 4 n 4 n ) and females (2 a 2 n 3 n 3 n XsmXsm4 n 4 n ), wherein the Xsm indicates the new submetacentric X-chromosome.…”

Section: Introductionmentioning

confidence: 99%

Genomic introgression in laboratory evolved hybrid races, Cytorace 1 and Fissioncytorace-1 ofNasuta-albomicanscomplex (NAC) ofDrosophila(Insecta, Diptera) as revealed by RAPD and ISSR markers

Thongatabam

Ramachandra

2012

Italian Journal of Zoology

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Nasuta-albomicans complex (NAC) of Drosophila is an artificial hybrid zone comprising of Drosophila nasuta nasuta, Drosophila nasuta albomicans and 16 Cytoraces, which are the evolutionary products of a long range hybridization experiment conducted in the laboratory environment. Occurrence of centric fission in the X3 chromosome of Cytorace 1 led to the derivation of Fissioncytorace-1. Molecular techniques have emerged as powerful and valuable tools for detection and exploitation of genetic polymorphism. In the present study, Cytorace 1 and Fissioncytorace-1 were subjected to Random Amplified Polymorphic DNA (RAPD) and Inter Simple Sequence Repeats (ISSR) analyses to determine the introgression of D. n. nasuta and D. n. albomicans genomes. It was found that Cytorace 1 and Fissioncytorace-1 exhibit similarities in RAPD and ISSR profiles although different combinations of genomic regions could have favoured Fissioncytorace-1, for better morphophenotypes and fitness, when compared to Cytorace 1, which has existed for over 15 years from the time of its evolution in the laboratory environment.

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“…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).…”

Section: Introductionmentioning

confidence: 99%

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

2004

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The nasuta subgroup is a cluster of morphologically almost similar forms with a wide range of geographic distribution. During the last three decades nature of inter-relationship among the members has been investigated at different levels of organization. The phylogenetic relationships of the members of the nasuta subgroup of the immigrans species group of Drosophila was made by employing Random Amplified Polymorphic DNA (RAPD), Inter Simple Sequence Repeats-PCR (ISSR-PCR) polymorphisms, mitochondrial 12S rRNA, 16S rRNA and Cytochrome C Oxidase subunit I (CoI) gene sequences. The phylogenetic tree generated by RAPD analysis is in nearly complete congruence with the classification based on morphophenotypic characters. The 12S and 16S rRNA genes were highly conserved across the nasuta subgroup and revealed only 3 and 4 variable sites respectively, of which only one site was informative. The CoI gene, on the other hand, revealed 57 variable sites of which 25 sites were informative. All the three species of orbital sheen complex were included in a major cluster in the phylogenetic trees derived from mitochondrial gene sequence data consistent with the morphophenotypic classification. The CoI analysis placed two species of frontal sheen complex, D. n. nasuta and D. n. albomicans in two different clades and this is inconsistent with morphological classification. The molecular clock suggested that divergence between the kohkoa complex and the albomicans complex occurred 2.2 MYA, indicating recent evolution of the nasuta subgroup. The higher transition bias in the mitochondrial genes reported in the present study also suggested recent evolution of the nasuta subgroup.

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Karyotypic orthoselection in Drosophila

Cited by 31 publications

References 2 publications

Metaphase chromosome configuration of the immigrans species group of Drosophila.

Metaphase chromosome configuration of the immigrans species group of Drosophila.

Genomic introgression in laboratory evolved hybrid races, Cytorace 1 and Fissioncytorace-1 ofNasuta-albomicanscomplex (NAC) ofDrosophila(Insecta, Diptera) as revealed by RAPD and ISSR markers

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

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