STUDIES ON PUFFING IN THE SALIVARY GLAND CHROMOSOMES OF &lt;i&gt;DROSOPHILA ANANASSAE&lt;/i&gt;

Moriwaki, Daigoro; Ito, Sachiko

doi:10.1266/jjg.44.129

Cited by 15 publications

(7 citation statements)

References 17 publications

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“…This map was utilized by Futch (1966) to describe a variety of chromosome rearrangements found in South Pacific island populations. Subsequently, Moriwaki and Ito (1969) composed photomaps that were used to describe the puffing patterns and Hinton and Downs (1975) produced a new ideogram map for use in their cytogenetic analyses. More recently, we have prepared revised photographic maps , which are based on those of Moriwaki and Ito (1969) to aid in the determination of inversion breakpoints.…”

Section: Ananassae Mapsmentioning

confidence: 99%

“…Subsequently, Moriwaki and Ito (1969) composed photomaps that were used to describe the puffing patterns and Hinton and Downs (1975) produced a new ideogram map for use in their cytogenetic analyses. More recently, we have prepared revised photographic maps , which are based on those of Moriwaki and Ito (1969) to aid in the determination of inversion breakpoints. In these maps, the chromosomes are divided into 100 numerical sections, and each of these is further subdivided into subsections denoted by the letters A, B, C, and D. Section numbering is started from the distal end of XL to the distal end of 3R: XL (1-13), XR (14-20), 2L (21-44), 2R (45-63), 3L (64-81), and 3R (82-99).…”

Section: Ananassae Mapsmentioning

confidence: 99%

“…Chromosome maps-D. ananassae: The D. ananassae strain AABBg1 was used for genomic sequencing instead of the strain used to develop the polytene map (Moriwaki and Ito 1969;Tobari et al 1993). The AABBg1 strain was used because it was the most highly inbred strain available at the time that genome sequencing began.…”

Section: Ananassae Mapsmentioning

confidence: 99%

“…The AABBg1 strain was used because it was the most highly inbred strain available at the time that genome sequencing began. The polytene chromosome map strain (Moriwaki and Ito 1969;Tobari et al 1993) has been used extensively to develop the D. ananassae physical map genes using in situ hybridization. The karyotypes of the polytene map strain and AABBg1 have the same standard arrangement on all chromosomes except for Muller C (chromosome 3L), where the polytene strain has the standard arrangement and AABBg1 has the terminal inversion In(3L)A with breakpoints at 75B and 81A.…”

Section: Ananassae Mapsmentioning

confidence: 99%

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Polytene Chromosomal Maps of 11 Drosophila Species: The Order of Genomic Scaffolds Inferred From Genetic and Physical Maps

et al. 2008

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The sequencing of the 12 genomes of members of the genus Drosophila was taken as an opportunity to reevaluate the genetic and physical maps for 11 of the species, in part to aid in the mapping of assembled scaffolds. Here, we present an overview of the importance of cytogenetic maps to Drosophila biology and to the concepts of chromosomal evolution. Physical and genetic markers were used to anchor the genome assembly scaffolds to the polytene chromosomal maps for each species. In addition, a computational approach was used to anchor smaller scaffolds on the basis of the analysis of syntenic blocks. We present the chromosomal map data from each of the 11 sequenced non-Drosophila melanogaster species as a series of sections. Each section reviews the history of the polytene chromosome maps for each species, presents the new polytene chromosome maps, and anchors the genomic scaffolds to the cytological maps using genetic and physical markers. The mapping data agree with Muller's idea that the majority of Drosophila genes are syntenic. Despite the conservation of genes within homologous chromosome arms across species, the karyotypes of these species have changed through the fusion of chromosomal arms followed by subsequent rearrangement events. O NE of the primary strengths of the genus Drosophila as a model system has been the relative ease of generating detailed cytogenetic maps. Indeed, the first definitive mapping of genes to chromosomes Genetics 179: 1601-1655 ( July 2008) was performed in Drosophila melanogaster (Bridges 1916). The subsequent discovery of polytene chromosomes in the salivary glands in this same species (Painter 1934) and their codification into fine-structure genetic/ cytogenetic maps represents perhaps one of the first forays into ''genomics.'' Polytene maps (Bridges 1935;Lefevre 1976) provided an important genetic tool for mapping genes, for detecting genetic diversity within populations, and for inferring phylogenies among related species (Dobzhansky and Sturtevant 1938;Judd et al. 1972;Ashburner and Lemeunier 1976;Lemeunier and Ashburner 1976). Sturtevant and Tan (1937) laid the groundwork for comparative genomics when they established that genes within the chromosomal arms are conserved or syntenic among species. In an insightful melding of the gene mapping and evolutionary studies, H. J. Muller (1940) proposed that the genomes of Drosophila species were subdivided into a set of homologous elements represented by chromosome arms. What Muller (1940) noted, which was subsequently elaborated on by Sturtevant and Novitski (1941), was that the presumed homologs of identified mutant alleles within a chromosome arm of D. melanogaster were also confined to a single arm in other species within the genus where mapping data were available. Using D. melanogaster as a reference, Muller proposed that each of the five major chromosome arms plus the dot chromosome be given a letter designation (A-F) and that this nomenclature be used to identify equivalent linkage groups within the genus.The an...

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Section: Ananassae Mapsmentioning

confidence: 99%

Section: Ananassae Mapsmentioning

confidence: 99%

Section: Ananassae Mapsmentioning

confidence: 99%

Section: Ananassae Mapsmentioning

confidence: 99%

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Polytene Chromosomal Maps of 11 Drosophila Species: The Order of Genomic Scaffolds Inferred From Genetic and Physical Maps

et al. 2008

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“…It has generally been assumed 1) that the genetic differences at the level of individual loci among strains of the same species and between related species do not affect puffing activity (Ashburner, 1969a(Ashburner, , 1969b and 2) that chromosomal aberrations do not affect puffing activity either (Moriwaki and Ito, 1969;Ashburner, 1972; Ashburner and 1298 showing a clear puff morphology were considered.…”

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confidence: 99%

PATTERNS OF PUFFING ACTIVITY AND CHROMOSOMAL POLYMORPHISM IN DROSOPHILA SUBOBSCURA . IV. EFFECT OF INVERSIONS ON GENE EXPRESSION

1988

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We have observed that, contrary to a common assumption, the puffing patterns manifest in the salivary chromosomes of Drosophila subobscura are modified by chromosomal inversions as well as by genic content. An inversion effect is apparent in the E and A chromosomes of five strains coming from four different natural populations. An effect due to the geographical location of the populations is also detected in the J and O chromosomes. The chromosomal and geographic effects are distinguishable but not contradictory. Indeed, a statistical test using the DK2 coefficient of distance shows that, for a given chromosomal arrangement, strains of different geographic origin exhibit puffing patterns significantly different; these patterns are, however, more similar to each other than they are to those of strains carrying different chromosomal arrangements of the same chromosome.

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Drosophila ananassae

Moriwaki¹,

Tobari²

1975

Invertebrates of Genetic Interest

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STUDIES ON PUFFING IN THE SALIVARY GLAND CHROMOSOMES OF <i>DROSOPHILA ANANASSAE</i>

Cited by 15 publications

References 17 publications

Polytene Chromosomal Maps of 11 Drosophila Species: The Order of Genomic Scaffolds Inferred From Genetic and Physical Maps

Polytene Chromosomal Maps of 11 Drosophila Species: The Order of Genomic Scaffolds Inferred From Genetic and Physical Maps

PATTERNS OF PUFFING ACTIVITY AND CHROMOSOMAL POLYMORPHISM IN DROSOPHILA SUBOBSCURA . IV. EFFECT OF INVERSIONS ON GENE EXPRESSION

Drosophila ananassae

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