The effects of male genotype on some aspects of population dynamics in lozenge—Muller-5 system of Drosophila melanogaster

1980 ◽  
Vol 71 (4) ◽  
pp. 235-240
Author(s):  
SERGEY POLIVANOV ◽  
PAUL PECK ◽  
KAREN A. DORNAN-KENDIG
Keyword(s):  
Population Dynamics ◽  
Drosophila Melanogaster ◽  
Male Genotype

scholarly journals The distribution of transposable elements within and between chromosomes in a population of Drosophila melanogaster. I. Element frequencies and distribution

1992 ◽  
Vol 60 (2) ◽  
pp. 103-114 ◽  
Author(s):  
Brian Charlesworth ◽  
Angela Lapid ◽  
Darlene Canada
Keyword(s):  
Population Dynamics ◽  
Drosophila Melanogaster ◽  
Linkage Disequilibrium ◽  
Transposable Elements ◽  
Copy Number ◽  
Polytene Chromosomes ◽  
Chromosome Band ◽  
High Frequencies ◽  
Copy Numbers

SummaryData were collected on the distribution of nine families of transposable elements among second and third chromosomes isolated from a natural population of Drosophila melanogaster, by means of in situ hybridization of element probes to polytene chromosomes. It was found that the copy numbers per chromosome in the distal sections of the chromosome arms followed a Poisson distribution. Elements appeared to be distributed randomly along the distal sections of the chromosome arms. There was no evidence for linkage disequilibrium in the distal sections of the chromosomes, but some significant disequilibrium was detected in proximal regions. There were many significant correlations between different element families with respect to the identity of the sites that were occupied in the sample. There were also significant correlations between families with respect to sites at which elements achieved relatively high frequencies. Element frequencies per chromosome band were generally low in the distal sections, but were higher proximally. These results are discussed in the light of models of the population dynamics of transposable elements. It is concluded that they provide strong evidence for the operation of a force or forces opposing transpositional increase in copy number. The data suggest that the rate of transposition perelement per generation is of the order of 10−4, for the elements included in this study.

scholarly journals Roles of Female and Male Genotype in Post-Mating Responses in Drosophila melanogaster

2017 ◽  
Vol 108 (7) ◽  
pp. 740-753 ◽  
Author(s):  
Sofie Y N Delbare ◽  
Clement Y Chow ◽  
Mariana F Wolfner ◽  
Andrew G Clark
Keyword(s):  
Drosophila Melanogaster ◽  
Male Genotype

scholarly journals IDENTIFICATION OF BRAIN SITES CONTROLLING FEMALE RECEPTIVITY IN MOSAICS OF DROSOPHILA MELANOGASTER

Genetics ◽  
1983 ◽  
Vol 103 (2) ◽  
pp. 179-195
Author(s):  
Laurie Tompkins ◽  
Jeffrey C Hall
Keyword(s):  
Drosophila Melanogaster ◽  
Minimum Amount ◽  
Male Courtship ◽  
Experimental Conditions ◽  
Female Receptivity ◽  
Female Genotype ◽  
Courtship Behaviors ◽  
Necessary And Sufficient ◽  
The Brain ◽  
Male Genotype

ABSTRACT We have identified cells in the brain of Drosophila melanogaster that are required to be of female genotype for receptivity to copulation with males. To do this, we determined experimental conditions in which female flies virtually always copulate, then measured the minimum amount of male courtship that is required to stimulate females to indicate their receptivity to copulation. We then observed gynandromorphs with female genitalia to determine whether the sex mosaics elicited at least the minimum amount of courtship and, if so, whether they copulated. By analyzing these gynandromorphs, in which the genotype of external and internal tissues could be ascertained, we were able to identify a group of cells in the dorsal anterior brain that, when bilaterally female, is necessary and sufficient for receptivity to copulation. This group of cells is anatomically distinct from those that are required to be of male genotype for the performance of courtship behaviors.

scholarly journals POPULATION DYNAMICS OF THE SEGREGATION DISTORTER POLYMORPHISM OF DROSOPHILA MELANOGASTER

Genetics ◽  
1978 ◽  
Vol 89 (1) ◽  
pp. 171-192 ◽  
Author(s):  
Brian Charlesworth ◽  
Daniel L Hartl
Keyword(s):  
Population Genetics ◽  
Population Dynamics ◽  
Drosophila Melanogaster ◽  
The Other ◽  
The Core ◽  
Segregation Distorter ◽  
Tight Linkage ◽  
Highly Oscillatory ◽  
Approximate Treatment ◽  
Special Case

ABSTRACT Two two-locus models of the population dynamics of the segregation distortion (SD) polymorphism of Drosophila melanogaster are described. One model is appropriate for understanding the population genetics of SD in nature, whereas the other is a special case appropriate for understanding an artificial population that has been extensively analysed. The models incorporate the general features of the Sd and Rsp loci which form the core of the SD system. It is shown that the SD polymorphism can be established only when there is sufficiently tight linkage between Sd and Rsp. An approximate treatment, valid for tight linkage, is given of all the equilibria of the system and their stabilities. It is shown that the observed composition of natural and artificial populations with respect to the Sd and Rsp loci is predicted well by the model, provided that restrictions are imposed on the fertilities of certain genotypes. Highly oscillatory paths towards equilibrium are usually to be expected on the basis of this model. The selection pressures on inversions introduced into this system are also investigated.

scholarly journals Expression and amplification of the genes for ribosomal RNA in bobbed mutants of Drosophila melanogaster

1985 ◽  
Vol 45 (2) ◽  
pp. 155-165 ◽  
Author(s):  
F. Lee Dutton ◽  
Hallie M. Krider
Keyword(s):  
Drosophila Melanogaster ◽  
Sexual Dimorphism ◽  
Ribosomal Rna ◽  
Dosage Compensation ◽  
Rrna Genes ◽  
Rdna Genes ◽  
Diploid Genome ◽  
Minimum Dose ◽  
Phenotypic Character ◽  
Male Genotype

SummaryWe have employed stocks bearing clonally derived X chromosomes to investigate several features of the bobbed mutant syndrome, and the amplification of rDNA genes in D. melanogaster. We report that posterior macroscutellar bristle length correlates well with the rDNA content (i.e. dose of ivs–, or uninterrupted genes) in cloned X derivative strains. X/O males and X/X females with statistically indistinguishable rDNA contents have virtually identical bristle lengths. This indicates that (with respect to this phenotypic character) the rDNAs in these two genotypes are expressed equally, without apparent sexual dimorphism or dosage compensation. However, the severity of bobbed phenotype in terms of bristle morphology, turgite etching, and delayed eclosion is greater in the Xbb/XNO− female than in the Xbb/O male genotype for the alleles examined. We estimate the minimum dose of functioning rRNA genes required for viability at 26 δC to be 70 genes per diploid genome. We have examined the capacity of several X chromosomes which bear bobbed mutant alleles to compensate in X/O males, and find that disproportionate replication of these rDNAs does not take place. In contrast, at least one of the non-compensating bobbed alleles does appear to undergo rDNA magnification.

scholarly journals A TWO YEARS' SURVEY OF POPULATION DYNAMICS IN DROSOPHILA MELANOGASTER

Evolution ◽  
1955 ◽  
Vol 9 (4) ◽  
pp. 353-366 ◽  
Author(s):  
E. Goldschmidt ◽  
J. Wahrman ◽  
A. Ledermann-Klein ◽  
R. Weiss
Keyword(s):  
Population Dynamics ◽  
Drosophila Melanogaster

scholarly journals MALE GENOTYPE AFFECTS FEMALE LONGEVITY IN DROSOPHILA MELANOGASTER

Evolution ◽  
2007 ◽  
Vol 55 (4) ◽  
pp. 834-839
Author(s):  
Ryan Sawby ◽  
Kimberly A. Hughes
Keyword(s):  
Drosophila Melanogaster ◽  
Female Longevity ◽  
Male Genotype

scholarly journals Male genotype influences female reproductive investment in Drosophila melanogaster

2010 ◽  
Vol 278 (1715) ◽  
pp. 2165-2172 ◽  
Author(s):  
Alison Pischedda ◽  
Andrew D. Stewart ◽  
Monica K. Little ◽  
William R. Rice
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Variation ◽  
Egg Size ◽  
Direct Evidence ◽  
Reproductive Investment ◽  
Male Quality ◽  
Isofemale Lines ◽  
Female Fecundity ◽  
Short Term ◽  
Male Genotype

In many species, males can influence the amount of resources their mates invest in reproduction. Two favoured hypotheses for this observation are that females assess male quality during courtship or copulation and alter their investment in offspring accordingly, or that males manipulate females to invest heavily in offspring produced soon after mating. Here, we examined whether there is genetic variation for males to influence female short-term reproductive investment in Drosophila melanogaster , a species with strong sexual selection and substantial sexual conflict. We measured the fecundity and egg size of females mated to males from multiple isofemale lines collected from populations around the globe. Although these traits were not strongly influenced by the male's population of origin, we found that 22 per cent of the variation in female short-term reproductive investment was attributable to the genotype of her mate. This is the first direct evidence that male D. melanogaster vary genetically in their proximate influence on female fecundity, egg size and overall reproductive investment.

Sign in / Sign up

Export Citation Format

Share Document