The evolution of polyandry by queens in social Hymenoptera: the significance of the timing of removal of diploid males

1990 ◽  
Vol 26 (5) ◽  
Author(s):  
FrancisL.W. Ratnieks
Keyword(s):  
Diploid Males ◽  
Social Hymenoptera ◽  
Evolution Of Polyandry

Facultative Sex Allocation by Workers and the Evolution of Polyandry by Queens in Social Hymenoptera

1995 ◽  
Vol 145 (6) ◽  
pp. 969-993 ◽  
Author(s):  
Jacobus J. Boomsma
Keyword(s):  
Sex Allocation ◽  
Social Hymenoptera ◽  
Evolution Of Polyandry

Chromosome pairing in female and male diploid and polyploid anurans (Amphibia) from South America

1983 ◽  
Vol 25 (5) ◽  
pp. 487-494
Author(s):  
I. M. Rahn ◽  
A. Martinez
Keyword(s):  
South America ◽  
Genetic Control ◽  
Chromosome Pairing ◽  
Diploid Males ◽  
Terminal Chiasmata

Chromosome pairing in females and males of diploid (2n = 22) and tetraploid (2n = 44) Odontophrynus americanus and diploid Ceratophrys cranwelli (2n = 26) and tetraploid C. ornata (2n = 104) showed that diploid females formed more chiasmata per paired arm than diploid males and polyploids of both sexes. There was a reduction in the level of recombination in female polyploids by forming multivalents with terminal chiasmata. The reduction reflected a change in the genetic control of pairing in females after polyploidization.

scholarly journals REPRODUCTIVE SKEW AND SPLIT SEX RATIOS IN SOCIAL HYMENOPTERA

Evolution ◽  
2001 ◽  
Vol 55 (10) ◽  
pp. 2131-2136 ◽  
Author(s):  
Andrew F. G. Bourke
Keyword(s):  
Sex Ratios ◽  
Reproductive Skew ◽  
Social Hymenoptera

On the Robustness of Split Sex Ratio Predictions In Social Hymenoptera

1997 ◽  
Vol 185 (4) ◽  
pp. 423-439 ◽  
Author(s):  
Francis L.W. Ratnieks ◽  
Jacobus J. Boomsma
Keyword(s):  
Sex Ratio ◽  
Social Hymenoptera

Diploid males and colony-level selection inFormicaants

1994 ◽  
Vol 6 (2) ◽  
pp. 221-235 ◽  
Author(s):  
P. Pamilo ◽  
L. Sundström ◽  
W. Fortelius ◽  
R. Rosengren
Keyword(s):  
Diploid Males ◽  
Colony Level

scholarly journals Patterns of split sex ratio in ants have multiple evolutionary causes based on different within-colony conflicts

2009 ◽  
Vol 5 (5) ◽  
pp. 713-716 ◽  
Author(s):  
Rolf Kümmerli ◽  
Laurent Keller
Keyword(s):  
Sex Ratio ◽  
Sex Allocation ◽  
Social Hymenoptera ◽  
Kin Structure ◽  
Widespread Phenomenon ◽  
Queen Production

Split sex ratio—a pattern where colonies within a population specialize in either male or queen production—is a widespread phenomenon in ants and other social Hymenoptera. It has often been attributed to variation in colony kin structure, which affects the degree of queen–worker conflict over optimal sex allocation. However, recent findings suggest that split sex ratio is a more diverse phenomenon, which can evolve for multiple reasons. Here, we provide an overview of the main conditions favouring split sex ratio. We show that each split sex-ratio type arises due to a different combination of factors determining colony kin structure, queen or worker control over sex ratio and the type of conflict between colony members.

Linkage Analysis of Sex Determination in Bracon sp. Near hebetor (Hymenoptera: Braconidae)

Genetics ◽  
2000 ◽  
Vol 154 (1) ◽  
pp. 205-212
Author(s):  
Alisha K Holloway ◽  
Michael R Strand ◽  
William C Black ◽  
Michael F Antolin
Keyword(s):  
Linkage Group ◽  
Sex Determination ◽  
Rapd Markers ◽  
Random Amplified Polymorphic Dna ◽  
Parasitic Wasp ◽  
Specific Pattern ◽  
Diploid Males ◽  
Phenotypic Marker ◽  
Group I ◽  
Sex Locus

Abstract To test whether sex determination in the parasitic wasp Bracon sp. near hebetor (Hymenoptera: Braconidae) is based upon a single locus or multiple loci, a linkage map was constructed using random amplified polymorphic DNA (RAPD) markers. The map includes 71 RAPD markers and one phenotypic marker, blonde. Sex was scored in a manner consistent with segregation of a single “sex locus” under complementary sex determination (CSD), which is common in haplodiploid Hymenoptera. Under haplodiploidy, males arise from unfertilized haploid eggs and females develop from fertilized diploid eggs. With CSD, females are heterozygous at the sex locus; diploids that are homozygous at the sex locus become diploid males, which are usually inviable or sterile. Ten linkage groups were formed at a minimum LOD of 3.0, with one small linkage group that included the sex locus. To locate other putative quantitative trait loci (QTL) for sex determination, sex was also treated as a binary threshold character. Several QTL were found after conducting permutation tests on the data, including one on linkage group I that corresponds to the major sex locus. One other QTL of smaller effect had a segregation pattern opposite to that expected under CSD, while another putative QTL showed a female-specific pattern consistent with either a sex-differentiating gene or a sex-specific deleterious mutation. Comparisons are made between this study and the indepth studies on sex determination and sex differentiation in the closely related B. hebetor.

Adaptations in the Olfactory System of Social Hymenoptera

2009 ◽  
pp. 195-219
Author(s):  
CHRISTOPH J. KLEINEIDAM ◽  
WOLFGANG RÖSSLER
Keyword(s):  
Olfactory System ◽  
Social Hymenoptera

scholarly journals Queen Execution, Diploid Males, and Selection For and Against Polyandry in the Brazilian Stingless Bee Scaptotrigona depilis

2019 ◽  
Vol 194 (5) ◽  
pp. 725-735
Author(s):  
Ayrton Vollet-Neto ◽  
Vera L. Imperatriz-Fonseca ◽  
Francis L. W. Ratnieks
Keyword(s):  
Stingless Bee ◽  
Diploid Males ◽  
Selection For
Sign in / Sign up

Export Citation Format

Share Document