Dosage compensation of the sex-linked enzyme phosphoglucomutase in the orthoptera

Hebbert, Darcy R

doi:10.1038/hdy.1984.93

Cited by 11 publications

(10 citation statements)

References 19 publications

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“…), where females have two X chromosomes and males one. Various orthopteran species have been shown to have sex-linkage at a Pgm locus (Hebbert 1984). Conservation of this X chromosome trait in Stenopelmatidae would explain the hemizygous nature of the male hybrid.…”

Section: Discussionmentioning

confidence: 99%

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Hybridisation of tree weta on Banks Peninsula, New Zealand, and colour polymorphism withinHemideina ricta(Orthoptera: Stenopelmatidae)

Morgan‐Richards

Townsend

1995

New Zealand Journal of Zoology

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The two species of tree weta on Banks Peninsula, New Zealand, Hemideina ricta and H. femorata, are genetically distinct though morphologically similar. Our allozyme data coincide with species identification based on numbers of stridulatory ridges. However, H. ricta appears to be polymorphic for the presence of black markings on hind femora and abdominal tergites. At one location on Banks Peninsula, weta were collected that were heterozygous at all 11 loci that differ between H. ricta and those of H. femorata. The numbers of stridulatory ridges on these two individuals fall between those characterising H. ricta and H. femorata. We conclude that these two weta are first generation hybrids, and that the detection of only Fl hybrids suggests that they are probably sterile. Sex-linkage of phosphoglucomutase is found to be conserved in this family.

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Section: Discussionmentioning

confidence: 99%

“…If hybrids do exist, then the direction of the cross can be established by use of sex-linked alleles. Eleven species of Orthoptera (representing both suborders Caelifera and Ensifera) have sex linkage of a phosphoglucomutase (Pgm) locus (Hebbert 1984). We used a stain to examine phosphoglucomutase in these weta.…”

Section: Introductionmentioning

confidence: 99%

Hybridisation of tree weta on Banks Peninsula, New Zealand, and colour polymorphism withinHemideina ricta(Orthoptera: Stenopelmatidae)

Morgan‐Richards

Townsend

1995

New Zealand Journal of Zoology

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“…Because PGM is a monomer, homozygous individuals can be recognized by a single band, whereas heterozygous individuals have a doublebanded phenotype. An initial screening of adults revealed that PGM is sex-linked in G. sigillatus, as it is in other Orthoptera (Hebbert 1984); males, because they are XO, exhibit only a single fast or slow band, whereas females (XX) can exhibit either one or two bands. Hence, only the paternity of female offspring could be resolved on the basis of this allozyme.…”

Section: Electrophoretic Determination Of Paternitymentioning

confidence: 99%

Female Control of Sperm Transfer and Intraspecific Variation in Sperm Precedence: Antecedents to the Evolution of a Courtship Food Gift

1996

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Abstract.-Manipulation of ejaculates is believed to be an important avenue of female choice throughout the animal kingdom, but evidence of its importance to sexual selection remains scarce. In crickets, such manipulation is manifest in the premature removal of the externally attached spermatophore, which may afford females an important means of postcopulatory mate choice. We tested the hypothesis that premature spermatophore removal contributes significantly to intraspecific variation in sperm precedence by (1) experimentally manipulating spermatophore attachment durations of competing male Gryllodes sigillatus and (2) employing protein electrophoresis to determine the paternity of doubly mated females. The relative spermatophore attachment durations of competing males had a significant influence on male paternity, but the pattern of sperm precedence deviated significantly from the predictions of an ideal lottery. Instead, paternity data and morphological evidence accorded best with a model of partial sperm displacement derived here. Our model is similar to a displacement model of Parker et al. in that sperm of the second male mixes instantaneously with that of the first throughout the displacement process, but the novel feature of our model is that the number of sperm displaced is only a fraction of the number of sperm transferred by the second male. Regardless of the underlying mechanism, female G. sigillatus can clearly alter the paternity of their offspring through their spermatophore-removal behavior, and employ such cryptic choice in favoring larger males and those providing larger courtship food gifts. We discuss how female control of sperm transfer and intraspecific variation in sperm precedence may be important precursors to the evolution of gift giving in insects.

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“…(Hebbert 1984). All individuals are homozygous for the common allozyme unless specified in the variants column.…”

Section: Methodsmentioning

confidence: 99%

Host–parasite genome relationships in Acridid grasshoppers. I. Variation in the isoenzymes of the Caledia captiva species complex and in the gut bacterium Enterobacter cloacae

Colgan¹

1987

Genome

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COLGAN, D. J. 1987. Host-parasite genome relationships in Acridid grasshoppers. I. Variation in the isoenzymes of the Caledia captiva species complex and in the gut bacterium Enterobacter cloacae. Genome, 29: 257-263. Isoenzymic variation was investigated in populations of the four recognized taxa of the Australian acridine Caledia captiva and in 110 isolates of the bacterium Enterobacter cloacae present in their guts. Four types of colony morphology, of which two were common, were discernible in these bacteria. All representatives of each type appeared to be very close to typical members of E. cloacae. The genetic diversity of the eight bacterial enzymes scored was very high, both overall and in respect of the two common morphological types. This diversity is consistent with selective neutrality and is too great to be explained by selective discrimination between genotypes. There was no compelling evidence for any interaction between the host and bacterial genotypes. The results thus argue against the possibility that the parasites are involved in a system of frequency dependent selection. There was also no evidence of an association of bacterial type with divergence between the taxa of the C . captiva complex. COLGAN, D. J. 1987. Host-parasite genome relationships in Acridid grasshoppers. I. Variation in the isoenzymes of the Caledia captiva species complex and in the gut bacterium Enterobacter cloacae. Genome, 29 : 257-263. Une investigation a kt6 entreprise sur la variation des isoenzymes dans les populations de quatre taxons reconnus de Caledia captiva, acridiens d'Australie, et chez 110 isolats de la bactkrie Enterobacter cloaceae prksente dans leurs intestins. Ces isolats ont prksentk quatre types morphologiques de colonies, dont deux ktaient frkquents. Les divers reprksentants de chaque type se sont tous avkrks tres pres des membres typiques de E. cloaceae. La diversitk gknktique des huit enzymes bactkriennes obtenues fut tres klevke, tant pour I'ensemble des types morphologiques que pour les deux types les plus frkquents. Cette diversit6 concorde avec la neutralitk sklective et elle est trop important pour n'etre expliquke que par la discrimination sklective entre les gknotypes. Aucune des interactions entre l'h6te et les gknotypes bactkriens ne s'est avkrke source d'kvidence contraignante. Ces rksultats vont donc a l'encontre de la possibilitk que les parasites soient impliquks dans un systeme de sklection bask sur la frkquence. I1 n'y a pas eu non plus d'kvidence relative a une association d'un type bactkrien avec une divergence entre les taxons du complexe de C . captiva.

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Dosage compensation of the sex-linked enzyme phosphoglucomutase in the orthoptera

Cited by 11 publications

References 19 publications

Hybridisation of tree weta on Banks Peninsula, New Zealand, and colour polymorphism withinHemideina ricta(Orthoptera: Stenopelmatidae)

Hybridisation of tree weta on Banks Peninsula, New Zealand, and colour polymorphism withinHemideina ricta(Orthoptera: Stenopelmatidae)

Female Control of Sperm Transfer and Intraspecific Variation in Sperm Precedence: Antecedents to the Evolution of a Courtship Food Gift

Host–parasite genome relationships in Acridid grasshoppers. I. Variation in the isoenzymes of the Caledia captiva species complex and in the gut bacterium Enterobacter cloacae

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