Deletion analysis of the selfish B chromosome, paternal sex ratio (PSR), in the parasitic wasp Nasonia vitripennis

Article Abstract:

Deletion analysis of the paternal sex ratio (PSR) supernumerary or B chromosome in the parasitoid wasp Nasonia vitripennis was done to determine whether nonfunctional PSR may be generated, to characterize the repeats on the chromosome and to identify possible functional domains. Deletion profiles showed that most repeats are organized in blocks on the chromosome and that functional domains of PSR can be deleted resulting in nonfunctional PSR that are transmitted to daughters. Nonfunctional deletion chromosomes were generated and transmitted highly through haploid males.

Chromosome deletion, Sex chromosomes

---

The infinite island model with sex-differentiated gene flow

Article Abstract:

The infinite island model has been studied with sex-differentiated gene flow. Identity measures have been derived. The expected difference in genetic differentiation of autosomal vs X-linked loci shows that sex-differentiated migration is possible and may help resolve questions. A difference between effective gene flow and the number of migrants adds to a possible disagreement between direct and indirect dispersal estimates.

Models, Population genetics, Sex-linkage (Genetics), Sex linkage, Sex differentiation

---

Absence of single-locus complementary sex determination in the broconid wasps Asobara tabida and Alysia manducator

Article Abstract:

Lack of single-locus complementary sex determination in Asobara tabida and Alysia manducator, braconid wasps, has been studied. It was concluded that sl-CSD is not present in the species. This is the first study that shows the lack of sl-CSD in species of the Braconidae family. That hymenoptera sex-determining mechanisms can differ within a family. has also been shown.

Netherlands, Sex, Sexual behavior, Hymenoptera, Complementation (Genetics), Testis-determining factor

Similar abstracts:

• Abstracts: Photometric application of the Gram stain method to characterize natural bacterial populations in aquatic environments
• Abstracts: Estimation of fungal infection of peanut kernels by determination of free glutamic acid content. Endo-xylogalacturonan hydrolase, a novel pectinolytic enzyme
• Abstracts: Numerical analysis of the proximal humeral outline: bilateral shape differences. Variability in humeral dimensions in a sample of modern human females: implications for measuring cortical bone loss
• Abstracts: Power of a chromosomal test to detect genetic variation using genetic markers. A multivariate approach to the problem of QTL localization
• Abstracts: Quantitative genetics of preference and performance on chickpeas in the noctuid moth, Helicoverpa armigera. Reduction in fitness of flea beetles which are homozygous for an autosomal gene conferring resistance to defences in Barbarea vulgaris

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.