Using eggshell membranes as a DNA source for population genetic research

In the context of population genetic research, a faster and less invasive method of DNA sampling would allow large-scale assessments of genetic diversity and genetic differentiation with the help of volunteer observers. The aim of this study was to investigate the usefulness of eggshell membranes as a DNA source for population genetic research, by addressing eggshell membrane DNA quality, degeneration and cross-contamination. To this end, a comparison was made with blood-derived DNA samples. We have demonstrated 100% successful DNA extraction from post-hatched Black-tailed Godwit (Limosa limosa) eggshell membranes as well as from blood samples. Using 11 microsatellite loci, DNA amplification success was 99.1% for eggshell membranes and 97.7% for blood samples. Genetic information within eggshell membrane DNA in comparison to blood DNA was not affected (F-ST = -0.01735, P = 0.999) by degeneration or possible cross-contamination. Furthermore, neither degeneration nor cross-contamination was apparent in total genotypic comparison of eggshell membrane DNA and blood sample DNA. Our research clearly illustrates that eggshell membranes can be used for population genetic research

Renovatie Praktijkcentrum Sterksel: de vleesvarkensunit

In 2001 wordt deze unit met name ingezet voor het onderzoek naar 60% dichte vloer bij vleesvarkens. In dit artikel volgt een uitgebreidere beschrijving van de nieuwe vleesvarkensunit, die in 2000 gebouwd is

Evaluatie vennootschapsbelasting

Een lagere effectieve druk op ondernemingen is in Nederland niet noodzakelijk, maar een lager tarief van de vennootschapsbelasting is wél wenselijk