For this little research I investigated the wings of 60 worker bees of a colony from which all the worker bees have a typical mellifera-morphology (see photo, however the photo is made with a smartphone so the quality is not of the best). The queen is a fresh one of this year (mated in the third week of May) and is a daughter of the queen from which Kai investigated a sample last year (http://www.nordbiene.de/dunkle…lgien-chimay-probe-1.html). The results of the investigation:
Cubitalindex: 10 of the 60 wings (which is approximately 17%) have a CI > 1.90; the maximumvalue is 2.00, this value is reached 3 times.
Discoidalshift: all wings have a negative discoidalshift.
Hantalindex: 12 of the 60 wings (which is 20%) have a HI > 0.925; the maximumvalue is 0.949, this value is reached 2 times.
In general, the population of the Belgian Dark Honeybee is a bit hybridized: according to genetic research carried out by Lionel Garnery of the French National Institute for Scientific Research the population is hybridised for 14% on the level of mitochondrial DNA and for 6% on the level of nuclear DNA. However, that does not mean that all colonies of that population are hybridized by definition. I believe that with the right breeding strategy it is possible to preserve the Belgian heritage of our Dark Honeybee and looking at the given results, I think my colleagues and me are on the right track
The last photo is taken yesterday when I had some Dutch beekeepers on visit, they were pleasantly surprised by the gentleness of the Belgian A.m.m.
Herzliche Grüße,
Dylan
[attachment=0]datenblatt-fluegeluntersuchungen.jpg[/attachment]
[attachment=1]Belgische Dunkle Biene.JPG[/attachment]
[attachment=2]Cubitalindex and discoidalshift.JPG[/attachment]
[attachment=3]Correlation Hantalindex - Discoidalshift.JPG[/attachment]
[attachment=4]Zeelanders.JPG[/attachment]