The "BauernZeitung" reports on genome editing in animal breeding. Researchers in Great Britain have succeeded in breeding mice either exclusively male or exclusively female. With the CRISPR/Cas gene scissors, they were able to deactivate a gene so that female or male embryos stop growing at a very early stage of development. In the future, the findings could also be used in the breeding of farm animals - for example in the breeding of laying hens. It is currently common practice to kill male chicks because they do not become laying hens. With the help of genetic scissors, chick-killing could soon be a thing of the past, as the sex of the chicks can be determined in advance. But it will take several years of intensive research before the process is ready for approval.

Dual-purpose chickens: More feed, less yield

At its assembly of delegates, Bio Suisse spoke out in favor of a ban on the killing of chicks as of 2026. At the same time, the so-called in-ovo technology for sex determination was also banned. The technology can be used to determine the sex of the chick in the hatching egg. In male embryos, incubation of the egg can then be stopped. With this decision, Bio Suisse is focusing on the dual-purpose chicken. Females become laying hens, the meat of males can be used. In terms of sustainability, however, the dual-purpose chicken fares poorly. Laying hens lay fewer eggs and the roosters put on less meat than modern broilers. In addition, dual-purpose chickens need more feed than high-performance chickens. The productivity of the chickens decreases when there is a greater need for feed.

Genome editing would actually be the ideal solution for Bio Suisse. Both the chick-killing and the sustainability problems of the dual-purpose chickens could thus be prevented. Treatment with genetically modified vaccines could also prevent animal suffering. But Bio Suisse firmly rejects genetic engineering. To the detriment of sustainability.