基因组测序 z-bo 2020-08-19 418

　　The international international research team has completed the cent genome sequencing

　　Ancient genes have important research value

　　Science and Technology News News International Research Group recently announced the completion of the first cent genome sequence. In this study, the genome is 1/10 the size of the human genome and contains 15,000 genes, which is only two-thirds of the human genome. 106 researchers from 12 countries participated in the project. Related papers are published online in the "Public Library of Science? Biology Volume". Arthropods are a very interesting subject in scientific research because they distinguish most species from other animals to adapt to the environment, and they are the most diverse species in the animal kingdom. It has been used by humans under the phylum Arthropod. It is named after more than 750,000 species of insects. Dr. Eril Chipman of the Hebrew University of Israel, who participated in the study, said that arthropods have been around for more than 500 million years, and the early evolution of different groups and species is difficult. ..speak clearly. The gene sequence is much simpler than the human genome sequence, but it is not always the original original genome, but compared with other arthropods, the retained genome is preserved. Older. Fossil evidence indicates that podropods are one of the first three arthropods from the ocean to the mainland, and the other two are insects and spiders. Therefore, they need to find a way to sniff the chemicals in the air instead of tasting them from the water. A network organized by physicists reported on November 26 that the team found that insects have more taste receptor genes than smell than polyps, but polyps are more primitive. Target Chipman said that this is an example of parallel evolution of different species, using different methods to solve the same problem.

　　This particular group lost sight during evolution about 200 million years ago, so no genes related to sight were found in the genome of the genome. Since cent lives underground, it is not surprising that he lacks photosensitive genes, but he seems afraid of sunlight. Scientists speculate that other methods of detecting light are needed.

　　Very strange, this guy does not seem to have the same genes that control the human body's clock, or is very different from other animals. Scientists believe that this may be related to the fact that the biological clock also relies on light input to determine day and night. Manman said that enti genome sequencing is not only used for research purposes, but some of its genes have important research value. All cents paralyze their prey by injecting venom, which is usually a potent drug. Researchers hope to help discover these toxic genes by studying the cent genome.