The ancestors of fungi and animals diverged very slowly in the course of evolution. Article about it published in nature.
550 million years ago, the Cambrian explosion occurred, in which all kinds of animals and kingdoms were formed, and shortly before that, the first multicellular organisms appeared.
Denis Tikhonenkov of the Institute of Inland Waters Biology of the Russian Academy of Sciences in Borok and his colleagues sequenced the genomes of more than 80 species of animals and fungi, to find out exactly how the evolution of the first multicellular animals went. total creatures. Experts compared their genomes and identified the pieces of DNA that changed the most or least during the evolution of animals and fungi. Next, geneticists compared the clusters of mutations in the genes of representatives of each kingdom; this helped them find the genes that changed the most during the independent evolution of fungi and animals.
As a result, it turned out that the ancestors of fungi and animals followed different trajectories of evolutionary development, and this movement began long before the first representatives of both living kingdoms appeared. In general, as animals moved towards increased mobility and the development of new cell types, fungi, on the contrary, gradually lost the genes associated with these features of the first eukaryotes, living things with a separate nucleus.
This refutes previous scientific theories, according to which the main stages of the evolution of multicellular organisms took place in the form of short and sharp jerks. Now, to get a more detailed picture of the evolution of life during this period, scientists plan to add amoebae to their analysis.
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Source: Gazeta
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