According to Darwin’s theory of evolution, living things are constantly evolving during a long historical development process. Natural selection, survival of the fittest, evolution comes from natural selection on the one hand, and genetic mutation on the other, which creates the diversity of species. The genes of different species are not the same, so it is difficult to carry out gene exchanges, which means that hybridization is not possible. However, in modern times, there are people who want to break through this conventional theory, and even complete hybridization experiments that people cannot believe , And create creatures that shouldn’t exist.
Over 184 million years of hybridization, scientists broke conventions and created organisms that shouldn’t exist
In the journal “Gene”, a scientist in Hungary published such a paper, that is, the successful hybridization of two endangered fish species from the United States and Russia to create a new type of fish species. And he said that this creation has also brought good news to mankind. The fish produced by this hybridization has become a source of high-yield caviar. So what kind of relationship and origin do these two fishes have? Why can successful hybridization create such a new type of species? This hybrid experiment can be said to have broken people’s conventional cognition.
It is understood that in the basin of the Mississippi River, there is a freshwater fish named American Keystomach. The weight of this fish can reach more than 100 kilograms, and there is a sensor on its body that can play a role in navigation. It is convenient to migrate or eat, and this kind of fish is now facing the crisis of extinction.
In addition, there is also a kind of fish called diamond sturgeon in Russia. It is also known as the Danube sturgeon. It is mainly distributed in Eastern Europe and Russia. It can weigh up to 115 kg. It is a migratory fish. Species, often upstream in the sea, only when they reach the upper reaches to spawn. Nowadays, due to the continuous expansion of the scope of human activities, their living environment has been destroyed, and the number of this kind of fish has also fallen sharply. In addition, its caviar is very high-grade, so it is also caught in a large amount for this reason, and nowadays it is very small.
Faced with such a situation, Hungarian fishery researchers conducted research. After comparing the genes of these two fishes, they found that they had a common ancestor in ancient times, that is, in the Jurassic period. At that time, their ancestors were the same. The two fishes began to differentiate 184 million years ago and evolved into what they are today, living in different watersheds. Therefore, the researchers made a bold experiment to hybridize the two fishes, and then fuse the germ cells of the two. It was unexpectedly discovered that the scorpion sturgeon can fuse with the egg cells of the diamond sturgeon, and also produced a new type of sturgeon. Fish. Among their offspring, fry with the characteristics of these two types of fish account for about half of each.
Such a new discovery makes scientists very excited. In this way, a large number of offspring of hybrid fish can be obtained, and a very high yield of caviar can be produced, which is undoubtedly a kind of luck for people. And some people think that the study of the Hungarian fisheries can be said to be out of luck. It just so happens that this experiment is successful, so that they can get such a big benefit. In fact, there have been countless hybrid experiments between different species like this in history. For example, people produced mules after mating horses and donkeys, but the offspring produced were infertile, so this hybrid experiment It was really lucky.
This hybridization spanning 184 million years has created such a new species that can benefit mankind. Still very good. But it is important to know that species cannot be crossed easily. Otherwise, if more unknown species are produced, it may be a disaster for humans.
