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Recently, Bai Ming's research group of Institute of Zoology, Chinese Academy of Sciences, Zhang Guojie's team of Zhejiang University, together with Shenzhen BGI Life Sciences Research Institute, Kunming Institute of Zoology, Chinese Academy of Sciences, University of Copenhagen and other research groups at home and abroad, announced the species of marsupial mammals.
As early as the 19th century, Darwin proposed in his masterpiece "The Origin of Species" that all species now on earth originally evolved from the same primitive life, that is, the common ancestor theory
DNA is the genetic blueprint of most organisms.
Molecular trees and contradictions with morphological trees often occur in taxa that have experienced rapid species differentiation
To study the impact of incomplete lineage sorting on the evolution of species morphology and traits, the research team used marsupials to conduct research
These conflicting genomic regions contain hundreds of genes related to the nervous system, immune system, bone morphology, etc.
The evolution of species traits is considered to be the result of long-term adaptation of species to the environment: mutations generate new genes and new traits, new genes are spread through reproduction, and traits and genes that are beneficial to survival and reproduction will be retained by natural selection
Furthermore, in recent years, advances in sequencing technologies have brought genomics research into a new era of perfect reference genomes
The result has been published online on April 20, 2022 in a paper titled "Incomplete lineage sorting and phenotypic evolution in marsupials" in the top international academic journal "Cell".
Article link:
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Legend: Schematic diagram of incomplete pedigree sorting (two dots in each group represent an individual, and each dot represents a gene) (drawn by Feng Shaohong et al.
