Xcode life ancestry8/8/2023 ![]() ![]() Take mules, for instance, which are a hybrid between horses and donkeys: Male mules are effectively sterile, although female mules can mate with either parent species. Polyploidy is unknown in mammals, although hybridization is still possible. In the case of goldfish, the authors prove for the first time that they share the same duplicated gene sequences as common carp, and thus a common hybrid ancestor. The process of polyploidization is more involved with animal species, although it does happen in some fish and amphibians. Polyploidization - the duplication of genomes in a hybrid that stabilizes its ancestry - is much more common in plants than animals, since plants can better tolerate multiple copies of their genomes, Session explained. "In addition to identifying the subgenomes, we can also tell you the order in which they were put together." Using our method, we can figure out the ancestral origin of different chromosomes just by studying the polyploid genome itself, and divide the chromosomes into sets, or 'sub-genomes,' derived from its various ancestors," he said. "In many cases, the ancestors of living polyploids are not known. They also use it to tease out the disputed ancestries of other hybrids, including false flax and strawberries. ![]() In the article, they apply the method to some well-studied cases of polyploid hybrids, such as tobacco, cotton and cyprinid fish, such as goldish and carp. "So if we find sets of chromosomes in a polypoid that carry different repetitive elements, that proves hybrid ancestry and allows us to figure out which chromosomes were inherited together coming from the various progenitor species." "Each ancestral genome carries a unique set of repetitive elements," Session explained. Unlike previous methods, which use comparison with related non-hybrid species to decipher polypoid ancestry, the authors' method allows them to discover distinct ancestries by looking at genomic patterns in the hybrid itself. Rokhsar, a professor of genetics, evolution and development at the University of California, Berkeley, outline a way to trace these genomes back to the polypoid hybrid's parent species. In "Transposon signatures of allopolyploid subgenome evolution," a recent article published in the journal Nature Communications, Binghamton University Assistant Professor of Biological Sciences Adam Session and Daniel S. In some cases, including strawberries, goldfish and several other species, these disparate parental chromosomes become doubled, a condition known as allopolyploidy. Hybrids - common in agriculture as well as in nature - have chromosomes from two or more parent species. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |