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    Home > Biochemistry News > Biotechnology News > Advances have been made in the study of legume classification and the study of stequote genomics in the branch of shy grass.

    Advances have been made in the study of legume classification and the study of stequote genomics in the branch of shy grass.

    • Last Update: 2020-09-11
    • Source: Internet
    • Author: User
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    The legume is the third largest of the bee plants, with about 765 species belonging to 19,500 species.
    the world of soybean plants, the form and life type are highly diverse.
    second only to the economic value of legumes, legumes are the most important source of plant protein for humans and are even the only source of protein in some poor areas.
    about 88% of the species in soybean plants have root tumor nitrogen fixation function, providing important bio-nitrogen for agriculture and natural ecosystems.
    the use of "green manure" is of great significance to reduce the use of fertilizer, especially nitrogen fertilizer, and improve soil ecosystem.
    traditionally bean is divided into Sanyako, namely Yunshi Yako (Sumu yako), shy grass Yaco and butterfly yako and even three separate sections, and is widely accepted and recognized.
    almost all specimen museums, plants, field collection manuals and literature at home and abroad, the legumes are divided according to the classification system of the three sub-sections (or sections).
    In recent years, molecular systems studies have found that Yunshi yako is a concomited group, with shy grass subco and butterfly flower branch nested in it as a single branch, the traditional classification system of three sub-sections has been questioned.
    Legume Phylogeny Working Group, or LWG, based on yerophyl matK sequence data, built a bean system development tree that has been the most sampled to date (about 91% genus and 20% species), and combined with morphological evidence, proposed a new classification system for six subsections.
    in this classification system, only the original butterfly flower ApilionoideaeDC. is retained; the original shy grass yako no longer exists and becomes a branch of the new Yunshi Yaco Caesalpinioideae DC. mimosoid clade; except for the groups retained in the new cloud yako, the original The remaining four branches of Yunshi Yaco are proposed to be four new sub-branches: Bauhinia Yaco Cercidoideae LPWG (stat.nov.), Ganzu Yaco Detarioidee Burmeist. And the mountain ginger bean Yaco Duparquetioideae LPWG (stat.nov.).
    the new classification system will have an important impact on the study of legume taxonomy, genomics, developmental biology and evolutionary biology.
    the study was published on Taxon under the title A new subfamily classification of the Leguminosae on on a taxonomically comprehensive phylogeny.
    is one of several branches of the bee plant serum genome that undergo major structural changes.
    Previous studies, due to limited sampling, it was generally believed that structural changes occurred mainly in the original butterfly-shaped subseco, where the leafy green genomes of the original Yunshiyaco and the shoal-containing subcosm have the same conservative structure as most other bee plants.
    , however, recent studies have found that some species of the original grass-containing subco also have stethosome structural variations.
    Recently, the Kuiting Double Research Group of the Southwest China Wildlife Species Resources of Kunming Plant Institute, in collaboration with the Li Deba baht Research Group and the Wang Hong Research Group, conducted an in-depth study of the yeuna of 14 species of the three genus of the original shy grass sub-group, and the results showed that: 1) the previously reported reverse repeat sequence (IR) went to the small single copy area (SSC) 13 kb expansion is widely present in the Indo-Canadian and narrow golden genus, and is the co-diffusion of the branches of these two groups; 2) some species of IR in the large single copy area (LSC) end experienced expansion and contraction, clpP gene replication and loss of inclusions and rps18 gene reversal; 3) After the gene is transferred from the single copy zone to the IR zone, the replacement rate decreases significantly.
    addition, it was also found that the sequence differentiation of the branch segments of shy grass is very different, and the leafy body genome can effectively solve the system development relationship of shy grass branch.
    this study provides an important basis for further study of the developmental genomics of the shy grass branch and the whole legume system.
    study was published in TheTree Genetics and Genomes under the title Plastomes of Mimosoideae: structural and size variation, sequence divergence, and phylogenetic.
    research has been funded by the Ministry of Science and Technology's Basic Research Project (No.2013FY112600), the National Major Scientific Research Program Project (2014CB954100) and the Yunnan Talent Project (No.2011CI042).
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