For the first time, scientists have deciphered the genome of the same tepid alfalfa.

Original title: For the first time, scientists have deciphered the genome of the same-origin tepid alfalfa
"King of Pasture
Alfalfa
is the world's most important grazing crop. However, because alfalfa is a four times the same origin, heterohua pollination. This greatly hinders the
of
and the cultivation of new varieties of genetic code.
May 19th, Nature-Communication published online the four-fold genome of China's endemogeneity species
Xinjiang
large-leaf alfalfa, and successfully assembled the telithic genome on 32 chromosomes.
chen Haitao, Ph.D. student at Kunming Institute of Zoology, Chinese Academy of Sciences, is the first author of the paper, Qiu Qiang and Wang Wen, professors at Northwestern University of Technology, and Chen Jianghua, a researcher at Xishuangdana Botanical Garden of the Chinese Academy of Sciences, are co-authors of the paper.
with the continuous improvement of the living standards of urban and rural residents in China, the demand for animal products such as cattle and sheep is increasing. The surge in livestock farming has greatly increased the demand for high-quality pastures, especially alfalfa. However, China can only produce more than 2 million tons of high-quality alfalfa per year, from 5 million tons of demand there is still a huge gap. For a long time, alfalfa is highly dependent on imports, of which high-quality dates account for more than 80% of the total import of grass. In addition, the domestic lack of independent intellectual property rights of high-quality alfalfa varieties of resources, high-quality seeds rely heavily on imports.
Participating in the study of Guangdong Sanjie Pastoral Biotech Co. , Ltd. is committed to solving the source of China's alfalfa fine new varieties cultivation and breeding safety issues, layout of grass species quality "breeding - breeding - push" and grass products "planting - processing - sales" combined with the complete grass industry chain. This time through several units within the United Nations, access to high-quality alfalfa genome map.
On this basis, the team further developed an efficient gene editing technology system based on CRISPR/Cas9, and successfully bred a new batch of multi-leaf alfalfa materials, whose hybrid offspring exhibited stable multi-leaf characteristics and did not contain genetically modified markers. This editing technique can accurately target crop mutants without importing exogenated genes, greatly speeding up breeding.
MsPDS gene mutants showed dwarf and arrached physiomes. The completion of this achievement will
make it possible to implement the molecular breeding strategy of alfalfa, thus providing important scientific and technological support for accelerating the cultivation of high-quality varieties and the development of grass industry in China.
gene-editing MsPALM1 gene exhibits leafy symptoms. Northwestern University of Technology
It is learned that the relevant key technologies of the results have been declared invention patents, multi-leaf alfalfa new species has been china's Ministry of Agriculture and Rural Affairs intermediate test approval, followed by laws and regulations will gradually declare new varieties and commercialization.
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