The salt-resistant genes lost by tomatoes were recovered.

Original title: Tomatoes lost salt-resistant gene was retrieved
tomato fruit selection with its salt resistance decreased by the root system sodium potassium ion ratio increased, and the root sodium potassium ion transporter coding gene SlHAK20 in a domesticated variation point mediated tomato salt resistance decreased.
: The increase in the population of the Chinese Academy
agricultural sciences has put forward higher requirements for the efficient use of agricultural resources. According to statistics, the global saline area of up to 956 million hectares, improve the salt resistance of crops is one of the important ways to solve food security problems. Tomatoes are one of the main vegetables and originated in the Andes region of South America, where wild currant tomatoes can grow in higher salty environments. However, during domestication and breeding, humans are more concerned with the size of their fruit and lose the salt-resistant genes of wild tomatoes.
Recently, Huang Sanwen, a researcher at the Agricultural Genomics Research Institute of the Chinese Academy of Agricultural Sciences (Shenzhen), and Zhu Health, a researcher at the Shanghai Research Center for Plant Adversity Biology of the Chinese Academy of Sciences, worked together to find the missing tomato salt-resistant gene SlHAK20, which was published online in The EMBO Journal, an authoritative academic journal.The
team measured the sodium and potassium ion content of 369 tomatoes in the root and above ground, and found that the sodium potassium ions in the roots increased one by one compared to the three groups of currant, cherry and cultivated tomatoes, and were directly related to the weight of the fruit, suggesting that a decrease in salt resistance of tomatoes during domestication was likely to be associated with a greater selection of fruits. Using genome-wide association analysis, they discovered an ion transport protein gene, SlHAK20. SlHAK20 has sodium ion transport activity, genomic analysis shows that this gene has been strongly domesticated choice, the absence of a gene coding area of 6 bases led to a significant reduction in salt resistance of cultivated tomatoes.
study also found that knocking out the two ymogens of SlHAK20 in rice, OsHAK4 and OsHAK17, causes rice to be sensitive to salt stress, which means that the function of SlHAK20 esoteric gene stress in single and twin leaf crops is conservative. Breaking the chain between small fruit genes and salt-resistant genes is the next step in breeding, and the study will provide new technical solutions for the breeding of salt-estory crops.
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