Key genes for thickening tomato stalks have been found.

Original title: Key genes for thickening tomato stalks have been discovered
The site of the study that detected SD, Hua zhong agricultural data
Recently, the journal
Experiments
Botany published online the latest research results of the team of Ye Zhixuan, a professor at Huahua Agricultural University. The study identified the key
gene
SD1 to regulate the development of tomato stalks, and analyzed the genetic basis and regulatory mechanism of tomato stalk development from a genetic and evolutionary perspective.
, the author of the paper, said that the coarseness of tomato stalks is not only conducive to increasing production, but also improves the mechanical resistance of tomatoes, so that they can adapt to the light cultivation of free racks. At present, the research on the development and regulation of stalks in important horticultural crops such as tomatoes is very limited.
team found a significant correlation between tomato stem coarseness and the key yielding feature of fruit size. Using genome-wide association analysis (GWAS) and gene function analysis, the team located SDR9, the main effective point for regulating stem coarseness. The bit encodes a kinase-to-protein SD1. SD1 is mainly expressed in the formation layer of tomato stalks, which is positively regulating the development of tomato stem by regulating the size and number of cells in the secondary ligament.
11-bp insertion of missing (indel_11) in the SD1 promoter is completely interlocked with the tomato stem, and the mutation of the bit affects the expression of the gene, which in turn regulates the development of the tomato stalk. Evolutionary analysis shows that the SD1 indel_11 be artificially selected during the improvement of tomatoes from cherry tomatoes (CER) to modern large fruit tomatoes (BIG). This proves that the gene is the genetic basis that causes the stems of tomatoes to thicken during genetic modification.
team developed InDel_11 molecular markers based on SD1 polymorphisms for rapid identification of tomato stem coarseness in production. SD1 gene identification and marker development can be used for molecular breeding of high-yielding high-quality tomatoes, while providing genetic resources for the cultivation of new varieties suitable for light and simplified cultivation.
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