Researchers have developed the first tea tree high-density SNP chip

IT Home December 21 news, recently, the Chinese Academy of Agricultural Sciences Tea Research Institute Tea Plant Genetic Breeding Team based on the "Longjing 43" genome reference sequence and tea plant resequencing data, developed a 200K tea tree SNP chip. The research was published in the Plant Biotechnology Journal.

The chip is the first tea tree high-density SNP chip, based on the "Longjing 43" (female) and "pekoe early" (male) F1 populations as materials, the chip can map 18226 SNP sites, obtain 5325 bin-markers, the total length of the linkage map is 2107.01 centimeters, and the average genetic distance of adjacent markers is 0.39 centimeters, which constructs the linkage map with the highest genetic density at present.

Experimental verification shows that the chip can effectively locate key QTL sites and explore important functional genes of tea plants. Based on its SNP typing of different tea plant varieties, it was found that two strong selection sites between large leaf species and small leaf species of tea plant were of great significance to reveal the key genes of tea quality regulation and the evolutionary relationship between the two varieties.

IT Home learned that the research was supported by the National Key Research and Development Project, the Scientific and Technological Innovation Project of the Chinese Academy of Agricultural Sciences, and the National Natural Science Foundation of China.