Chinese plum is one of the most widely cultivated plum species in the world. It has strong adaptability and high economic and ecological value. Recently, the plum and apricot germplasm improvement team of Zhengzhou Institute of Fruit Research, Chinese Academy of Agricultural Sciences and the peach germplasm resources team have jointly deciphered the high-quality Chinese plum genome, laying a genetic foundation for the improvement of important economic traits. The related results were published on September 2 in” The Plant Journal.
According to Dr. Huang Zhenyu, the research team first used second-generation, third-generation and Hi-C sequencing techniques to draw the genome map of the plum apricot germplasm improvement team independently selected variety’Zhongli No. 6′, and its assembly quality was the existing Optimal, laying an important foundation for in-depth analysis of Chinese plum genome variation, molecular breeding and excellent gene discovery.
On this basis, the study conducted a whole-genome high-depth resequencing data analysis. A total of 3,380,659 high-quality SNPs were identified, and 74 Chinese plum core collections were clustered into South, North, Northeast and foreign varieties It is found that the southern breed group is relatively primitive and has rich genetic diversity, and there is gene exchange with other breed groups. From the genetic level, it once again confirms that the Yangtze River Basin in China is the original domestication center of Chinese plums.
Chinese plum is highly adaptable. It is cultivated on a large scale in my country from Guangdong Province in the south and Heilongjiang Province in the north, but there are few reports on its adaptive mechanism. The study conducted a selection pressure analysis among different species groups and identified 35 selected sites. Among them, the key genes of important pathways such as flowering regulation, disease resistance and stress resistance, and flavonoid metabolism were significantly enriched. In addition, the expansion of gene families and the Shrinkage analysis shows that the above-mentioned gene families have expanded significantly during the evolution of the genome, initially revealing the molecular basis of the domestication of important traits of Chinese plum, and providing an important reference for the subsequent discovery of excellent genes related to Chinese plum adaptability.
The research was funded by the National Key Research and Development Program, the Science and Technology Innovation Project of the Chinese Academy of Agricultural Sciences and other projects.
link to the original text:https://onlinelibrary.wiley.com/doi/abs/10.1111/tpj.15482