Shenzhen Huada Gene Research Institute said on the 6th that the world's first pear genome sequence map has been completed through the joint cooperation of the International Pear Genome Collaborative Team of 7 domestic and foreign research institutes and more than 60 genome researchers.
The research results lay a genetic foundation for the cultivation of high-yield, high-quality, low-input new varieties of pears, and provide a wealth of data resources for the comparative genomics and evolution studies of Rosaceae fruit trees.
Huada Gene said that China is the origin of pears and is also the world’s largest producer of pears, with annual production accounting for more than 60% of the world’s total. Pears are grown and distributed in China in a very wide range, being the third largest fruit after apples and citrus. However, due to the lag of molecular biology and genomics research in pears, restricting directional breeding and molecular genetic research has become one of the major bottlenecks in the pear industry.
After two years of sequencing, assembly, and annotation work, the complete genome map of "Danshansu Pear" was completed. Dangshan Pear is currently the largest cultivated area in China and in the world. Through a new generation of high-throughput sequencing platforms, the researchers have completed highly assembled and highly repetitive diploid fruit tree genome assembly with a length of about 97.1% of the total length of the pear genome, and the high-density genetic linkage map has been adopted. The correspondence with 17 chromosomes was achieved.
Professor Zhang Shaoling, director of the International Pyrogenome Cooperation Group and director of the Pear Research Center of Nanjing Agricultural University, said that sequencing the entire genome of Pear reveals the self-incompatibility of pears, tree growth and development, fruit development and quality development, and disease resistance. The molecular mechanisms of the biological characteristics of insects, resistance to stress, and the mining of important functional genes have opened up new avenues.
Professor Wang Jun, Executive Director of BGI, said that the completion of whole genome sequencing is an important step in exploring the genetic properties of pears. Huada hopes to work with researchers around the world to decipher millions of animal and plant genomes that are important economic and scientific research values, tap genetic resources, and promote systemic research, thereby promoting the development of agriculture and the environment and benefiting the society.
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