Scientists from China and the United States reported that they successfully mapped the first genome of Papaya. This is the fifth genomic sequence of angiosperms (ie, flowering plants) that has been deciphered by scientists after Arabidopsis, rice, poplar and grapevines. It will provide new information for the study of the evolution of flowering plants.
The scientists involved in this research came from institutions such as the University of Hawaii, the University of Illinois, Nankai University, Tianjin, and the Functional Genomics and Biochip Research Center of Tianjin.
According to a news bulletin released by the University of Illinois, Chinese and American scientists have drawn up a genome sketch of genetically modified papaya that has been grown in the United States for many years. This sketch has measured the sequence of more than 90% of papaya genes. The preliminary analysis shows that after approximately 72 million years ago, papaya was separated from the Arabidopsis on the evolutionary path, and then it embarked on another evolutionary path. Studies have shown that the number of genes related to lignin synthesis in papaya is less than poplar, more than Arabidopsis thaliana. Scientists say this is consistent with evolution because papayas evolved from herbaceous plants to woody plants.
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