Artificially grown peaches without wild peach aroma? These 25 genomic loci are the reason

Artificially grown peaches without wild peach aroma? These 25 genomic loci are the reason

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Science and Technology Daily News (reporter Qu Jian) According to the latest news of the Chinese Academy of Agricultural Sciences (hereinafter referred to as the Chinese Academy of Agricultural Sciences), the peach resources and breeding team of the Zhengzhou Institute of Fruit Trees of the Academy of Sciences deciphered the high-quality new genome of peaches and the genetic evolution mechanism of fruit aroma through the analysis of aroma substances of 256 peach germplasm resources, laying a foundation for the search for rich "peach flavor" and peach flavor improvement. The results of the research were recently published in the Journal of Botany.

Wang Lirong, the chief of the team and a researcher at the Zhengzhou Institute of Fruit Trees of the Chinese Academy of Agricultural Sciences, said that "peach and plum do not speak, and they become their own", which means that peach and plum cannot speak, but they can attract people, so that they are trampled out of the path under the tree. The reason is that in addition to the fragrant flowers of peach and plum, its fruits smell fragrant and delicious, and are also widely loved by consumers. However, the aroma and taste of different varieties of peaches vary widely.

The team first combined the second- generation, third-generation and Hi-C sequencing technology to map the high-quality genome of the important local peach cultivar "Morning Sea Nectar", and its assembly quality was significantly better than that of the published genome, which provided an important reference for the in-depth analysis of the variation law of the peach genome, molecular breeding, and excellent gene exploration, and elucidated the change law of aroma substance content in peach domestication. On this basis, the aroma substance analysis of 256 peach germplasm resources was carried out, and the study found that compared with the wild population, the content of the five main aromatic substances was reduced by 18.3%-90.7% in the breeding variety group, which made the aroma of the breeding variety significantly decrease and the peach taste was insufficient; using the newly assembled "morning seawater honey" high-quality genome, 214 genomic loci associated with the fruit aroma substance were identified, and 25 of them were artificially selected, resulting in the loss of some genomic loci controlling the aroma , at the genomic level, explains the molecular mechanism of fruit aroma decline in peach domestication and breeding.

Source: Science and Technology Daily