Researchers from Shanghai Jiao Tong University have successfully assembled
the first chromosome-level, haplotype-resolved genome of the Chinese cherry
cultivar "Zhuji Duanbing." The findings of the study provide important
insights into the genetic determinants of fruit firmness, offering a
valuable resource for breeding programs of Chinese cherry.



Chinese cherry is highly valued for its economic and nutritional benefits,
yet its soft texture poses a challenge to its marketability. The research
team compared the soft-fleshed Zhuji Duanbing with the firmer "Heizhenzhu"
sweet cherry and found that pectin, cellulose, and hemicellulose have
critical roles in determining fruit texture.



The softer texture of Zhuji Duanbing was linked to accelerated cell wall
degradation during ripening, particularly within the pectin matrix. The
research team identified two genes, GalAK-like and Stv1, as key regulators
of this process, showing significant expression differences between the two
varieties. These genes, involved in pectin biosynthesis and modification,
are promising targets for future genetic improvements.



[phys.org]