Supported by the genomic data of apple and strawberry (Fragaria vesca), researchers successfully reconstructed nine ancestral chromosomes of Rosaceae family, and analyzed the chromosome fusion, fission and duplication history in three major subfamilies, including genera Prunus, Malus and Fragaria. Through analysis, they hypothesized that at least 11 fissions and 11 fusions occurred in P. mume from the nine common ancestral chromosomes. For apple, at least one WGD and five fusions took place to reach the 17-chromosome structure, compared with 15 fusions for strawberry to affect the 7-chromosome structure.
P. mume is one of the first trees that bloom in early spring, blooming even below 0℃. In this study, researchers investigated the genetic characteristics underlying the mechanisms related to acclimate to cold weather and release itself from dormancy. They found that dormancy-associated MADS-box transcription factors (DAM) family and C-repeat-binding transcription factors (CBF) were two important factors related with flowering dormancy.
As the saying goes, "Plum blossom incense from the cold weather", P. mume always has a special fragrance in winter. To understand its mechanism of floral scent, researchers identified a series genes related to the biosynthesis of volatile compounds, such as benzyl alcohol acetyltransferase (BEAT) gene. They supposed the expansion of the BEAT gene family might increase the content of benzyl acetate and therefore induces the special fragrance of P. mume.
The disease resistance related-genes may benefit the future breeding improvement. In this study, researchers found many related genes expanded tremendously in the P. mume genome, such as leucine-rich repeat receptor-like kinase (LRR-RLK) genes, the nucl
|Contact: Jia Liu|