The map cloning method finds the Dry gene that controls the juicy ness of sweet sorghum stalks.

In the course of plant evolution, the production of the veto tissue is a major event.
the tube plant provides structural support and water transport function for the stem by producing a wood-to-wood catheter, thickening the secondary cell wall and the procedural death of mature cells.
stalks is an important form of crops and is closely related to the development process of the wood department.
previous studies have found that there are specific NAC transcription factors in the amoeba and small bowls to regulate the development of the wood department and regulate the water transport of plant tissue.
, because the stem holding juice phenotype has not been widely valued, there are very few reports of selected control of the stalks juice gene in crop domestication.
sweet sorghum is a variant of common seed solid sorghum, stalks juice is a typical characteristic of sweet sorghum, directly affect the stalks sugar content, total biomass and resistance, more than 100 years ago has been concerned, but its regulatory genes have not yet been cloned, molecular mechanism has been a mystery.
the Jing Haichun Research Group of the Institute of Botany of the Chinese Academy of Sciences identified the Dry gene that controls the juicy ness of sweet sorghum stalks through genome-wide correlation analysis and map cloning.
researchers found that the gene encodes plant-specific NAC transcription factors, and that its lack of function is an important reason for the richness of the sweet sorghum stalks, which are selected during the origin and domestication of sweet sorghum.
population genomics analysis showed that the Dry gene was domesticated from wild sorghum to cultivated juiceless sorghum, resulting in a decrease in genetic polymorphism, and screening the dry mutants was a key step in the selection of juicy sweet sorghum.
the study is the first to reveal the role of NAC transcription factors in stem moisture transport in single-leaf plants.
the conservatism of this gene in the family of the undergraduate crop, it helps to promote the genetic improvement of the stalks holding table of the crop, and provides the possibility for obtaining grain and straw "double harvest" in crop breeding.
published the results online on October 11th in the international academic journal Plant Cell, and was highly regarded by journal reviewers.
, the results were also reported by the American Association of Plant Biologists entitled A-crucial gene controls stem juicyness in sorghum and beyond.
report, citing Dr. Thomas Juenger of the University of Texas, said the work was a major discovery of the signature gene of sweet sorghum and an example of a combination of genetic maps, natural variations, and genetic ally to understand key genetic factors in important domestication events. Zhang Limin, Cold Chuanyuan, Luo Hong, Wu Xiaoyuan and Liu Zhiquan of
Jinghaichun Research Group are the co-first authors of the paper, and Jing Haichun and Professor of Agricultural University of China are the co-authors of the newsletter.
the research was supported by the National Science Foundation of China, the National Science and Technology Support Program of the Ministry of Science and Technology and the Science and Technology Service Network Initiative of the Chinese Academy of Sciences.
Source: Plant Research Institute.