The root system of wheat pregnancy spike is deeply regulated gene identification
Last Update: 2021-02-23
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, the Journal of Plant Biotechnology published online the latest results of the wheat genetic resources exploration and utilization innovation team at the Crop Science Research Institute of the Chinese Academy of Agricultural Sciences. Through genome-wide association analysis, they found that the wheat bubble sub-selector gene TaVSR1-B promoter region transsorts were significantly related to the root depth of pregnancy spike.
according to jing Yulian, author of the paper, root depth is an important component of crop root formation and plays an important role in crop growth and development, yield formation and absoic stress tolerance. The pregnancy spike period is the key period of wheat yield formation, and the root depth of this period directly affects the absorption of deep soil moisture and nutrients by wheat, and ultimately on yield and resistance. However, due to the difficulty of root research, the genetic mechanism affecting the depth of root during pregnancy is not clear.
the study looked at the root depth of 323 wheat species and genetically genotyped the material using the wheat 660K SNP genome chip. Through genome-wide association analysis, a fluid bubble sub-selector gene TaVSR1-B associated with the root depth of the pregnancy spike period was detected.
differences in the rota in the TaVSR1-B promoter region of the wheat material lead to different levels of DNA methylation and histoprotein modification, which in turn affect gene expression and make significant differences in root depth during pregnancy.
, the team esoterically identified wheat, rice, and mutant materials that expressed the TaVSR1-B gene, revealing its effect on root growth. Preliminary evidence suggests that TaVSR1-B may affect root depth by affecting the formation of fluid bubbles, promoting the transformation of elongation cells into mature cells. Taken together, TaVSR1-B expression increased, the root elongation area becoming shorter, the mature area becoming longer, and the root depth increased.
the study revealed the function of TaVSR1-B in controlling root depth and defined the molecular structure of excellent iono-multiply and differential expression associated with deep root systems. This work provides a theoretical basis for explaining wheat root development and provides excellent gene and quality resources for wheat breeding.
research has been funded by the National Natural Science Foundation of China, the National Key Research and Development Program and other projects. (Source: Li Chen, China Science Journal)
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