Jute salt tolerance adaptation mechanisms and domestication history is revealed

The reporter learned from the Institute of Hemp of the Chinese Academy of Agricultural Sciences on October 11 that the institute revealed the salt tolerance adaptation mechanism and domestication history of jute through the joint analysis of genome, transcriptome and epimodifier by 3 units inside and outside the United Nations, and found the candidate sites of 11 important traits of jute through genome-wide association analysis.

This study provides valuable genetic resources for the future of stress tolerance such as salt tolerance and fiber breeding of jute, and is of great significance for reviewing the genetic basis of early crop breeding. Recently, the results were published in The Plant Journal.

Jute is the second largest natural fiber crop in the world, with 80% of the world’s phloem fibers grown. Jute has many excellent agronomic traits, can be used in high-end clothing, degradable materials, industrial papermaking, health food and other fields, the current worldwide demand for jute is increasing, but the molecular level of jute understanding is still little known, which makes the genetic improvement of jute have limitations.

In this study, researchers used a variety of sequencing techniques to sequence, assemble and annotate the genome of the jute salt-tolerant variety TC008-41, and evaluated the expansion and contraction of gene families in the adaptive evolution of jute by constructing the largest likelihood tree of 13 plants.

The results showed that the expanded gene family enhanced jute’s resistance to abiotic stress through DNA repair and clearance of reactive oxygen species (ROS). Further research found that in the process of gene family domestication, evolutionary genes have obvious epigenetic and transcriptional expression changes, and some important evolutionary genes have obvious salt-tolerant GWAS signals, which may play an important role in the adaptation of plant salt stress and have important significance for molecular breeding of jute salt tolerance.

The reviewers of the paper believe that through multi-omics research, this result reports the high-quality jute reference genome, 256 jute germplasm genome resequencing, 11 agronomic traits of GWAS and jute on the salt stress response of multi-omics analysis, through large-scale resequencing to understand the evolutionary history of jute, revealed the genes related to important breeding traits such as salt tolerance, fiber yield and fiber quality, and analyzed the stress adaptation mechanism of jute salt tolerance. This study adds valuable resources to the study and improvement of jute and provides valuable information for understanding the genetic basis of environmental adaptation, domestication and improvement of jute, as well as some important traits.

GWAS and transcriptome analysis of jute salt tolerance-related genes. Image courtesy of the interviewee

The research has been funded by the National Natural Science Foundation of China and the Science and Technology Innovation Project of the Chinese Academy of Agricultural Sciences. (Source: China Science Daily, Wang Haohao, Yang Zemao)

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