Genome sequencing supports a multi-vertex model for Brassiceae species
Feng Cheng1, Jianli Liang1, Chengcheng Cai1
1Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing, China.
Current Opinion in Plant Biology
|March 1, 2017
Summary
The Brassica genus and radish share a common evolutionary origin from whole genome triplication (WGT). This study proposes a new model for creating novel allopolyploid crops using Brassiceae mesohexaploids.
Area of Science:
- Plant genetics and evolutionary biology
- Crop science and breeding
Background:
- The Brassica genus, vital for agriculture, provides a model for polyploid evolution studies.
- Brassica genomes exhibit whole genome triplication (WGT) and subsequent subgenome dominance, including biased gene fractionation and expression.
- Radish (Raphanus sativus), a member of the Brassiceae tribe, shares a similar evolutionary history with Brassica, originating from the same WGT event and displaying comparable subgenome dominance.
Purpose of the Study:
- To investigate the evolutionary relationships between Brassica species and radish.
- To propose an extended model for understanding polyploid evolution within the Brassiceae tribe.
- To explore the potential of utilizing Brassiceae mesohexaploids for developing new allotetraploid crop species.
Main Methods:
- Comparative genomic analysis of Brassica and Raphanus sativus.
- Molecular dating to infer evolutionary timelines.
- Development of a multi-vertex model to represent interspecies relationships.
Main Results:
- Radish shares a similar evolutionary origin with Brassica species, stemming from the same whole genome triplication event.
- Evidence of subgenome dominance, including biased gene fractionation and gene expression, is present in both Brassica and radish genomes.
- An extended multi-vertex model was developed, building upon the traditional Brassica 'triangle of U'.
Conclusions:
- Brassica and radish have a closely related evolutionary trajectory due to shared polyploidization events.
- The proposed multi-vertex model offers a framework for understanding the complex evolutionary landscape of the Brassiceae tribe.
- This model highlights the potential for using Brassiceae mesohexaploids in breeding programs to create novel allopolyploid oil and vegetable crops.
More Related Videos
Related Concept Videos
02:51Multi-species Conserved Sequences
4.9K
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
4.9K
02:54Evolutionary Relationships through Genome Comparisons
7.1K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
7.1K
03:00Next-generation Sequencing
99.9K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
99.9K
01:29Modern Molecular Taxonomy
789
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
789
02:02Genomics
41.2K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
41.2K
02:16Light Acquisition
9.7K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
9.7K