分析小麦的野生亲属Thinopyrum intermedium和Roegneria kamoji的基因组揭示了不同的多倍体进化路径
Silong Sun1, Naixiu Che2, Liyang Chen3
1State Key Laboratory of Wheat Improvement, College of Agronomy, Shandong Agricultural University, Tai'an, Shandong, China. sunsl@sdau.edu.cn.
Nature communications
|August 18, 2025
概括
野生小麦的亲属Thinopyrum intermedium和Roegneria kamoji的基因组揭示了复杂的多体进化. 他们的基因组洞察力为改善小麦和料作物,包括增强抗病能力提供了宝贵的资源.
科学领域:
- 基因组学和植物科学 植物科学
- 提高作物质量 的方法.
- 进化生物学 进化生物学
背景情况:
- 野生Triticeae部落的亲属是小麦改进的关键遗传资源.
- 这些物种复杂的多倍体基因组是由杂交形成的,人们对其了解甚少.
- 了解这些基因组是释放它们在作物育种方面的潜力的关键.
研究的目的:
- 为了组装和分析Thinopyrum intermedium和Roegneria kamoji的基因组.
- 为了阐明这些Triticeae物种的进化历史和基因组贡献.
- 识别有助于疾病耐药性的遗传元素,以提高作物质量.
主要方法:
- 基因组组装和Th.的比较基因组分析. 中间和R.卡莫吉.
- 遗传学分析,以重建进化关系和多化事件.
- 特定基因同类的识别和表征,如Fhb7.
主要成果:
- 这就是Th. 中间基因组包括Pseudoroegneria (St),Dasypyrum (V) 和Aegilops (J) 的贡献.
- R. kamoji的基因组包含与Pseudoroegneria (St),Dasypyrum (V相关的"Y") 和Hordeum (H) 相关的子基因组.
- 遗传学数据表明独立的多化事件,Pseudoroegneria作为母体捐赠者;R.卡莫吉从四化Roegneria进化.
- 在R. kamoji中,有两种Fhb7同类物质以剂量取决的方式增强了Fusarium头部炎症的抵抗力.
结论:
- 这项研究完善了对Triticeae多倍体进化和跨物种基因组贡献的理解.
- 来自Th.的基因组资源. 中间和R.卡莫吉对于小麦改进有价值.
- 已识别的Fhb7同类物为繁殖Fusarium头部病菌耐药作物和料提供了潜力.
相关概念视频
Evolutionary Relationships through Genome Comparisons
6.1K
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...
6.1K
Gene Duplication and Divergence
6.3K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.3K
Formation of Species
42.4K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
42.4K
Overview of Transposition and Recombination
16.1K
Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
16.1K
Gene Flow
35.6K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
35.6K
Asexual Reproduction
33.9K
Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
33.9K


