整基因组重新排序的景观适应性进化的遗迹海 (Larus relictus)
Chao Yang1,2,3, Qingxiong Wang1,3, Kuo Sun1,2
1Shaanxi Key Laboratory of Qinling Ecological Security, Shaanxi Institute of Zoology, Xi'an, 710032, China.
BMC genomics
|January 25, 2025
概括
易受伤害的遗迹海 (Larus relictus) 的全基因组重新排序揭示了低基因多样性,并确定了,和感官适应的基因. 这项研究提供了对其进化历史和生存生存能力的见解.
科学领域:
- 基因组学就是基因组学.
- 进化生物学 进化生物学
- 鸟类学 鸟类学是一门学科.
背景情况:
- 遗迹海 (Larus relictus) 是一个脆弱的物种,是中国一级国家保护的鸟类.
- 关于Larus relictus的进化历史和种群结构的知识有限.
研究的目的:
- 通过全基因组再测序来探索Larus relictus的遗传关系和种群结构.
- 通过分析基因组数据来了解Larus relictus的适应性进化.
主要方法:
- 在14个Larus relictus和3个Larus brunnicephalus个体的全基因组重新排序.
- 基因组变异分析,包括识别异构性单核酸多态 (SNP).
- 人口遗传多样性分析和人口历史重建.
主要成果:
- 在Larus relictus中发现了低核酸多样性 (0.00029) 和没有明显的种群结构.
- 人口历史揭示了两种物种的种群规模下降,有不同的模式.
- 鉴定了与部适应 (BMP4),口腔和舌头进化 (HAND2,NEUROG1,COL11A2,EDNRB),苦味反应 (PIGR,PLCB2),精子发育 (KLHL10,TEKT3),男性激素分泌 (MED1,CNOT9,NR5A1,PATZ1) 以及适应高海拔和感觉特征 (嗅觉,内耳,虹膜颜色) 相关的基因.
结论:
- 推断出Larus relictus对视力的进化压力较少适应,可能与养行为有关.
- 综合的基因组分析为Larus relictus的进化特征提供了洞察力.
- 这项研究为研究Larus relictus的未来生存可行性提供了新的视角.
相关概念视频
Multi-species Conserved Sequences
3.9K
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...
3.9K
Evolutionary Relationships through Genome Comparisons
5.7K
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...
5.7K
Conservation of Small Populations
13.1K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
13.1K
Convergent Evolution
27.4K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
27.4K
Gene Evolution - Fast or Slow?
7.0K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.0K
Exon Recombination
3.5K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.5K


