资讯

本研究通过整合基因组学、基因渗入和群体历史分析,揭示了亚洲鼩鼱 (Uropsilus)在中国西南山地"天空之岛"景观中的多样化模式。研究人员发现系统发育冲突源于不完全谱系分选 (ILS)、古今基因流及"幽灵渗入" (ghost introgression),证实了东亚季风气候波动驱动了长江以南谱系的辐射分化。该研究为理解山地生物多样性形成机制提供了新见解。
这项研究像侦探般抽丝剥茧:通过给北美二倍体"新证人" (F. viridis等)做基因测序"笔录",结合网状系统发育 (reticulate phylogenetics)和混合群体分析 (admixture analyses),发现八倍体亚基因组A的供体在演化路上曾与一个"幽灵物种" (已灭绝/未采样)有过基因交流 (introgression)。
Introgression levels under the generalized (a and b) and front (c and d) LDD models. (a and c) Shown are the proportion of introgressed genes (black section of the pie charts) in the invading ...
Generally, releasing more females per introgression attempt provided little added benefit. The positive effects of the genetic introgression project persist in the panther population after 20 years.
The evolutionary significance of introgression has been discussed for decades. Questions about potential impacts of transgene flow into wild and weedy populations brought renewed attention to the ...
Introgression has been used to generate novel allotetraploid Brassica germplasm, improving the yield of Brassica napus and expanding the genetic base of Brassica carinata. The identification of ...
"This highlights how important introgression events, the movement of genes across species, may have been in the evolution of the innate immunity system in humans." Earlier studies have shown that one ...
Parasite dispersal capacity and rates of genetic introgression—a study The physical movement of species determines their potential scope to leave their primary ecosystem behind in the quest for ...