杂交和多倍化是植物的一种普遍现象并在进化中扮演着重要角色,通过种间杂交和基因组加倍的异源多倍化过程是新物种形成的主要动力和表型创新的重要来源。杂交多倍化常常会诱发基因组发生一系列遗传上和基因表达上的快速变化。近年来的研究表明,在基因组序列丢失和部分同源基因的表达上常有偏向某一个亚基因组的现象,但对这一现象的普遍性及其潜在机制尚未达成共识。
Despite their ubiquitous distribution and significant ecological roles,soil microorganisms have long been neglected in investigations addressing parasitic planthost interactions.Because nutrient depri
植物化石在植物系统演化、植物地理和古环境演变的研究中起着至关重要的作用,近十几年来中国新生代植物化石的研究进展迅速,主要表现为以下5 个方面:1)研究队伍增多,越来越多的新生代植物化石群被发现和报道,据不完全统计,自2011 年以来,中国古植物学家报道和发现了100 多个新种,仅西双版纳热带植物园古生态研究组2011 年以来就发表了化石新种47 个,这些发现极大地丰富了人们对中国新生代植物多样性的
Both invasion and decline of plant populations are common concerns of ecology,conservation biology and management practices.However,the adaptation and evolution of plant populations remains poorly und
Monitoring air pollution is related to the life quality and health of the people.In this study,we present concentrations of the heavy metals(e.g.cadmium(Cd),chromium(Cr),copper(Cu),nickel(Ni),lead(Pb)
Nitrogen is an essential element to all life forms,and its availability in environments is strongly dependent on nitrification.Ammonia oxidation,the crucial step of nitrification,is carried out by amm
桦木属(Betula L.)大约有65 个种和亚种,广泛分布于北半球,具有重要的生态价值和经济价值.由于广泛的自然杂交、多倍化及形态性状变异及趋同进化,该属种间进化关系尚未解决.高通量测序技术,如RADseq,可以产生成千上万个标记,有望解决复杂类群的进化关系.在本研究中,我们对桦木属开发了RAD标记,以欧洲垂枝桦(B.pendula)全基因组序列作为参考,通过比对获得大量长度在300bp 以上的
Replication factor C(RFC)is a conserved eukaryotic complex consisting of RFC1/2/3/4/5.It plays important roles in DNA replication and the cell cycle in yeast and fruit fly.However,it is not very clear