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Study reveals surprising amount of gene flow among butterfly species（图）
surprising amount gene flow among butterfly species
2019/11/15
Scientists know that shared parts of DNA create color patterns in some passion vine butterflies. The patterns help the butterflies ward off predators.Now a new study in Science provides evidence that ...
Genetic diversity within and gene flow between three draught horse breeds using genealogical information
genetic drift inbreeding Silesian Noriker Noriker Czech-Moravian Belgian horse
2016/11/11
Three draught horse breeds are maintained in the Czech Republic: the Silesian Noriker (SN), the Noriker (N), and the Czech-Moravian Belgian (CMB). Because the SN and CMB populations are currently clos...
A Method for Detecting Population Genetic Structure in Diverse, High Gene-Flow Species
Diverse High Gene-Flow Species
2015/12/11
Detecting small amounts of genetic subdivision across geographic space remains a persistent challenge. Often a failure to
detect genetic structure is mistaken for evidence of panmixia, when more powe...
摘要群体遗传结构上的差异是遗传多样性的一种重要体现，对群体遗传结构的研究已有较久的历史，而其中的基因流研究近些年来越来越受到重视。它对群体遗传学、进化生物学、保护生物学、生态学有着极其重要的作用。虽然传统的群体遗传学能估测基因流大小，但它的精确性还有很大局限性。随着生物技术的进步，对基因流的研究逐渐向分子水平过渡，应用蛋白质电泳技术、分子标记技术(RAPD、RFLP、VNTR、ISSR、DNA测序...
降低转基因植物外源基因扩散的分子策略 Molecular Strategies for Decreasing the Gene Flow of Transgenic Plants
转基因植物 基因扩散 分子策略
2008/1/8
摘要
转基因植物可以通过花粉或种子将外源基因转移到其他植物，从而对生态环境造成潜在的危害。如何降低外源基因的扩散已引起了人们的极大关注。目前降低外源基因扩散的方法主要有叶绿体转化、花粉不育、种子不育、闭花受精、无融合生殖、暂时性控制及转基因缓和等。主要对各种方法的原理和优缺点及目前的使用情况进行综述。Abstract: Transgenic plants can transfer foreign...
Strong genetic clines and geographical variation in gene flow in the rocky intertidal barnacle Balanus glandula
California Current cline, dispersal marine invertebrate
2015/12/16
A long-standing issue in marine biology is identifying spatial scales at which populations
of sessile adults are connected by planktonic offspring. We examined the genetic continuity of
the acorn ba...