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A biogeography‐based management for Mytilus chilensis: The genetic hodgepodge of Los Lagos versus the pristine hybrid zone of the Magellanic ecotone
Aquatic Conservation: Marine and Freshwater Ecosystems ( IF 2.4 ) Pub Date : 2020-01-20 , DOI: 10.1002/aqc.3271
Borja Díaz‐Puente 1 , Alfonso Pita 1, 2 , Juan Uribe 3 , José Cuéllar‐Pinzón 4 , Ricardo Guiñez 5 , Pablo Presa 1, 4
Affiliation  

  1. This study was intended to identify mussel species from the Magellanic ecotone, quantifying interspecific hybridization within Mytilus and depicting the genetic architecture of Mytilus chilensis in its South Pacific range.
  2. The analysis comprises the sub‐Antarctic Magallanes Province as a rich ecotone of climates, ecosystems and admixed faunas embedded among the biogeographic regions of the Pacific, the Atlantic, and Antarctica.
  3. Highly conserved molecular sequences within species were used to identify species, and polymorphic microsatellites were used to calculate the genetic architecture of M. chilensis. The absence of the invasive species Mytilus galloprovincialis from the M. chilensis range clarifies previous doubts on its expansion southward from the Arauco Gulf. The ubiquitous presence of the typical Glu‐5′‐Me‐15/16 PAP allele of Mytilus trossulus in the Northern Hemisphere might come from hull biofouling, but rather it seems to be an ancient polymorphism conserved in M. chilensis as occurs in blue mussels from other regions of the Southern Hemisphere. There is a very limited connectivity (FST = 0.167) between two latitudinal gene pools of M. chilensis that are highly divergent in composition, architecture, and ecological relevance.
  4. Fifty years of aquaculture enhancement in Los Lagos explains its high diversity and genetic heterogeneity among patches, so its mussel management should seek a balance between exploitation and environmental sustainability.
  5. The Magellanic ecotone bears a pristine M. chilensis × Mytilus edulis platensis hybrid zone around the Southern Cone, larger (450 km) than previously thought. Such a hybrid zone permeates one of the last remaining wilderness areas in the world (Cape Horn Biosphere Reserve) and is a natural laboratory for addressing introgression, hybridization, and evolution of Mytilus spp. genomes in their last southern frontier.


中文翻译:

基于Mytilus chilensis的生物地理管理:洛杉矶拉各斯的遗传大杂烩与麦哲伦交错带的原始杂种区

  1. 这项研究旨在从麦哲伦过渡带中鉴定贻贝物种,量化Mytilus内的种间杂交,并描绘Mytilus chilensis在其南太平洋范围内的遗传结构。
  2. 分析包括南极麦哲伦省,这是气候,生态系统和混合动物区系的丰富生态交错带,嵌入在太平洋,大西洋和南极洲的生物地理区域之间。
  3. 物种内高度保守的分子序列用于鉴定物种,多态微卫星用于计算智利支原体的遗传结构。M. chilensis范围内没有入侵物种Mytilus galloprovincialis,这澄清了先前对其从Arauco海湾向南扩展的怀疑。北半球的Mytilus trossulus的典型Glu-5'-Me-15 / 16 PAP等位基因普遍存在,可能是由于船体生物结垢造成的,但它似乎是一种古老的多态性,在智利贻贝中象蓝贻贝一样。来自南半球其他地区。连接非常有限(˚F ST = 0.167)两个纬向基因库之间M. chilensis的那些组合物中,体系结构和生态相关性高度发散。
  4. 洛斯拉各斯(Los Lagos)加强水产养殖已有50年,这说明其斑块之间具有高度的多样性和遗传异质性,因此其贻贝管理应在开发与环境可持续性之间寻求平衡。
  5. 麦哲伦过渡带在南锥体周围带有一个原始的M. chilensis ×紫草Mytilus edensiss platensis杂种区,比以前想象的要大(450 km)。这样的杂种区遍布世界上最后一个荒野地区(合恩角生物圈保护区),是解决Mytilus spp渗入,杂交和进化的天然实验室。他们最后一个南部边境的基因组。
更新日期:2020-03-20
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