The common walnut(Juglans regia)is one of the most economically important nut trees cultivated worldwide.Despite its importance,no comprehensive evaluation of walnut tree population genetics has been undertaken across...The common walnut(Juglans regia)is one of the most economically important nut trees cultivated worldwide.Despite its importance,no comprehensive evaluation of walnut tree population genetics has been undertaken across the range where it originated,Central Asia.In this study,we investigated the genetic diversity and population structure of 1082 individuals from 46 populations across Central Asia.We found moderate genetic diversity of J.regia across Central Asia,with 46 populations clustered into three groups with a weak relationship between genetic and geographic distance.Our findings reveal that the western Himalaya might be the core region of common walnut genetic diversity in Central Asia and that,except for two populations in Gongliu Wild Walnut Valley,humans might have introduced walnut populations to Xinjiang,China.The observed distribution of the genetic landscape has probably been affected by historical climate fluctuation,breeding system,and prolonged anthropogenic activity.We propose the conservation of the core genetic diversity resources in the western Himalaya and pay special attention to populations from Gongliu in Xinjiang.These findings enhance our understanding of the genetic variation throughout the distribution range of J.regia in Central Asia,which will provide a key prerequisite for evidence-based conservation and management.展开更多
Dykes are a special kind of intrusive rocks which were formed by deep magma intruded into the existing brittle fractures in the crust.Dykes swarms in different tectonic environments are very significant to re-construc...Dykes are a special kind of intrusive rocks which were formed by deep magma intruded into the existing brittle fractures in the crust.Dykes swarms in different tectonic environments are very significant to re-construct the展开更多
With the economic integration all over the world, it is necessary to establish the free trade area of central Asia, including Xinjiang. This paper analyses the demands on establishing free trade area in central Asia. ...With the economic integration all over the world, it is necessary to establish the free trade area of central Asia, including Xinjiang. This paper analyses the demands on establishing free trade area in central Asia. According to the present statues of Xinjiang and five countries of central Asia, the developmental patterns are suggested. Furthermore, some policies and suggestions are proposed about the existing problems.展开更多
This study aims to contribute to the understanding of the evolution of art and construction in the early settlements established by Turkish communities on the far west Asian coast by focusing on two developed examples...This study aims to contribute to the understanding of the evolution of art and construction in the early settlements established by Turkish communities on the far west Asian coast by focusing on two developed examples in Urla Peninsula.Conventional surveying and evaluation techniques of architectural restoration and civil engineering were utilized.Key findings include the understanding of the hierarchy of rural settlements in the studied landscape:old C¸esme the most developed village of peninsula in the 16th century.It was positioned along a valley in distance to coast,but in control of harbor that played significant role in commerce between Europe and Asia.Its mosque and tomb,dated to late 14th e early 15th centuries,used to crown it.Cylindrical minaret tower of mosque,domed tomb tower on a cubical base and squinch in the transition zone of mosque are evidences for Central Asian roots.Usage of local lime stone,re-usage of andesite blocks,framing of the stone blocks with bricks,and pendentive in tomb refer to Roman-Byzantine constructions.The study presents the development of Turkish art and construction on the far west Asian coast in the 14th‒15th centuries.Findings will be a guide for related conservation management in similar contexts.展开更多
基金supported by grants from the National Natural Science Foundation of China(32170398,42211540718,32260149,41971071)the Top-notch Young Talents Project of Yunnan Provincial“Ten Thousand Talents Program”(YNWR-QNBJ-2018-146)+5 种基金CAS“Light ofWest China”Program,and Natural Science Foundation of Yunnan(202201AT070222)the Fund of Yunnan Key Laboratory of Crop Wild Relatives Omics(CWR-2024-04)the Jiangxi Provincial Natural Science Foundation(20224BAB215012)the Science and Technology Research Project of Jiangxi Provincial Department of Education(GJJ2202401)Key Research Program of Frontier Sciences,CAS(ZDBSLY-7001)Yunnan Fundamental Research Projects(202201BC070001).
文摘The common walnut(Juglans regia)is one of the most economically important nut trees cultivated worldwide.Despite its importance,no comprehensive evaluation of walnut tree population genetics has been undertaken across the range where it originated,Central Asia.In this study,we investigated the genetic diversity and population structure of 1082 individuals from 46 populations across Central Asia.We found moderate genetic diversity of J.regia across Central Asia,with 46 populations clustered into three groups with a weak relationship between genetic and geographic distance.Our findings reveal that the western Himalaya might be the core region of common walnut genetic diversity in Central Asia and that,except for two populations in Gongliu Wild Walnut Valley,humans might have introduced walnut populations to Xinjiang,China.The observed distribution of the genetic landscape has probably been affected by historical climate fluctuation,breeding system,and prolonged anthropogenic activity.We propose the conservation of the core genetic diversity resources in the western Himalaya and pay special attention to populations from Gongliu in Xinjiang.These findings enhance our understanding of the genetic variation throughout the distribution range of J.regia in Central Asia,which will provide a key prerequisite for evidence-based conservation and management.
基金co-supported by National Natural Science Foundation of China (Project number 41502201)"Western Light" project of Chinese Academy of Sciences (XBBS201301)
文摘Dykes are a special kind of intrusive rocks which were formed by deep magma intruded into the existing brittle fractures in the crust.Dykes swarms in different tectonic environments are very significant to re-construct the
文摘With the economic integration all over the world, it is necessary to establish the free trade area of central Asia, including Xinjiang. This paper analyses the demands on establishing free trade area in central Asia. According to the present statues of Xinjiang and five countries of central Asia, the developmental patterns are suggested. Furthermore, some policies and suggestions are proposed about the existing problems.
文摘This study aims to contribute to the understanding of the evolution of art and construction in the early settlements established by Turkish communities on the far west Asian coast by focusing on two developed examples in Urla Peninsula.Conventional surveying and evaluation techniques of architectural restoration and civil engineering were utilized.Key findings include the understanding of the hierarchy of rural settlements in the studied landscape:old C¸esme the most developed village of peninsula in the 16th century.It was positioned along a valley in distance to coast,but in control of harbor that played significant role in commerce between Europe and Asia.Its mosque and tomb,dated to late 14th e early 15th centuries,used to crown it.Cylindrical minaret tower of mosque,domed tomb tower on a cubical base and squinch in the transition zone of mosque are evidences for Central Asian roots.Usage of local lime stone,re-usage of andesite blocks,framing of the stone blocks with bricks,and pendentive in tomb refer to Roman-Byzantine constructions.The study presents the development of Turkish art and construction on the far west Asian coast in the 14th‒15th centuries.Findings will be a guide for related conservation management in similar contexts.
文摘中西太平洋热带海域是世界上最大的鲣(Katsuwonus pelamis)渔场。为合理开发和利用中西太平洋围网鲣自由鱼群的渔业资源,根据1995—2019年中西太平洋渔业委员会的围网鲣数据计算资源丰度指数,得出渔场重心,并结合海表温度(Sea surface temperature,SST)、海洋尼诺指数(Oceanic Niño Index,ONI)进行皮尔森相关性分析。结果显示,单位捕捞努力量渔获量(Catch per unit effort,CPUE)可用于表征自由鱼群渔场重心的资源丰度,且与暖池重心经度以及右边缘经度有显著相关性;渔场重心与暖池指标(暖池重心经度与右边缘经度)的相对位置以及变动趋势在不同气候模式下存在差异,而在同一气候模式中相同。结果表明,渔场重心可通过暖池重心的变化进行预测,而通过构建暖池场与自由鱼群资源丰度的时空分布关系发现,暖池右边缘能够与自由鱼群的空间分布产生联系,为商业性捕捞围网鲣自由鱼群提供渔场边界的指示,为其资源开发与养护提供科学依据。
