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Conservation genomics provides insights into genetic resilience and adaptation of the endangered Chinese hazelnut, Corylus chinensis

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Plant Diversity 2024年第3期46卷 294-308页

作者： Zhen Yang Lisong Liang Weibo Xiang Lujun Wang qinghua ma Zhaoshan Wang Key Laboratory of Tree Breeding and Cultivation National Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China National Engineering Research Center of Eco-Environment Protection for Yangtze River Economic Belt China Three Gorges CorporationBeijing 100083China Rare Plants Research Institute of Yangtze River China Three Gorges CorporationYichang 443133China Research Institute of Economic Forest Cultivation and Processing Anhui Academy of ForestryHefei 230031China

Global climate change has increased concerns regarding biodiversity ***,many key conservation issues still required further research,including demographic history,deleterious mutation load,adaptive evolution,and putative *** we generated the first chromosome-level genome of the endangered Chinese hazelnut,Corylus chinensis,and compared the genomic signatures with its sympatric widespread ***-C yunnanensis *** found large genome rearrangements across all Corylus species and identified species-specific expanded gene families that may be involved in *** genomics revealed that both *** and the *** complex had diverged into two genetic lineages,forming a consistent pattern of southwestern-northern *** size of the narrow southwestern lineages of both species have decreased continuously since the late Miocene,whereas the widespread northern lineages have remained stable(***) or have even recovered from population bottlenecks(*** complex) during the *** with ***-C. yunnanensis complex,*** showed significantly lower genomic diversity and higher inbreeding ***,*** carried significantly fewer deleterious mutations than ***-C. yunnanensis complex,as more effective purging selection reduced the accumulation of homozygous *** also detected signals of positive selection and adaptive introgression in different lineages,which facilitated the accumulation of favorable variants and formation of local ***,both types of selection and exogenous introgression could have mitigated inbreeding and facilitated survival and persistence of ***,our study provides critical insights into lineage differentiation,local adaptation,and the potential for future recovery of endangered trees.

关键词： Conservation genomics Demographic history Inbreeding Genetic load Runs of homozygosity Local adaptation

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Population genomics reveals demographic history and selection signatures of hazelnut (Corylus)

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Horticulture Research 2023年第5期10卷 247-259页

作者： Zhen Yang Wenxu ma Lujun Wang Xiaohong Yang Tiantian Zhao Lisong Liang Guixi Wang qinghua ma Key Laboratory of Tree Breeding and Cultivation National Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing100091China Forest Botany and Tree Physiology University of GoettingenGoettingen37077Germany Research Institute of Economic Forest Cultivation and Processing Anhui Academy of ForestryHefei230031China Research Institute of Walnut Guizhou Academy of ForestryGuiyang550005China

Hazelnut(Corylus spp.)is known as one of the four famous tree nuts in the world due to its pleasant taste and nutritional ***,hazelnut promotion worldwide is increasingly challenged by global climate change,limiting its production to a few *** on the eurytopic Section Phyllochlamys,we conducted whole-genome resequencing of 125 diverse accessions from five geo-ecological zones in Eurasia to elucidate the genomic basis of adaptation and *** structure inference outlined five distinct genetic lineages corresponding to climate conditions and breeding background,and highlighted the differentiation between European and Asian *** dynamics and ecological niche modeling revealed that Pleistocene climatic oscillations dominantly shaped the extant genetic patterns,and multiple environmental factors have contributed to the lineage ***-genome scans identified 279,111,and 164 selective sweeps that underlie local adaptation in Corylus heterophylla,Corylus kweichowensis,and Corylus yunnanensis,*** positively selected genes were mainly involved in regulating signaling pathways,growth and development,and stress *** improvement signatures of hybrid hazelnut were concentrated in 312 and 316 selected genes,when compared to *** and Corylus avellana,respectively,including those that regulate protein polymerization,photosynthesis,and response to water *** these loci,22 candidate genes were highly associated with the regulation of biological *** study provides insights into evolutionary processes and the molecular basis of how sibling species adapt to contrasting environments,and offers valuable resources for future climate-resilient breeding.

关键词： breeding Population signature

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Diversity analysis of space-time-frequency coded broadband MIMO-OFDM system with correlation across space time and frequency

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Frontiers of Electrical and Electronic Engineering in China 2008年第3期3卷 295-300页

作者： qinghua ma Luxi YANG Zhenya HE School of Information Science and Engineering Southeast UniversityNanjing 210096China

For the frequency selective and time variant multiple-input multiple-output(MIMO)channel model taking into account transmitting and receiving antenna correlation,the diversity of space-time-frequency coded broadband orthogonal frequency division multiplexing(MIMO-OFDM)system is *** on the average pairwise error probability(PEP),the design criterion of space-time-frequency code(STFC)is *** a given STFC,it is found that the achievable diversity order is related to the transmitter and the receiver correlation matrix as well as the time correlation and frequency correlation *** maximum available diversity of STFC over the correlation channel is Lrank(P)rank(Q)rank(RT).The space-time code and space-frequency code are special cases in our *** results validate the findings.

关键词： diversity multiple-input multiple-output(MIMO) orthogonal frequency division multiplexing pairwise error probability space-time-frequency coding

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Molecular cloning,expression pattern and phylogenetic analysis of Guanine nucleotide exchange factor Vav2 in lamprey,Lampetra japonica

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Acta Oceanologica Sinica 2017年第12期36卷 24-30页

作者： HAN Yinglun LI Jun XU Lei ma qinghua GOU Meng PANG Yue LIU Xin LI Qingwei College of Life Science Liaoning Normal UniversityDalian 116029China Lamprey Research Center Liaoning Normal UniversityDalian 116029China Freshwater Fisheries Sciences Institute of Liaoning Province Liaoyang 111000China

The Guanine nucleotide exchange factor Vav2（Vav2） is a member of the Vav family that serves as an important regulators for the Rho family of Ras-related GTPases. In the current study, an ortholog（Lj-Vav2） of Vav2 was identified in the lamprey（Lampetra japonica）. To elucidate the phylogenetic relationship of Vav2, the metazoan genome databases were analyzed to mine the ortholog of Vav. It was found that Vav2 genes were only existed in vertebrates and Lj-Vav2 was the original one found in agnathans. The evolutionary dynamics of conserved motifs of Vav2 were explored using combined amino acid sequence as markers, and it is revealed that the Calponin homology（CH） domain, Dbl-homologous（DH） domain, Pleckstrin homology（PH） domain, Cysteine-rich（C1）domains, Src homology 3（SH3） domains and Src homology 2（SH2） domain were conserved throughout the Vav2 gene family in vertebrates during gene evolution. Relative quantitative real-time PCR analysis showed that the LjVav2 was distributed in the heart, kidney, supraneural myeloid body, liver, gill and lymphocyte-like cells. The LjVav2 was found to be expressed in these tissues, and the level of which was upregulated in lymphocyte-like cells after the animal was stimulated with LPS. These results indicated that the Lj-Vav2 might be involved in the immune response of lymphocyte-like cells in lamprey. Meanwhile, our findings provided a foundation for further investigation of the function of Lj-Vav2 in the primary vertebrate.

关键词： guanine nucleotide exchange factor Vav2 Lampetra japonica phylogenetic relationship molecular cloning

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The Significance of Onomatopoeia in Languagization： From the perspective of sound-meaning relationship under dynamic system principle

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宏观语言学 2018年第1期6卷 43-62页

作者： ma qinghua Nanjing University China

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The Path of Grammaticalization for Coordinate Conjunctions and its Universality

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宏观语言学 2007年第1期1卷 82-103页

作者： ma qinghua Institute for International Students Nanjing University Nanjing 210093 China

From the study of polysemy of coordinate conjunctions, it can be found that there are grammaticalization processes from coordination to transition and from coordination to succession. It is a general evolutionary process in connective structures to go from non-specific semantic relationship to specific semantic relationship. This was caused by the cognitive tendency of approximately substituting typical functions for atypical functions.

关键词： Conjunction coordination transition succession grammaticalization universality

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On the Modeling and Development of Verb-object Construction from the Oracle Bone inscriptions to Jinwen Shangshu

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宏观语言学 2017年第2期5卷 1-37页

作者： ma qinghua Li Weizheng Naxljing University China Nanchang Normal University China

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Compensation：A Synchronic Dynamic Mechanism in Language

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宏观语言学 2008年第1期2卷 14-37页

作者： ma qinghua Wang Zhiguang School of Liberal Arts Nanjing University Nanjing 210093 China. School of Foreign Languages Zhejiang University Hangzhou 310058 China

In this paper, compensation mechanism—a synchronic dynamic rule in language is postulated and theorized. The rule raises the acceptability of clauses by effecting the positive side of some variations with exceptional expression and offsetting their negative side. This mechanism is determined by the instrumentality and systematicality of language so that its basic principle should be applicable to all exceptional expressions for particular positive effects and thus universal synchronically.

关键词： compensation synchronic dynamic mechanism acceptability

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The Determinacy of Lexical Selectional Restriction and Its Basis for Existence

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宏观语言学 2016年第1期4卷 17-36页

作者： ma qinghua Huang Yanqun Nanjing University China Hangzhou Dianzi University China

In this paper, the determinacy of regular lexical selectional restrictions is examined from both the internal structures of the single selectional restrictions (*** selectional restrictions) and relationship between the structures of several selectional restrictions. Hence, our analysis and description are shifted from casual and indeterminate strings and markers on case basis to determined rules and circumspect dynamic systems, from lexical precepts to knowledge precepts, from the state of memory to rational deduction and rhetorical devices. Further studies indicate that selectional restrictions are intertwined structures, a feature that makes it possible to be one of the bases for lexical selectional restrictions to come into existence. Its related theories are the grarantee for scientific observations of selectional restriction structures.

关键词： lexical selectional restriction determinacy intertwine basis for existence

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What Is Language Complexity?

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宏观语言学 2019年第2期7卷 1-29页

作者： ma qinghua Wang Xinxin Qi Shan Nanjing University China Nanjing Tech University China School of Foreign Studies Nanjing University

On the basis of complex system theory and the frontier researches of Chinese and foreign linguistics in this field,this paper systematically discusses the conceptual connotation of language complexity,and generalizes the essential characteristics in quality and quantity,which is non-linearity and high organizational *** non-linearity is mainly manifested as imbalance,emergence and interactivity,while the high organizational depth as multi-level,multi-dimension,multi-stage,high cardinality,*** speaking,the more complex the information is,the longer the minimum description length(MDL)of it is,and the higher resource/cost consumption *** the relation of unity of opposites between complexity and simplicity,language complexity is absolute,while simplicity is *** is always in dominance,while simplicity always serves as a lever to balance,control and regulate *** are developing nonlinear adaptive interactions,which leads to the formation and development of linguistic paradigm system(such as grammatical paradigm and rhetorical paradigm).The conclusion provides a theoretical basis for the study of language complexity.

关键词： language paradigm complexity non-linearity high organizational depth highcardinality simplicity

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