scholarly journals Research Progress on Iron-Heart Cunninghamia lanceolate

2021 ◽  
Author(s):  
Ninghua Zhu ◽  
Xiaowei Yang ◽  
Zhiqiang Han ◽  
Xiao Can
Keyword(s):  
Genetic Structure ◽  
Seed Quality ◽  
Southern China ◽  
Hunan Province ◽  
Research Progress ◽  
Germplasm Resources ◽  
History Of ◽  
Plus Tree ◽  
Development And Utilization ◽  
Cunninghamia Lanceolate

Cunninghamia lanceolate (Lambert.) Hooker is one of the main fast-growing timber forest species in southern China which has a long history of cultivation and spreads across 28 provinces, cities, and regions. Recently, a variant of fir was discovered in the Xiaoxi National Nature Reserve in Hunan Province. The heartwood is hard as iron and its ratio is more than 80%, with the especial character of anti-corruption. It is a natural germplasm resource, called Iron-heart Cunninghamia lanceolate. Study on it is still in the stage of data accumulation. In this paper, we studied it from three points as follows: (1) Plus tree selection and construction of germplasm resources nursery. (2) Study on cone and seed quality. (3) Genetic structure analysis of natural population. The research of Iron-heart Cunninghamia lanceolate lays a theoretical foundation for the protection, development, and utilization of the black-heart wood germplasm resources of Iron-heart Cunninghamia lanceolate in the future.

scholarly journals Research Progress on Chinese Silkworm Germplasm Resources and Variety Breeding

2020 ◽  
pp. 1-11
Keyword(s):  
Gene Mutation ◽  
Artificial Selection ◽  
Research Progress ◽  
Germplasm Resources ◽  
Near Isogenic Lines ◽  
Local Varieties ◽  
Republic Of China ◽  
Research And Teaching ◽  
History Of

As the birthplace of the world’s sericulture and the original center of silkworms, China has a long history of silkworm breeding and widely distributed sericultural areas. After long- term artificial selection and natural elimination, silkworm varieties have been differentiated and multiplied, making China abundant in silkworm germplasm resources. We have summarized the research actualities of Chinese silkworm germplasm resources as follows: at present, there are more than 4,500 silkworm germplasm resources, which are stored in 32 scientific research and teaching institutions in 27 provinces and cities of China. The resources fall into several major categories, under which are local varieties, improved varieties, imported varieties, multivoltine varieties, germplasm innovation materials and basic materials, gene mutation systems, tester strains and near-isogenic lines. By use of various germplasm resources, the People’s Republic of China had bred 204 new silkworm varieties by 2010 since its founding. According to usage, these resources are divided into 103 varieties for spring rearing and spring-autumn rearing, 85 varieties for summer-autumn rearing and 16 varieties for specialpurpose rearing. Some of these varieties were as transient as a fleeting cloud, whereas some others have become classics and made outstanding contributions to the development of China’s sericulture.

scholarly journals Research Progress of the Wild Medicinal Plant, Pinellia ternata

2021 ◽  
Vol 5 (4) ◽  
pp. 12-16
Author(s):  
Xu Ding ◽  
Quanhua Song ◽  
Wei Hu
Keyword(s):  
Tissue Culture ◽  
Research Progress ◽  
Regulation Mechanism ◽  
Germplasm Resources ◽  
Active Components ◽  
Pinellia Ternata ◽  
Literature Reviews ◽  
Wild Resources ◽  
Development And Utilization ◽  
Growing Environment

Based on literature reviews and analysis of research reports on Pinellia ternata found locally and abroad in recent years, this article summarizes and arranges them. The research on Pinellia ternata mainly focuses on its cultivation, tissue culture, and so on. There are only a few research on its active components and its regulation mechanism. The wild resources of Pinellia ternata are gradually decreasing, hence it is urgent to take effective measures to protect these wild resources as well as to establish germplasm resources bank and nursery. In order to meet the needs of the domestic market, it is necessary to investigate the distribution of wild Pinellia ternata resources, explore the best growing environment and conditions, artificially cultivate Pinellia ternata, as well as implement resource industrialization, sustainable development, and utilization.

scholarly journals Inland-coastal bifurcation of southern East Asians revealed by Hmong-Mien genomic history

2019 ◽  
Author(s):  
Zi-Yang Xia ◽  
Shi Yan ◽  
Chuan-Chao Wang ◽  
Hong-Xiang Zheng ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Southern China ◽  
Temporal Distribution ◽  
Central China ◽  
Hunan Province ◽  
Before Present ◽  
East Asians ◽  
Southeast Asians ◽  
Founding Population ◽  
History Of ◽  
Asian Lineage

ABSTRACTThe early history of the Hmong-Mien language family and its speakers is elusive. A good variety of Hmong-Mien-speaking groups distribute in Central China. Here, we report 903 high-resolution Y-chromosomal, 624 full-sequencing mitochondrial, and 415 autosomal samples from 20 populations in Central China, mainly Húnán Province. We identify an autosomal component which is commonly seen in all the Hmong-Mien-speaking populations, with nearly unmixed composition in Pahng. In contrast, Hmong and Mien respectively demonstrate additional genomic affinity to Tibeto-Burman and Kra-Dai speakers. We also discover two prevalent uniparental lineages of Hmong-Mien speakers. Y-chromosomal haplogroup O2a2a1b1a1b-N5 diverged ∼2,330 years before present (BP), approximately coinciding with the estimated time of Proto-Hmong-Mien (∼2,500 BP), whereas mitochondrial haplogroup B5a1c1a significantly correlates with Pahng and Mien. All the evidence indicates a founding population substantially contributing to present-day Hmong-Mien speakers. Consistent with the two distinct routes of agricultural expansion from southern China, this Hmong-Mien founding ancestry is phylogenetically closer to the founding ancestry of Neolithic Mainland Southeast Asians and present-day isolated Austroasiatic-speaking populations than Austronesians. The spatial and temporal distribution of the southern East Asian lineage is also compatible with the scenario of out-of-southern-China farming dispersal. Thus, our finding reveals an inland-coastal genetic discrepancy related to the farming pioneers in southern China and supports an inland southern China origin of an ancestral meta-population contributing to both Hmong-Mien and Austroasiatic speakers.

Vernacular Capitalism and Intellectual History in a Gujarati Account of China, 1860–68

2021 ◽  
pp. 1-26
Author(s):  
Michael O'Sullivan
Keyword(s):  
South China Sea ◽  
Intellectual History ◽  
Southern China ◽  
Western Indian Ocean ◽  
Port Cities ◽  
Late Qing ◽  
Modern Capitalism ◽  
Late Qing China ◽  
History Of ◽  
The Many

This article examines one of the earliest Gujarati travelogues concerning China, written by Damodar Ishwardas—a Hindu resident of Bombay and a clerk for a Sunni Khoja commercial firm—and published in Bombay in 1868. Based on a three-year trip to the port cities of southern China, Ishwardas's text runs close to 400 pages and was patronized by a prominent stratum of Bombay's Gujarati-speaking commercial and bureaucratic elite. The primary intervention in this article is to analyze Ishwardas's account as a neglected relic of vernacular capitalism and vernacular intellectual history. Furthermore, the text presents an opportunity to reexamine the history of the Indian intellectual and mercantile engagement with late Qing China, especially before anticolonial nationalism and pan-Asianism supplied new paradigms for Indian writing on East Asia beginning around 1900. It further points to the many unstudied Indian materials that have yet to be integrated into the study of modern capitalism in the regions from the South China Sea to the western Indian Ocean.

Genetic variability and demographic history of Heliothis virescens (Lepidoptera: Noctuidae) populations from Brazil inferred by mtDNA sequences

2011 ◽  
Vol 102 (3) ◽  
pp. 333-343 ◽  
Author(s):  
K.C. Albernaz ◽  
K.L. Silva-Brandão ◽  
P. Fresia ◽  
F.L. Cônsoli ◽  
C. Omoto
Keyword(s):  
Genetic Structure ◽  
Genetic Variability ◽  
Heliothis Virescens ◽  
Demographic History ◽  
Haplotype Diversity ◽  
Low Frequency ◽  
Haplotype Network ◽  
Demographic Expansion ◽  
Significant Genetic Structure ◽  
History Of

AbstractIntra- and inter-population genetic variability and the demographic history of Heliothis virescens (F.) populations were evaluated by using mtDNA markers (coxI, coxII and nad6) with samples from the major cotton- and soybean-producing regions in Brazil in the growing seasons 2007/08, 2008/09 and 2009/10. AMOVA indicated low and non-significant genetic structure, regardless of geographical scale, growing season or crop, with most of genetic variation occurring within populations. Clustering analyzes also indicated low genetic differentiation. The haplotype network obtained with combined datasets resulted in 35 haplotypes, with 28 exclusive occurrences, four of them sampled only from soybean fields. The minimum spanning network showed star-shaped structures typical of populations that underwent a recent demographic expansion. The recent expansion was supported by other demographic analyzes, such as the Bayesian skyline plot, the unimodal distribution of paired differences among mitochondrial sequences, and negative and significant values of neutrality tests for the Tajima's D and Fu's FS parameters. In addition, high values of haplotype diversity (Ĥ) and low values of nucleotide diversity (π), combined with a high number of low frequency haplotypes and values of θπ<θW, suggested a recent demographic expansion of H. virescens populations in Brazil. This demographic event could be responsible for the low genetic structure currently found; however, haplotypes present uniquely at the same geographic regions and from one specific host plant suggest an initial differentiation among H. virescens populations within Brazil.

scholarly journals Population Genetic Structure and Colonisation History of the Tool-Using New Caledonian Crow

PLoS ONE ◽  
2012 ◽  
Vol 7 (5) ◽  
pp. e36608 ◽  
Author(s):  
Jawad Abdelkrim ◽  
Gavin R. Hunt ◽  
Russell D. Gray ◽  
Neil J. Gemmell
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
New Caledonian Crow ◽  
Caledonian Crow ◽  
History Of

The Peach Blossom Spring’s Long History as a Sacred Site in Northern Hunan

T oung Pao ◽  
2021 ◽  
Vol 107 (1-2) ◽  
pp. 1-39
Author(s):  
Mark Meulenbeld
Keyword(s):  
Religious Studies ◽  
Sixth Century ◽  
Hunan Province ◽  
Literary Canon ◽  
Sacred Site ◽  
History Of ◽  
A Site ◽  
Tao Qian

Abstract Though long seen uniquely from the perspective of the Chinese literary canon, Tao Qian’s 陶潛 (365?–427) famous “Record of the Peach Blossom Spring” (“Taohuayuan ji” 桃花源記) may find an even more fruitful disciplinary home in religious studies. The story refers itself to a grotto at Wuling 武陵 (present-day northern Hunan province), a site that has been associated with Daoist transcendents (shenxian 神仙) at least since the middle of the sixth century. A Daoist monastery on that same site, the Peach Spring Abbey (Taoyuan guan 桃源觀) or Peach Blossom Abbey (Taohua guan 桃花觀), became officially recognized in 748 and received imperial support not long after. This article studies the long history of Peach Spring as a sacred site, or, as Tao Qian referred to it in his poem, a “divine realm” (shenjie 神界).

Genetic structure and population history of wintering Asian Great Bustard (Otis tarda dybowskii) in China: implications for conservation

2017 ◽  
Vol 158 (3) ◽  
pp. 761-772 ◽  
Author(s):  
Gang Liu ◽  
Xiaolong Hu ◽  
Aaron B. A. Shafer ◽  
Minghao Gong ◽  
Morigen Han ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Population History ◽  
Great Bustard ◽  
Otis Tarda ◽  
History Of
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