Walnut (Juglans spp.) genetic diversity determined by restriction fragment length polymorphisms

The genetic diversity of 13 Juglans species was characterized using nuclear RFLPs. Allelic frequencies among 41 Juglans populations were determined at 19 RFLP loci by hybridizing single locus probes to walnut DNAs digested with the restriction endonuclease EcoRI or HindIII. A 10-fold difference in species heterozygosity levels was seen among species in different sections of the genus. Differentiation among conspecific populations varied over threefold between species. Genetic differentiation among conspecific east Asian populations was larger than that seen among east Asian species, while the opposite trend was seen for Western Hemisphere species. Taxonomic affinities were also indicated by these results, suggesting that J. cinerea should be included as part of section Cardiocaryon rather than as a unique section, Trachycaryon. Juglans hindsii is classified as a distinct species and not a subspecies of J. californica. Strategies for germplasm preservation and species requiring marked collection efforts are given.Key words: Juglans, RFLP, genetic diversity, walnut.

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Genetic studies of human diversity in East Asia

Philosophical Transactions of the Royal Society B Biological Sciences ◽

10.1098/rstb.2007.2028 ◽

2007 ◽

Vol 362 (1482) ◽

pp. 987-996 ◽

Cited By ~ 50

Author(s):

Feng Zhang ◽

Bing Su ◽

Ya-ping Zhang ◽

Li Jin

Keyword(s):

Genetic Diversity ◽

Gene Flow ◽

East Asia ◽

Pacific Islands ◽

East Asian ◽

Human Populations ◽

Genetic Studies ◽

The North ◽

Asian Populations ◽

Genetic Diversity And Structure

East Asia is one of the most important regions for studying evolution and genetic diversity of human populations. Recognizing the relevance of characterizing the genetic diversity and structure of East Asian populations for understanding their genetic history and designing and interpreting genetic studies of human diseases, in recent years researchers in China have made substantial efforts to collect samples and generate data especially for markers on Y chromosomes and mtDNA. The hallmark of these efforts is the discovery and confirmation of consistent distinction between northern and southern East Asian populations at genetic markers across the genome. With the confirmation of an African origin for East Asian populations and the observation of a dominating impact of the gene flow entering East Asia from the south in early human settlement, interpretation of the north–south division in this context poses the challenge to the field. Other areas of interest that have been studied include the gene flow between East Asia and its neighbouring regions (i.e. Central Asia, the Sub-continent, America and the Pacific Islands), the origin of Sino-Tibetan populations and expansion of the Chinese.

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Population genomics of East Asian ethnic groups

Hereditas ◽

10.1186/s41065-020-00162-w ◽

2020 ◽

Vol 157 (1) ◽

Author(s):

Ziqing Pan ◽

Shuhua Xu

Keyword(s):

Genetic Diversity ◽

East Asia ◽

Ethnic Groups ◽

Population Genomics ◽

Sequence Data ◽

East Asian ◽

Whole Genome Sequence ◽

Whole Genome ◽

Evolutionary Forces ◽

Asian Populations

AbstractEast Asia constitutes one-fifth of the global population and exhibits substantial genetic diversity. However, genetic investigations on populations in this region have been largely under-represented compared with European populations. Nonetheless, the last decade has seen considerable efforts and progress in genome-wide genotyping and whole-genome sequencing of the East-Asian ethnic groups. Here, we review the recent studies in terms of ancestral origin, population relationship, genetic differentiation, and admixture of major East- Asian groups, such as the Chinese, Korean, and Japanese populations. We mainly focus on insights from the whole-genome sequence data and also include the recent progress based on mitochondrial DNA (mtDNA) and Y chromosome data. We further discuss the evolutionary forces driving genetic diversity in East-Asian populations, and provide our perspectives for future directions on population genetics studies, particularly on underrepresented indigenous groups in East Asia.

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228 DIVERSITY AND PHYLOGENETIC RELATIONSHIPS OF JUGLANS SPECIES DETERMINED FROM NUCLEAR DNA RFLP ANALYSIS

HortScience ◽

10.21273/hortsci.29.5.462b ◽

1994 ◽

Vol 29 (5) ◽

pp. 462b-462

Author(s):

Robert G. Fjellstrom ◽

Dan E. Parfitt

Keyword(s):

Phylogenetic Relationships ◽

Nuclear Dna ◽

East Asian ◽

Rflp Analysis ◽

Distinct Species ◽

Genetic Distances ◽

Parsimony Analysis ◽

Asian Populations ◽

Phylogenetic Resolution ◽

Distance Data

RFLPs were studied in 41 populations of 13 Juglans species to study genetic diversity and phylogenetic relationships. 19 single locus nuclear RFLP loci were used to generate genetic distance/identity matrices based on allele frequencies. 21 probes were used to generate genetic distances and phylograms using shared-fragments with parsimony analysis. Parsimony analysis on fragment data produced a minimal length tree in general agreement with distance data trees, but with additional phylogenetic resolution resembling previous systematic studies. All analyses indicate an ancient origin of J. regia, which has been considered a recently derived species. A 10x difference in heterozygosity was seen among species. Genetic differentiation among conspecific east Asian populations was larger than among east Asian species. The opposite was true for American species. J. hindsii is classified as a distinct species and J. cinerea was included in section Cardiocaryon rather than Trachycaryon, from the diversity analysis.

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EvoSNP-DB: A database of genetic diversity in East Asian populations

BMB Reports ◽

10.5483/bmbrep.2013.46.8.191 ◽

2013 ◽

Vol 46 (8) ◽

pp. 416-421 ◽

Cited By ~ 1

Author(s):

Young Uk Kim ◽

Young Jin Kim ◽

Jong-Young Lee ◽

Kiejung Park

Keyword(s):

Genetic Diversity ◽

East Asian ◽

Asian Populations

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Genetic Diversity and Population Structure in East Asian Populations of Plantago asiatica

Journal of Life Science ◽

10.5352/jls.2013.23.6.728 ◽

2013 ◽

Vol 23 (6) ◽

pp. 728-735 ◽

Cited By ~ 1

Author(s):

Man Kyu Huh

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

East Asian ◽

Asian Populations ◽

Plantago Asiatica

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1188-P: Glycemic Efficacy of Sitagliptin in East Asian Populations: A Pooled Analysis

Diabetes ◽

10.2337/db19-1188-p ◽

2019 ◽

Vol 68 (Supplement 1) ◽

pp. 1188-P

Author(s):

JOAO M. CONCEICAO ◽

CLAUDIO D. GONZALEZ ◽

SAMUEL S. ENGEL ◽

JONGHO AHN ◽

SHIGERU TOKITA ◽

...

Keyword(s):

East Asian ◽

Pooled Analysis ◽

Asian Populations

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Complications of Asian Double Eyelid Surgery: Prevention and Management

Facial Plastic Surgery ◽

10.1055/s-0040-1717147 ◽

2020 ◽

Vol 36 (05) ◽

pp. 592-601

Author(s):

Stephanie Ming Young ◽

Yoon-Duck Kim

Keyword(s):

East Asian ◽

Eyelid Surgery ◽

Patient Dissatisfaction ◽

Optimal Outcomes ◽

Asian Populations ◽

Underlying Causes ◽

Double Eyelid

AbstractDouble eyelid surgery remains one of the most popular aesthetic surgeries, especially among East Asian populations. Complications related to double eyelid surgery can be divided into various categories: (1) patient dissatisfaction, (2) problems with the eyelid crease, (3) problems with the eyelid height, (4) suture-related complications, and (5) complications related to eyelid surgery in general. As with all eyelid surgeries, it is important to understand and appreciate the normal and abnormal function and anatomy of the Asian eyelid to reduce the risk of complications. It is also important to recognize the various complications and their underlying causes so that the surgeon can confidently revise the surgery to achieve optimal outcomes.

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