Genetic diversity in endangered Notopterygium forbesii Boissieu based on intraspecies sequence variation of chloroplast DNA and implications for conservation

AbstractTo clarify the phytogeography of Prunus armeniaca L., two chloroplast DNA fragments (trnL-trnF and ycf1) and the nuclear ribosomal DNA internal transcribed spacer (ITS) were employed to assess genetic variation across 12 P. armeniaca populations. The results of cpDNA and ITS sequence data analysis showed a high the level of genetic diversity (cpDNA: HT = 0.499; ITS: HT = 0.876) and a low level of genetic differentiation (cpDNA: FST = 0.1628; ITS: FST = 0.0297) in P. armeniaca. Analysis of molecular variance (AMOVA) revealed that most of the genetic variation in P. armeniaca occurred among individuals within populations. The value of interpopulation differentiation (NST) was significantly higher than the number of substitution types (GST), indicating genealogical structure in P. armeniaca. P. armeniaca shared genotypes with related species and may be associated with them through continuous and extensive gene flow. The haplotypes/genotypes of cultivated apricot populations in Xinjiang, North China, and foreign apricot populations were mixed with large numbers of haplotypes/genotypes of wild apricot populations from the Ili River Valley. The wild apricot populations in the Ili River Valley contained the ancestral haplotypes/genotypes with the highest genetic diversity and were located in an area considered a potential glacial refugium for P. armeniaca. Since population expansion occurred 16.53 kyr ago, the area has provided a suitable climate for the population and protected the genetic diversity of P. armeniaca.

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Population genetic structure, phylogeography, and demographic history ofPlatycrater arguta (Hydrangeaceae) endemic to East China and South Japan, inferred from chloroplast DNA sequence variation

Taxon ◽

10.1002/tax.584014 ◽

2009 ◽

Vol 58 (4) ◽

pp. 1226-1241 ◽

Cited By ~ 28

Author(s):

Ying-Xiong Q Iu ◽

Xin-Shuai Qi ◽

Xiao-Feng Jin ◽

Xiao-Yu Tao ◽

Cheng-Xing Fu ◽

...

Keyword(s):

Genetic Structure ◽

Chloroplast Dna ◽

Dna Sequence ◽

Population Genetic Structure ◽

Population Genetic ◽

Sequence Variation ◽

Demographic History ◽

East China ◽

Dna Sequence Variation

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Seed Adaptive Traits of Fagus sylvatica Populations in Northeastern Greece

Forest Science ◽

10.1093/forsci/fxaa003 ◽

2020 ◽

Vol 66 (4) ◽

pp. 403-415

Author(s):

Georgios Varsamis ◽

Theodora Merou ◽

Ioannis Takos ◽

Chrisovalantis Malesios ◽

Apostolos Manolis ◽

...

Keyword(s):

Climate Change ◽

Genetic Diversity ◽

Chloroplast Dna ◽

Fagus Sylvatica ◽

Environmental Conditions ◽

Dna Markers ◽

Spatial Scales ◽

Adaptation Strategies ◽

Adaptive Traits ◽

Chloroplast Dna Markers

Abstract Fagus sylvatica in Europe is expected to be severely affected by the ongoing climate change. In this article, seed adaptive traits, in terms of morphology and germination, of F. sylvatica populations of different postglacial lineage and intrapopulation genetic diversity were evaluated. Eight plots from two geographical provenances, Evros and Drama, were selected. Provenance shaped both morphology and germination patterns, but the effect was more pronounced on germination. Seeds from Drama were larger and heavier than those from Evros but exhibited a higher degree of dormancy and slower germination. High among-plots variability on morphology and germination was also observed, especially in Evros. This higher variability was consistent with the higher level of genetic diversity observed at genomic and chloroplast DNA markers at small or larger spatial scales from previous published studies on the same plots. Results suggested the existence of different seed adaptation strategies, mainly between provenances, as a result of possible adaptation to different environmental conditions, whereas a possible influence of a generally complex pattern of admixture between different beech subspecies and postglacial lineages could not be excluded.

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