Abstract:
:Understanding the processes that cause speciation is a key aim of evolutionary biology. Lineages or biomes that exhibit recent and rapid diversification are ideal model systems for determining these processes. Species rich biomes reported to be of relatively recent origin, i.e., since the beginning of the Miocene, include Mediterranean ecosystems such as the California Floristic Province, oceanic islands such as the Hawaiian archipelago and the Neotropical high elevation ecosystem of the Páramos. Páramos constitute grasslands above the forest tree-line (at elevations of c. 2800-4700 m) with high species endemism. Organisms that occupy this ecosystem are a likely product of unique adaptations to an extreme environment that evolved during the last three to five million years when the Andes reached an altitude that was capable of sustaining this type of vegetation. We compared net diversification rates of lineages in fast evolving biomes using 73 dated molecular phylogenies. Based on our sample, we demonstrate that average net diversification rates of Páramo plant lineages are faster than those of other reportedly fast evolving hotspots and that the faster evolving lineages are more likely to be found in Páramos than the other hotspots. Páramos therefore represent the ideal model system for studying diversification processes. Most of the speciation events that we observed in the Páramos (144 out of 177) occurred during the Pleistocene possibly due to the effects of species range contraction and expansion that may have resulted from the well-documented climatic changes during that period. Understanding these effects will assist with efforts to determine how future climatic changes will impact plant populations.
journal_name
Front Genetjournal_title
Frontiers in geneticsauthors
Madriñán S,Cortés AJ,Richardson JEdoi
10.3389/fgene.2013.00192subject
Has Abstractpub_date
2013-10-09 00:00:00pages
192issn
1664-8021journal_volume
4pub_type
杂志文章,评审abstract::Hematopoiesis results in the correct formation of all the different blood cell types. In mammals, it starts from specific hematopoietic stem and precursor cells residing in the bone marrow. Mature blood cells are responsible for supplying oxygen to every cell of the organism and for the protection against pathogens. T...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2018.00348
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abstract::Using genomic information, local ruminant populations can be better characterized and compared to selected ones. Genetic relationships between animals can be established even without systematic pedigree recording, provided a budget is available for genotyping. Genomic selection (GS) can rely on a subset of the total p...
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pub_type: 杂志文章,评审
doi:10.3389/fgene.2018.00251
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abstract::The timing of the transition to flowering is carefully controlled by plants in order to optimize sexual reproduction and the ensuing production of seeds, grains, and fruits. The genetic networks that regulate floral induction are best characterized in the temperate eudicot Arabidopsis in which the florigen gene FT pla...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2015.00050
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2014.00351
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abstract::Sertoli cells are central and essential coordinators of spermatogenesis. Accumulating evidence has demonstrated that miRNAs participate in the regulation of Sertoli cell growth. However, the functions and the regulatory mechanisms of miRNAs in Sertoli cells of domestic animals remain largely unknown. Here we report th...
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abstract::Autism spectrum disorder (ASD) is marked by a strong genetic heterogeneity, which is underlined by the low overlap between ASD risk gene lists proposed in different studies. In this context, molecular networks can be used to analyze the results of several genome-wide studies in order to underline those network regions...
journal_title:Frontiers in genetics
pub_type: 杂志文章
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2018.00619
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pub_type: 杂志文章
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.00721
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pub_type: 杂志文章
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更新日期:2012-08-29 00:00:00
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.00594
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abstract::Cell viability and gene expression profiles are altered in cellular models of neurodegenerative disorders such as Huntington's Disease (HD). Using the yeast model system, we show that the SUMO-targeted ubiquitin ligase (STUbL) Slx5 reduces the toxicity and abnormal transcriptional activity associated with a mutant, ag...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2018.00379
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abstract::Livestock conservation practice is changing rapidly in light of policy developments, climate change and diversifying market demands. The last decade has seen a step change in technology and analytical approaches available to define, manage and conserve Farm Animal Genomic Resources (FAnGR). However, these rapid change...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2015.00314
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2014.00233
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2013.00105
更新日期:2013-06-11 00:00:00
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journal_title:Frontiers in genetics
pub_type: 杂志文章
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.01208
更新日期:2019-12-04 00:00:00
abstract::The factors behind genome size evolution have been of great interest, considering that eukaryotic genomes vary in size by more than three orders of magnitude. Using a model of two wild peanut relatives, Arachis duranensis and Arachis ipaensis, in which one genome experienced large rearrangements, we find that the main...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2018.00454
更新日期:2018-10-09 00:00:00
abstract::Filet quality traits determine consumer satisfaction and affect profitability of the aquaculture industry. Soft flesh is a criterion for fish filet downgrades, resulting in loss of value. Filet firmness is influenced by many factors, including rate of protein turnover. A 50K transcribed gene SNP chip was used to genot...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.00386
更新日期:2019-05-03 00:00:00
abstract::Proliferation and differentiation of preadipocyte are essential for the formation of fat tissues. However, the genes that regulate the early stage of preadipocyte differentiation in chicken have remained elusive. Here we identify a novel spliced variant of the DNA methyltransferase Dnmt3a gene, named Dnmt3a3, that con...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.00115
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abstract::Parent-of-origin effects (POE) such as genomic imprinting influence growth and body composition in livestock, rodents, and humans. Here, we report the results of a genome scan to detect quantitative trait loci (QTL) with POE on growth and carcass traits in Angus × Brahman cattle crossbreds. We identified 24 POE-QTL on...
journal_title:Frontiers in genetics
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.01052
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journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2018.00623
更新日期:2019-01-21 00:00:00
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2018.00045
更新日期:2018-02-27 00:00:00
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.00776
更新日期:2019-09-05 00:00:00
abstract::Background:NKX2-1 related disorders (also known as brain-lung-thyroid syndrome or benign hereditary chorea 1) are associated with a wide spectrum of symptoms. The core features are various movement disorders, characteristically chorea, less frequently myoclonus, dystonia, ataxia; thyroid disease; and lung involvement....
journal_title:Frontiers in genetics
pub_type:
doi:10.3389/fgene.2018.00335
更新日期:2018-08-22 00:00:00
abstract::Rheumatoid arthritis (RA) is a systemic autoimmune disease that affects about 1% of the world's population. The etiology of RA remains unknown. It is considered to occur in the presence of genetic and environmental factors. An increasing body of evidence pinpoints that epigenetic modifications play an important role i...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2019.00570
更新日期:2019-06-14 00:00:00
abstract::Organ size and architecture of plants are important traits affecting crop yield and agronomic practices. An induced mutant, multiple-organ gigantism (MOG), of black gram (Vigna mungo) has been obtained, which shows gigantic leaves, fruit, seed, and architecture (plant height) but lower number of pods per plant. These ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.00635
更新日期:2020-06-30 00:00:00
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journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2018.00557
更新日期:2018-11-20 00:00:00
abstract::With the gradual development of intelligence, human got curious to know his origin and evolutionary background. Historical statements and anthropological findings were his primary tool for solving the puzzles of his own origin, until came the golden era of molecular markers which took no time to prove it's excellence ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2013.00155
更新日期:2013-08-09 00:00:00