Genetic Diversity Current Events

Genetic Diversity Current Events, Genetic Diversity News Articles.
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Don't focus on genetic diversity to save our species
Scientists at the University of Adelaide have challenged the common assumption that genetic diversity of a species is a key indicator of extinction risk. Published in the journal PNAS, the scientists demonstrate that there is no simple relationship between genetic diversity and species survival. But, Dr João Teixeira and Dr Christian Huber from the University of Adelaide's School of Biological Sciences conclude, the focus shouldn't be on genetic diversity anyway, it should be on habitat protection. (2021-02-22)

Counting underwater vital for marine conservation
Understanding how genetic diversity occurs within species is paramount for conservation, according to University of Queensland scientists. The new research by UQ biologists has identified regions of high and low multi-species genetic diversity in Australia's marine waters. Lead author and Honorary Research Fellow with UQ's School of Biological Sciences, Lisa Pope said the varying genetic diversity had implications for both marine conservation and broader understanding of how species form. (2015-09-16)

Kissing cousins, arranged marriages and genetic diversity
In the first study of its kind, a research team led by Massey University professor Murray Cox et al., in a publication in the advanced online edition of Molecular Biology and Evolution, has examined the effects of arranged marriages on genetic diversity. (2015-05-12)

Researchers find genetic diversity key to survival of honey bee colonies
When it comes to honey bees, more mates is better. A new study from North Carolina State University, the University of Maryland and the US Department of Agriculture shows that genetic diversity is key to survival in honey bee colonies -- meaning a colony is less likely to survive if its queen has had a limited number of mates. (2013-06-17)

Grazer diversity counteracts plant diversity effects on ecosystem functioning in seagrass beds
In a seagrass system, increasing grazer diversity reduced both algal biomass and total community diversity, and facilitated dominance of a grazing-resistant invertebrate. In parallel with previous plant results, however, grazer diversity enhanced grazer biomass production, an important determinant of fish yield in aquatic ecosystems. Moreover, ecosystem responses at high grazer diversity often differed considerably from those predicted by summing impacts of individual species. (2003-07-02)

Humans evolved to be taller and faster-thinking, study suggests
People have evolved to be smarter and taller than their predecessors, a University of Edinburgh study of populations around the world suggests. (2015-07-01)

Passenger pigeon case study: How even large, stable populations may be at risk for extinction
A new study on passenger pigeon (Ectopistes migratorius) genomics suggests that even species with large and stable populations can be at risk of extinction if there's a sudden environmental change. (2017-11-16)

New world map of fish genetic diversity
An international research team from ETH Zurich and French universities has studied genetic diversity among fish around the world for the first time. Their research produced a map that will serve as a tool in improving the protection of species and genetic diversity in the future.  (2020-02-10)

The ecological equivalent of Ellis Island: from ancestry to biodiversity
Steve Hubbell's book claimed many patterns in nature could be explained by the theory that all species are equivalent in competition for resources. In Ecology Letters, March, Etienne and Olff present a novel framework for this theory, relating current diversity of local ecological communities to diversity of ancestors that once immigrated into that local community. They show that neutral theory cannot be decisively rejected, shining new lights on the relationship between biodiversity and genetic diversity. (2004-02-24)

Mean population size increases with diversity
Investigations of the effect of diversity on populations have resulted in few clear patterns. In a recent Ecology Letters article, relationships between community diversity and population stability in unmanipulated annual plant communities are examined. The article shows that community diversity, population size and the temporal stability of populations covaried positively which suggests abiotic factors (e.g. productivity) may govern population stability to such an extent as to override potential effects of diversity. (2003-01-28)

Researchers uncover the arks of genetic diversity in terrestrial mammals
Mapping the distribution of life on Earth, from genes to species to ecosystems, is essential in informing conservation policies and protecting biodiversity. Researchers from the University of Copenhagen and the University of Adelaide developed models based on long-standing evolutionary and ecological theories to explain and map genetic diversity globally, a basal, but up-to-now hidden dimension of biodiversity. (2020-05-22)

Rethink needed to save critically endangered black rhinoceros
A new strategy of conservation must be adopted if the black rhinoceros is to be saved from extinction, concludes a study involving scientists from Cardiff University. (2017-02-08)

UAB creates the first Internet server to search for genetic diversity
Researchers from the Universitat Autònoma de Barcelona have developed the first international server that allows to analyze genetic diversity on a large scale. Published in the special edition of Nucleic Acids Research on bioinformatics, the web will facilitate research about the genetic basis of hereditary diseases. For the first time biologists can search for small variations in the genomes of different individuals and species using data stored in large public genome databases, such as Genbank. (2004-07-19)

Geography predicts human genetic diversity
By analyzing the relationship between the geographic location of current human populations in relation to East Africa and the genetic variability within these populations, researchers have found new evidence for an African origin of modern humans. (2005-03-07)

Genetic diversity helps to limit infectious disease
New research by University of Exeter academics shows that genetic diversity helps to reduce the spread of diseases by limiting parasite evolution. (2016-04-13)

New study explores patterns in species diversity and genetic diversity
A new study by Mark Vellend in the August 2005 issue of the American Naturalist is the first to provide a theoretical model showing that the two central measures of biodiversity -- the number of species in a system and the number of genetic variants within a specific species -- respond similarly to changes in their environment. (2005-07-26)

Genetic diversity predicts susceptibility to a deadly emerging disease
Like nearly a third of all amphibians, the Italian agile frog is a declining species facing potential extinction. Does reduced genetic diversity over a large portion of a species' range imply similarly widespread disease risk? In the April issue of Ecology Letters, Pearman and Garner report an experimental test of this prediction. (2005-04-07)

The lost genetic legacy of American gray wolves
A new study published in the journal Molecular Ecology, suggests that plans to reintroduce American gray wolves to the Western US will not restore the population to the near same extent of genetic diversity it originally boasted. (2004-11-25)

Largest genetic survey to date shows major success of giant panda breeding programs
Breeding programs in conservation centers and zoos hope to save the panda by improving genetic diversity, avoid inbreeding and ultimately, introduce pandas back to the wild. Just how are these high-profile programs doing so far? In a new study appearing in the advanced online edition of Molecular Biology and Evolution, Fuwen Wei, et al., performed the most comprehensive genetic survey so far. (2014-07-22)

The peopling of the Americas
At one time or another most of us wonder where we came from, where our parents or grandparents and their parents came from. Did our ancestors come from Europe or Asia? As curious as we are about our ancestors, for practical purposes, we need to think about the ancestry of our genes, according to Cecil Lewis, assistant professor of anthropology at the University of Oklahoma. Lewis says our genetic ancestry influences the genetic traits that predispose us to risk or resistance to disease. (2009-08-14)

UTHealth: Rapid population decline among vertebrates began with industrialization
Rapid population decline among vertebrate species began at the end of the 19th century when industrialization was at its peak, according to researchers at the University of Texas Health Science Center at Houston and the Chinese Academy of Sciences. (2016-12-15)

Hermaphroditic plants have genetic advantage in areas where extinctions are frequent
In one of the first studies to empirically compare the reproductive success of hermaphrodites and male and female populations, biologists from the University of Oxford make use of the rare and extreme sexual diversity displayed in a species of European weed to test the hypothesis that hermaphrodites have been selected in regions with frequent extinction and re-colonization. (2006-02-21)

Why some people are more attractive than others
If good genes spread through the population, why are people so different? A group of scientists think they have solved this long-standing puzzle. (2007-03-27)

Wildlife in trouble from oil palm plantations, according to scientists
Palm oil plantations are having a catastrophic effect on the sustainability of a variety of plant and animal species, scientists from Queen Mary, University of London have discovered. (2011-05-20)

Marine snail study suggests conservation efforts should move beyond genetic diversity
A study of climate-induced evolutionary change in a California intertidal snail suggests that conservation plans for protecting endangered or threatened species should not focus exclusively on genetic diversity. (2001-05-30)

Texas A&M study reveals domestic horse breed has third-lowest genetic diversity
A new study by Dr. Gus Cothran, professor emeritus at the Texas A&M School of Veterinary Medicine & Biomedical Sciences, has found that the Cleveland Bay horse breed has the third-lowest genetic variation level of domestic horses, ranking above only the notoriously inbred Friesian and Clydesdale breeds. This lack of genetic diversity puts the breed at risk for a variety of health conditions. (2019-12-18)

Diverse gene pool critical for tigers' survival, say Stanford scholars
Increasing tigers' genetic diversity -- via interbreeding and other methods -- and not just their population numbers may be the best solution to saving this endangered species, according to Stanford research. (2014-04-15)

Bigger horns equal better genes
According to a team of international researchers, mature, male alpine ibex demonstrate a correlation between horn growth and genetic diversity. The researchers believe their study offers evidence to support the mutation accumulation theory of ageing, which is the idea that, because natural selection weakens with age, genetic mutations have effects that accumulate over time. (2007-06-05)

'Rule breaking' plants may be climate change survivors
Plants that break some of the 'rules' of ecology by adapting in unconventional ways may have a higher chance of surviving climate change, according to researchers from the University of Queensland and Trinity College Dublin. Dr Annabel Smith, from UQ's School of Agriculture and Food Sciences, and Professor Yvonne Buckley, from UQ's School of Biological Sciences and Trinity College Dublin Ireland, studied the humble plantain (Plantago lanceolate) to see how it became one of the world's most successfully distributed plant species. (2020-02-09)

New maize map to aid plant breeding efforts
A massive survey of genetic diversity in maize has produced a gene map that should pave the way to significant improvements in a plant that is a major source of food, fuel, animal feed and fiber around the world. (2009-11-19)

Genetic diversity necessary for optimal ecosystem functioning, according to UGA research
Though it has long been known by scientists that an ecosystem needs different kinds of plants and animals for optimal functioning, University of Georgia scientists have recently found that the genetic diversity of species within a habitat also affects ecosystem processes. (2002-08-20)

Endangered animals can be identified by rate of genetic diversity loss
A Purdue University study presents a novel approach for identifying vertebrate populations at risk of extinction by estimating the rate of genetic diversity loss, a measurement that could help researchers and conservationists better identify and rank species that are threatened or endangered. (2015-08-31)

DNA exchange among species is major contributor to diversity in Heliconius butterflies
Exchange of genetic material among species played a major role in the wide diversity of Heliconius butterflies, according to a new study, results of which inform a centuries-long debate about the value of hybridization to species evolution. (2019-10-31)

New research proves single origin of humans in Africa
New research published in the journal Nature July 19 has proved the single origin of humans theory by combining studies of global genetic variations in humans with skull measurements across the world. The research, at the University of Cambridge and funded by the Biotechnology and Biological Sciences Research Council, represents a final blow for supporters of a multiple origins of humans theory. (2007-07-18)

Cattails and contamination: marshy stalks hold DNA clues on pollution
A team of researchers at the University of Cincinnati has detected significant differences in the genetic diversity of common cattails in areas heavily impacted by pollution, providing evidence that cattails might be an effective indicator of environmental stress. (1999-10-24)

The human Y chromosome is not likely to disappear
Is the male Y chromosome at risk of being lost? Recent work by Dr. Wilson Sayres and colleagues at UC Berkeley, published in PLOS Genetics, demonstrates that the genes on the Y chromosome are important: they have probably been maintained by selection. This implies that despite its dwindling size, the Y chromosome will be sticking around. (2014-01-09)

People in New Guinea exhibit great genetic diversity
A genetic analysis of people from Papua New Guinea reveals a sharp genetic divide between those residing in the highlands and lowlands, beginning 10,000 to 20,000 years ago. (2017-09-14)

New keys to keeping a diverse planet
Human activities are eliminating biological diversity at an unprecedented rate. A new UC-Davis study offers clues to how these losses relate to one another -- information that is essential as scientists and land managers strive to protect the remaining natural variation. (2007-09-26)

Interacting mutations promote diversity
Frequency-dependent selection fosters the diversity of populations but does not always increase the average fitness of the population. (2012-06-28)

Family ties: Social structure matters in species conservation
Many animal species live and breed in groups with complex social organizations. The impact of this social structure on the genetic diversity of animals has been a source of disagreement between scientists. In a study now published in the scientific journal PNAS, a research team from Instituto Gulbenkian de Ciencia provides a new mathematical model that can be used to better predict how social groups influence the way species maintain genetic diversity and evolve, and ultimately help in the conservation of species. (2015-06-15)

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