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Genetic diversity
The variety of genes within a particular species, variety, or breed. (source: WCMC) Background from Wikipedia Genetic diversity is a characteristic of ecosystems and gene pools that describes an attribute which is commonly held to be advantageous for survival -- that there are many different versions of otherwise similar organisms. For example, the Irish potato famine can be attributed in part to the fact that there were so few different genetic strains of potatoes in the country, making it easier for one virus to infect and kill much of the crop. The academic field of population genetics includes several hypotheses regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions. Diversifying selection is the hypothesis that two subpopulations of a species live in different environments that select for different alleles at a particular locus. This may occur, for instance, if a species has a large range relative to the mobility of individuals within it. Frequency-dependent selection is the hypothesis that as alleles become more common, they become less fit. This is often invoked in host-pathogen interactions, where a high frequency of a defensive allele among the host means that it is more likely that a pathogen will spread if is able to overcome that allele. Earthtimes,..."Theory suggests it should be difficult for asexual organisms to adapt to a changing environment because genetic diversity can only arise from mutations The genetic map maker - Oct 17, 2007 Nature.com (subscription),Luigi Luca Cavalli-Sforza was one of the first to explore human genetic diversity as a geographer might. He talks to Alison Abbott about his new project to Database Of Human Genetic Diversity Allows Identification Of ... - Oct 18, 2007 Medical News Today (press release),Investigators from six countries have completed the second phase of the International HapMap Project, an effort to identify and catalog genetic similarities Zimbabwe: Scientists Call for Genetic Diversity - Sep 24, 2007 AllAfrica.com,..."The international community is beginning to appreciate the seriousness of this loss of livestock genetic diversity. FAO is leading inter-governmental Genetic Ancestral Testing Cannot Deliver On Its Promise, Study Warns - Oct 18, 2007 Science Daily (press release)..."Worldwide patterns of human genetic diversity are weakly correlated with racial and ethnic categories because both are partially correlated with geography GMOs Perfected Down to the Chromosome Level - Oct 20, 2007 SlashdotGenetic diversity is good, it is necessary for survival. What happens to that diversity when a super-plant is created that dominates all the species around 16 - Scientists eye plant genetic resources conservation plan - Oct 16, 2007 Bayanihan.org,Scientists are looking for means to preserve the genetic diversity of local plants to avert threats against food production that may be caused by increasing ALAN BERNER / THE SEATTLE TIMES - Oct 21, 2007 Seattle Times,My whole mission is to preserve the genetic diversity of chickens, turkeys, ducks and geese," Reese said. "We used to have 250 varieties of poultry in this Australian wildlife could suffer deadly disease: researcher - Oct 10, 2007 AFPBelov's team found that a lack of genetic diversity in devils, carnivorous marsupials the size of a small dog, was responsible for the spread of the Diversity is good for your lawn, too - Oct 18, 2007 Daily Press,..."Whenever possible, it is still desirable to blend or mix cool-season grasses to take advantage of the genetic diversity," he says. "Now mixing warm-season Biodiversity research strategies for a sustainable future - Oct 21, 2007 Times of Malta,Indeed measuring genetic diversity is at the heart of our understanding of biological diversity. Malta's research group actively participates in this Human genetic diversity through chromosome structure - Sep 29, 2007 Ars Technica,By John Timmer | Published: September 28, 2007 - 03:02PM CT A few years ago, people were focusing on the lack of human genetic diversity. Inbred tassie devils face extinction: study - Oct 3, 2007 ABC Online,The problem is a lack of genetic diversity because of inbreeding. The scientists say their genetic work reveals that there is such a lack of diversity in Web 2.0 Summit: Google The DNA Of Prospective Mates? - Oct 19, 2007 InformationWeek,..."Both versions greatly underestimated human genetic diversity," according to a statement from the Venter Institute announcing the more recent findings. Tasmanian devils face extinction - Oct 3, 2007 Science Daily (press release)...full story Genetic Diversity Predicts Susceptibility To A Deadly Emerging Disease (April 21, 2005) -- Theory and molecular immunology predict that reduced Tassie devils doomed, say researchers - Oct 11, 2007 The Age,Australia's iconic Tasmanian devils are a threatened species because the fierce dog-like creatures have lost the genetic diversity that would ensure their Treasure trove - Oct 15, 2007 Malaysia Star,The aim is to preserve genetic diversity, needed by plant breeders in the future to produce varieties able to adapt to challenges like climate change. So similar, yet so different - Oct 17, 2007 Nature.com (subscription),See http://tinyurl.com/3xw89t for an interview with Luca Cavalli-Sforza about his Italian Genome Project and geographic genetic diversity. The other Nobels A Canadian farm couple brings attention to the ... - Oct 19, 2007 Houston Chronicle,...reduce the genetic diversity of staple crops, introduce environmental threats from doctored plant species and rob farmers of the centuries-old practice Full Text - Oct 18, 2007 Science Magazine (subscription)This can be problematic because high genetic diversity exists within populations and gene flow occurs between populations. Very few alleles are therefore Race and intelligence - Oct 19, 2007 New Statesman,There is wide cultural and genetic diversity amongst African populations from south to north, from Ethiopians to Nigerians. There are, for example probably Tassie devils are fighting for survival - Oct 8, 2007 Ararat Advertiser,Loss of genetic diversity is causing the rapid spread of deadly facial tumours among Tasmanian devils, leaving the animals with no immune response to fight New Keys To Keeping A Diverse Planet - Sep 26, 2007 Science Daily (press release)..."This is one of the first studies to show that genetic diversity and species diversity depend on each other," Lankau said. "Diversity within a species is Supervisory Research Geneticist/Molecular Biologist/Plant Pathologist - Oct 17, 2007 Nature.com (subscription),Objectives of personal research are to: develop and apply new genetic markers for phylogenetic and genetic diversity analyses of priority crops, Beware commercial ancestry tests, researchers warn - Oct 19, 2007 CBC News,Even those databases with 10000 to 20000 samples can "fail to capture the full array of human genetic diversity in a particular population or region," the Tassie devil tumour breakthrough made - Oct 3, 2007 NEWS.com.au,They say a lack of genetic diversity in the devil population is allowing the devil facial tumour disease to spread quickly. Scientists have discovered that Tasmanian devils face extinction - Oct 3, 2007 United Press InternationalBut now scientists at Sydney University have suggested a lack of genetic diversity because of inbreeding will doom the devils in any case. Spread Of Endogenous Retrovirus K Is Similar In The DNA Of Humans ... - Oct 12, 2007 DentalPlans.com,...have a greater genetic diversity than humans (due to a greater effective population number Ne), even when humans have a far greater sensus population. Celebrating NC’s red wolves - Oct 18, 2007 FayObserver.com,...of the genetic pedigree of every wolf, going back to the original 14, and computers determine the pairing of mates for maximum genetic diversity. Lacombe swine is poster pig for endangered farm animals - Sep 23, 2007 Edmonton Journal,..."We're losing all this genetic diversity, disease resistance, the ability to adapt," says Ted Lawrence, chair of the Ottawa-based Rare Breeds Canada. Groups Urge Emergency Protection for Rare Checkerspot Butterfly to ... - Oct 17, 2007 E-Wire (press release),...to save the genetic diversity in butterfly populations potentially impacted from spraying, and to ensure the survival of the butterfly. Tasmanian Devils face extinction - Oct 4, 2007 Nature.com (subscription),Research has now uncovered why the animals have no immune response at all to the tumours – genetic diversity in a key set of genes is so low that the Eighty million years without sex - Oct 12, 2007 BBC News,The latest discovery explains why the bdelloids have likely escaped this fate with their mechanism for generating genetic diversity in the absence of sexual The seed bank atop the world - Oct 11, 2007 Los Angeles Times,In the last century, as much as 75% of the genetic diversity -- hundreds of thousands of plant varieties -- has been lost, according to the United Nations Global plan to save endangered horse and livestock breeds - Sep 23, 2007 Horsetalk,Among many of these breeds, within-breed genetic diversity is being undermined by the use of a few highly popular sires for breeding. A background check for human posterity - Sep 24, 2007 Boston Globe,Because groups that have been around longer have developed more variation, there is more genetic diversity in the average African village than in the rest The search for useful mutants - Oct 10, 2007 Sydney Morning Herald,The random results of the dice, he explains, illustrate how spontaneous mutations create the genetic diversity that drives evolution and selective breeding. "Noah's Ark" of seeds would ensure tomatoes would live on after ... - Oct 8, 2007 Greeley Tribune,They key to the seed lab's research is to make sure the seed collections efficiently maintain viability and genetic diversity, she said. Your letters - Oct 20, 2007 The Observer,There is wide cultural and genetic diversity among Africans. To group the entire populations of Africa together is a characteristically racist trick. WWU researcher studies how plants live through climate change - Oct 14, 2007 Seattle Times,By examining the genetic diversity of the same, or very similar plants, he's hoping to determine how long they've existed on Earth — as long as 18000 years, Demand for Animal Products May Double in 20 years - Oct 16, 2007 Voice of AmericaAnni McLeod of the UN Food and Agriculture Organization (FAO) says genetic diversity may be needed in the future. "In poultry for example, there are about Preserving Genetic Variety of Valuable Specialty Crops - Oct 10, 2007 Agricultural Research,...and his colleagues are collecting and conserving woody landscape tree and shrub accessions as part of a national effort to preserve genetic diversity. Devils' ills tracked back - Oct 3, 2007 The Mercury,This was due to a loss of genetic diversity in the most important immune gene region of the genome -- the Major Histocompatibility Complex (MHC). In Dogs, A Shortcut To Mapping Disease Genes - Oct 2, 2007 Science Daily (press release)...“Our new mapping methods take advantage of the power of reduced genetic diversity in dog breeds and the sharing of mutations across breeds to identify Inbred devils vulnerable to tumours - Oct 3, 2007 ScienceAlert,..."This was due to a loss of genetic diversity in the most important immune gene region of the genome: the Major Histocompatibility Complex (MHC). Tasmanian Devil falling prey to cancer - Oct 7, 2007 Scientific AmericanSYDNEY (Reuters) - A lack of genetic diversity in Australia's Tasmanian Devil means it has failed to launch an immune defense response to a facial cancer Tasmanian tumours blamed on inbreeding - Oct 7, 2007 Register,...which has halved the devil population in just over a decade and may obliterate it altogether in another, is due to a lack of genetic diversity. Genes Determine Mate Choice, At Least For Fat Tailed Dwarf Lemurs - Sep 29, 2007 Science Daily (press release)MHC-associated mating strategies and the importance of overall genetic diversity in an obligate pair-living primate (in Evolutionary Ecology; On DNA and race - Oct 7, 2007 seattlepi.com Buzzworthy..."There is tremendous genetic diversity among other species of animals but not among humans because our common history is so recent," [molecular biologist Preventing Extinction: The Miracle of the Frozen Zoo - Oct 13, 2007 AlterNet,..."What we're trying to conserve is the genetic diversity of species," says Ryder, which gives animals the best chance of survival in the wild. News index | RSS | News Feed Advertisements: Organic Apparel from Patagonia | Insect-repelling clothing |
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