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Tag: "wild" at biology news

The genetic origins of corn on the cob

...tes that during the domestication of corn from its wild ancestor (teosinte), early farmers selected plants with special versions of the ramosa1 gene that suppressed branching in the ear, leading to the straight rows of kernels and the compact ears of modern-day corn on the cob. The findings are described ...

$6.5 Million Grant for Microarray Center at Yale School of Medicine

...tes that during the domestication of corn from its wild ancestor (teosinte), early farmers selected plants with special versions of the ramosa1 gene that suppressed branching in the ear, leading to the straight rows of kernels and the compact ears of modern-day corn on the cob. The findings are described ...

Novel plague virulence factor identified

...ntion." The Y. pestis bacterium primarily infects wild rodents, such as mice, rats and squirrels. It is usually transmitted by fleas, which spread the infection as they feed on the blood of mammals. There are different forms of plague in humans -- bubonic, pneumonic and septicemic -- depending on site of...

Wild grasses and man-made wheats advance research capabilities

...sion Center and state wheat breeder, is looking at wild grass species and synthetic wheats for possible so...s can't be obtained in a wheat-to-wheat cross." A wild grass collection being mined for its genetics has 716 lines of wheat relative species. The grasses o...

New Look at DNA Hints at Origin of UV Damage

...ntion." The Y. pestis bacterium primarily infects wild rodents, such as mice, rats and squirrels. It is usually transmitted by fleas, which spread the infection as they feed on the blood of mammals. There are different forms of plague in humans -- bubonic, pneumonic and septicemic -- depending on site of...

Divergent life history shapes gene expression in brains of salmon

..."Since these males of the same species in the same wild environment differed only in their life history, w...vertebrate species, in that it combined the use of wild individuals, caught in a tributary of the Connecticut River in western Massachusetts, with new funct...

Bacteria are key to 'green' plastics, drugs

...cinate in two different ways. One method exists in wild strains of E. coli and has been modified with the deletion of four genes, each of which codes for a protein that interferes with or limits E. coli's ability to turn glucose into succinate. Bennett and San activated a second pathway and stimulated pro...

Cultural norms not unique to human societies

...research methods: population-level observations on wild apes and one-to-one social learning experiments. ...It makes it likely differences in tool use between wild chimpanzee communities in Africa indeed reflect a form of culture and establishes another link betwe...

Mayan stingless bee keeping: Going, going, gone?

...ild up breeding stock to be re-introduced into the wild where bees play an important role as pollinators," Roubik explains. But beekeeping is fast becoming a global monoculture. Africanized honey bees produce more honey, and therefore are an economically attractive option for bee keepers. In the Mayan tr...

Bird samples from Mongolia confirmed as H5N1 avian flu

...e first instance of this viral strain occurring in wild migratory birds with no apparent contact to domest...owl. Present in Mongolia for a health survey of wild bird populations in the south and north of the country, WCS field vets Drs. William Karesh and Marti...

Proposal would allow wild animals to roam North America

...cheetahs, lions, elephants, camels and other large wild animals may soon roam parts of North America. "I...h America include feral horses ( Equus caballus ), wild asses ( E. asinus ), Bactrian camels ( Camelus bactrianus ), Asian ( Elephas maximus ) and African (...

'Underground' tunnels discovered as means for communication between immune system cells

...-lapse video, the cells appear more like a pack of wild animals feeding on a carcass. But two things baffled the researchers. Dendritic cells extended their veils even before making physical contact with E. coli, yet macrophages, cells not normally picky about the antigens they engulf, were completely un...

From a Few Wild Ancestors, a Citrus Cornucopia

...arly critical—especially since many of the world’s wild citrus stands are at risk from encroaching industrialization. “Citrus’s area of origin—northern India, southern China, and nearby Southeast Asia—is experiencing rapid population growth and development,?says Krueger. He hopes to travel to southern Ch...

WCS says avian flu prevention should focus on farms, markets

...ngolia's Kovsgol province, collecting samples from wild birds that have recently contracted the virus. "W...ltry and waterfowl are allowed to intermingle with wild birds. Wildlife markets--where wild and domesticated species are kept in close proximity--are also h...

DNA from feathers tells tale of eagle fidelity

... Katzner said. "This approach allows us to monitor wild populations in a way that's less invasive and more cost-effective than other methods." Observational studies of imperial eagles suggest these birds, like most large birds of prey, are at least socially monogamous. This means a male-female pair stays...

Controlling wildlife trade key to preventing health crises, study says

...." According to the study, every year millions of wild animals pass through markets on their way to regio...uding humans, in the process. Domestic animals and wild scavengers in market places and villages also consume the waste and remnants of infected trade anima...

Agricultural antibiotic use contributes to 'super-bugs' in humans

...soil around farms, in surface and ground water, in wild animal populations, and on retail meat and poultry. These resistant bacteria are carried into the kitchen on contaminated meat and poultry where other foods are cross-contaminated because of common, unsafe handling practices. Following ingestion, bac...

UW scientists report a new method to speed bird flu vaccine production

...he human immune system to recognize and defeat the wild viruses that spread among humans in an epidemic or pandemic. In their report, a team led by UW-Madison virologists Yoshihiro Kawaoka and Gabriele Neumann, describes an improved "reverse genetics" technique that makes it easier to make a seed virus i...

Drug resistant avian influenza viruses more common in Southeast Asia than North America

...e has been spreading throughout chicken flocks and wild birds in Southeast Asia since it emerged in 1997. Between late 2003 and early 2004, outbreaks of highly pathogenic avian H5N1 influenza occurred among poultry in eight Asian countries, causing the death or destruction of tens of millions of birds. As...

Costly breeding programs for endangered species pay off

...sed on their fitness scores. The release into the wild was simulated by adding environmental stress. In the "post-release" breeding scenario, temperatures in incubators were altered on a 12-hour cycle based upon the high and low temperatures recorded in Houston that day. In both strategies, all breeding...

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