Sentences with phrase «stem rust»

The effort has already had one practical result: the discovery of two new genes for resistance to a race of wheat stem rust to which there is virtually no resistance in wheat.

«Potential boost for world's food supply: Resistance gene found against Ug99 wheat stem rust pathogen.»

«For example, a breeder might succeed in adding a favorable allele for stem rust resistance from a wild barley, but along with that gene drag along another gene that causes shattering of the mature head,» Close said.

A significant breakthrough in combatting wheat stem rust disease caused by the fungus Puccinia graminis f. sp. tritici was recently achieved through the combined work of an international collaborative team, showing the power of cooperative research approaches.

A similar discrimination of results from SSR or SNP genotyping based on D - samples (dead) and race phenotyping from live samples is under development for stem rust data.

RNAi may also benefit major staple - food crops, protecting wheat against stem rust, rice against blast, potato against blight and banana against fusarium wilt.

The team's study, «Identification of Wheat Gene Sr35 that Confers Resistance to Ug99 Stem Rust Race Group,» appears in the journal Science.

First Report of Virulence to Sr25 in Race TKTTF of Puccinia graminis f. sp. tritici Causing Stem Rust on Wheat / Patpour, Mehran; Hovmøller, Mogens Støvring; Hodson, D.

It was the dominant race in the 2013 stem rust outbreak in Germany and infected 10,000 hectares of wheat in Ethiopia's breadbasket the same year.

Three epidemics of stem rust from 1939 - 1941 destroyed wheat crops in the Yaqui Valley of Mexico.

Bringing researchers together to work on stem rust has now become a second calling for Borlaug.

An audio slideshow chronicles Norman Borlaugs lifelong efforts to defeat a wheat pathogen called stem rust (also see News Focus).

A scrappy, ancient species of wheat may help today's widely cultivated bread wheat fight the devastating fungus known as stem rust (shown growing on wheat stems).

In 1904, stem rust destroyed more than half the harvest in South Dakota, then considered the wheat center of the world.

But when stem rust returned in 1998, Borlaug says he was not surprised.

In 1944 Borlaug, trained as a plant pathologist, left the U.S. for Mexico to fight stem rust, a fungus that infects wheat, at the invitation of the Rockefeller Foundation, among others.

The research, published today in the journal Nature Plants, quantifies for the first time the circumstances — routes, timings and outbreak sizes — under which dangerous strains of stem rust pose a threat from long - distance dispersal out of East Africa to the large wheat - producing areas in India and Pakistan.

However, the continued emergence of stem rust variants that overcome new resistance genes, now demands an increased focus on pathogen evolution and virulence mechanisms.

Numerous stem rust resistance (Sr) genes are known and in recent years several of these have been cloned and used to develop so - called «perfect» markers to allow more rapid and accurate breeding.

New research to resolve stem rust epidemiology in the region and additional efforts in breeding for rust resistance is urgently needed.

As reported today in Communications Biology, an international team of researchers led by the John Innes Centre, U.K., found that 80 percent of U.K. wheat varieties are susceptible to the deadly stem rust strain.

Between 1951 and 1969, the US stockpiled more than 30,000 kg of wheat stem rust spores, which Dr Simon Whitby estimated is probably enough, in theory at least, to infect every wheat plant on the planet.

He wrote about stem rust in The Times last year, describing how the disease «can turn a healthy crop of wheat into a tangled mass of stems that produce little or no grain.»

This makes me happy: a research project has identified a gene that gives wheat plants resistance to one of the most deadly races of the wheat stem rust pathogen, Ug99.

Nobel Peace Prize — winner Norman Borlaug developed resistant varieties of wheat that protected the world against stem rust for decades.

Stem rust disease was controlled for decades through the use of resistant wheat varieties bred in the 1950s by scientist Norman Borlaug and his colleagues.

An audio slideshow chronicles Norman Borlaug's lifelong efforts to defeat a plant pathogen called stem rust.

As stem rust is a fungal disease, the spores are easily dispersed in air.

They also yield 15 per cent more grain and resist Ug99 stem rust.

The fungi that cause stem rust, leaf rust and stripe rust belong to the genus Puccinia.

CAUTION: Risk of wheat stem rust in Mediterranean Basin in the forthcoming 2017 crop season following outbreaks on Sicily in 2016

Concern about yellow rust has languished as wheat scientists rushed to respond to a related disease, the Ug99 strain of stem rust against which little of the world's wheat has any resistance.

The discovery may help scientists develop new wheat varieties and strategies that protect the world's food crops against the wheat stem rust pathogen.

The environmental constraints are predictable, said Hussein: water scarcity, high heat, poor soil fertility and diseases like the Ug99 strain of stem rust that was first discovered in neighboring Uganda.

Yellow rust has historically been less deadly than stem rust, and thrived only in cool countries.

Eduard Akhunov, associate professor of plant pathology at Kansas State University, and his colleague, Jorge Dubcovsky from the University of California - Davis, led a research project that identified a gene that gives wheat plants resistance to one of the most deadly races of the wheat stem rust pathogen — called Ug99 — that was first discovered in Uganda in 1999.

Next, researchers isolated the candidate gene and used biotechnical approaches to develop transgenic plants that carried the Sr35 gene and showed resistance to the Ug99 race of stem rust.

Wheat stem rust is caused by a fungal pathogen.

First, they chemically mutagenized the resistant accession of wheat to identify plants that become susceptible to the stem rust pathogen.

The discovery may help scientists develop new wheat varieties and strategies that protect the world's food crops against the wheat stem rust pathogen that is spreading from Africa to the breadbaskets of Asia and can cause significant crop losses.

It identifies the stem rust resistance gene named Sr35, and appears alongside a study from an Australian group that identifies another effective resistance gene called Sr33.

Eduard Akhunov, associate professor of plant pathology at Kansas State University, stands in front of the einkorn wheat researchers used for identifying the Sr35 gene that is resistant to the Ug99 strain of wheat stem rust.

«So this work will really help understand how new rust diseases like the highly destructive Ug99 race of wheat stem rust can overcome resistance in crops.»

«Until that point, wheat breeders had two or three genes that were so efficient against stem rust for decades that this disease wasn't the biggest concern,» Akhunov said.

It also has applications in plant breeding by increasing the precision of markers for traits such as malting quality or stem rust.

«Now the breeder would have a stem rust resistant plant, but the seeds would all fall to the ground rather than remain on the plant until harvest.

Close explained that plant breeders rely on meiotic recombination to introduce favorable forms of genes for malting quality, stem rust or any number of traits into cultivated varieties.