Resistance genes are genes that help organisms, like bacteria, plants, or animals, defend themselves against harmful substances or conditions. These genes allow them to survive and thrive even when faced with things that might harm or kill other organisms.
Full definition
The high overall activity
of resistance genes did not cause any negative effects for the development of the wheat or its yield.
This is because nearly all antibiotics are based on molecules that microbes use to fight each other, so bacteria carry
resistance genes in self - defence.
If these bacteria happen to come into contact with other microbes that
carry resistance genes, those genes can pop over in one step.
There is a need for both innovative, durable
disease resistance genes ad smart strategies for the deployment of resistant crop varieties.
Identifying where
resistance genes come from and how they spread somewhat compares to finding patient zero in an outbreak, which is not an easy task.
Using mass DNA sequencing, he recently identified
resistance genes even in bacteria in pristine permafrost and deep caves.
And both bacteria displayed the very
same resistance gene — most likely it had been transferred to them from bacteria living in the gastrointestinal tract.
New Danish research has now revealed that the most
common resistance genes in wastewater treatment plants are not to be found among bacteria outside these facilities — in people or animals, for example.
The researchers also found that the antibiotic -
resistance genes in soil are linked tightly to specific bacteria, suggesting little sharing between species.
Now Yi - Yun Liu at the South China Agricultural University in Guangzhou and colleagues have discovered the first known
resistance gene for colistin that is able to move freely from one bacterium to another.
Some transgenic crops contain antibiotic
resistance genes as selection markers that were used during the process of transgene construction.
Evaluation of
resistance gene transfer from heat - treated Escherichia coli — Laëtitia Le Devendec — International Journal of Food Microbiology
The researchers, including Nesme and senior author of the study Pascal Simonet, took advantage of the ever - growing reams of existing next - generation sequencing data that are freely available in public repositories together with information about antibiotic
resistance genes found in pathogens infecting patients in the clinic.
In addition, they observed that parasites with multiple copies of the
multidrug resistance gene pfmdr1 tended to be less susceptible to several drugs, including DHA.
But many of the microbes Chénier's team studied harbored a chlortetracycline
resistance gene on plasmids, even after years without the antibiotic.
It may take as long to breed a
new resistance gene into a new cultivar as to introduce a new fungicide (± 10 years), even though this time can be shortened somewhat today with molecular tools by reducing the back - crossing cycles.
By combining understanding of
resistance genes with knowledge of the pathogen, they hope to develop Desiree and Maris Piper varieties that can completely thwart attacks from late blight.
The proliferation in gut bacteria of these markers would require first the uptake of the functional
resistance gene by a gut bacterium, and then a selective advantage for that bacterium to survive and multiply.
Nevertheless, it does provide excellent sensitivity for identifying
multi-drug resistance genes in canines which can help identify more effective treatments should the pet have an infection or any other health condition that requires medication.
Diverse and abundant antibiotic
resistance genes from mariculture sites of China's coastline — Quanxin Gao — Science of The Total Environment
A three - phase experiment was conducted on a doubled - haploid population derived from the cross RL4452 / AC Domain to determine if the resistance of a recently discovered gene (Lr2BS) worked with
other resistance genes to synergistically enhance resistance to leaf rust.
A plasmid is like a bacterial gene delivery truck; it is the primary way antibiotic
resistance genes spread between bacteria.
Some soybean varieties have resistance to the tiny parasitic worms through conventional breeding of naturally
occurring resistance genes, but the current level of resistance is becoming less reliable.
But scanning a soil sample for specific types of genes is tricky because there are so many genes in total, and most
bacterial resistance genes found in soil in the past have differed from those seen in human pathogens.
Professor Bruce Fitt, professor of plant pathology at the University of Hertfordshire, added: «This new understanding of plant defense through ETD suggests different operations of
specific resistance genes which will help us to be more successful in breeding new strains of crops for resistance.
In the last three years, Byamukama and graduate student Krishna Acharya have collected soil samples from 28 East River counties to determine
which resistance gene sources are still effective against the predominant races of Heterodera glycine, or soybean cyst nematode, in South Dakota.
As a first line of defense, wheat breeders and researchers began looking for
resistance genes among those that had already been discovered in the existing germplasm repositories, he said.
Phrases with «resistance genes»