Management of Soybean Cyst Nematode
Soybean cyst management tactics include different methods from place to place, but all have the common method of using resistant soybean cultivar and crop rotation and these are found to be more effective than others tactics.(Niblack et al., 2003, Schmitt et al., 2004a, Oyekanmi & Fawole, 2010).
Host Resistance
Different resistance genes have been exploited from different soybean germplasm for developing resistant soybean cultivar against Heterodera glycines (Concibido et al., 2004b). The resistance genes to Heterodera glycinces were explored first time in soybean germplasm Peking, which conferred three recessive genes rhg1, rhg2, and rhg3 in 1960(Caldwell et al., 1960) later the fourth new dominant gene Rhg4 resistant to Heterodera glycinces was also identified in Peking, which was closely linked to i locus and responsible for distribution of pigmentation of seed coat(Matson & Williams, 1965). Likewise the another dominant resistant gene was discovered in germplasm PI88788 and later named as Rhg5(Rao-Arelli et al., 1992, Rao-Arelli, 1994). For developing resistant cultivar against Heterodera glycines seven differential line PI 548402(Peking), PI 88788, PI 90763, PI 437654, PI 209332, PI 89772, PI 548316 (Cloud) are mostly used out of those seven lines PI 548402(Peking) and PI 88788 constitute more than 90% of the resistant cultivar in the United states (Concibido et al., 2004a, Shannon et al., 2004, Schmitt et al., 2004b). A novel QTL
| Monsanto continues to grow with future acquisitions of other companies in the industry (i.e. Asgrow Agronomics, Holden’s Foundation Seeds, Corn States Hybrid Service, and DeKalb Genetics Corp.).- Monsanto expands its production of genetically modified seed products which are herbicide tolerant. These include, “Roundup Ready Canola,” “Roundup Ready Cotton,” and “Roundup Ready Corn.”- Monsanto is also the first company to introduce a dual genetically engineered seed with protection from both insects and herbicides (cotton and corn seeds).
Are you suffering from an ovarian cyst and trying to find natural ways to get rid of it. Women who have a tendency of developing ovarian cyst or those women who are looking for some relief must read this article.
1. Epidermoid cyst. Epidermoid cysts are the third most common benign subcutaneous tumor. They result from the proliferation of epidermal cells within a circumscribed space of the dermis. The epidermal inclusion cysts are usually well circumscribed, have a smooth surface, and are mobile.
crops led to the rise of “superweeds,” which are resistant to the key active ingredient in
A farmer grows these soybeans which then only require one application of weed killer instead of multiple applications, reducing production cost and limiting the dangers of agricultural waste.
Duke, S. O. (1995). Herbicide-Resistant Crops: Agricultural, Economic, Environmental, Regulatory, and Technological Aspects. 83-84. Boca Raton, Florida: CRC Press.
Many farmers in Canada have welcomed major crop plants produced by genetic engineering. Four major transgenic crops including canola, corn, soy and sugar beet have been approved for commercial production in Canada (Canada & Agency, 2015). Transgenic organisms offer a range of benefits in the agricultural applications. Over many years, transgenic organisms have helped increase crop productivity by introducing drought tolerance and disease resistance to crops. Today, scientist has been able to select genes for disease resistant from other organism and relocate them to essential crops. For example, in the 1980, researchers from University of Hawaii teamed up with Cornell University to develop a papaya cultivar resistant to papaya
The USDA regulates GMOs from the standpoint of preventing the spread of pests, weeds, and diseases under the Federal Plant Pest Act (FPPA). USDA also regulates the spread of new varieties of feedstock whether they are developed by selection or hybridization, or are genetically modified. Crops that are bioengineered for pest resistance could have a number of advantages, such as increased yield and reduced or eliminated use of insecticides.127 Hundreds of field trials of GMO plants are now being carried out each year with only researcher notification, as is required by the USDA.127
(Micahael Wald “GMO-genetically modified organisms dangerous or necessary?" Health reference center academic) There are many steps involved in the development of genetically modified organisms crops; the gene first needs to be isolated then inserted into a transder vector. A plasmid or circular model of DNA is used to transfer the isolated gene from the naturally occurring soil bacterium, then the gene of rDNA of interest is used to be inserted into the plasmid, the cell that’s now containing the plasmid and the new gene is then combined with the original cells from the plant, then the cells take up the plasmid containing the transfer DNA and changes gene that are responsible for the resistance are inserted into the plasmid and transferred with the genes that contain the desired traits. The cells that are exposed to antibiotic, and herbicide only the cells that were transformed survive. Cells that are transformed can be regenerated to form plants by culturing tissue. Once genetically modified plants are grown, certain tests are used to determine the number of copies the gene inserted, and if the copies are intact and the gene function. The
“We forget that we humans are animals, inextricably connected to the world and everything in it. In the rush to bring GMO food to the world because it was good for us, nobody had asked the question whether it would be good for the world.” ― Kenneth Eade, An Involuntary Spy. “In the year 1988 Scientists inserted genes into soybeans, ultimately creating what would become the most common GMO: glyphosate-tolerant soybeans. Making a crop that was resistant to herbicide made it much easier, and cheaper, for farmers to control weeds while producing high yields. Soon, other GMO seeds were developed — including potato, cotton, rice, sugar beets, sugarcane, and tomatoes — with the intention of making these crops resistant to insects, antibiotics, diseases,
However, opponents of genetically modified crops tend to argue that they do more harm than good and production should be ceased. The largest and one of the only problems existing with modern genetically modified crops is the unfortunate appearance of “super weeds”. Although genetically modified crops can increase production and reduce insecticide usage, “thirteen years of GMO crops in the USA has increased overall pesticide use by 318 million pounds” (Engdahl 3). The constant usage of genetically modified organisms has caused a great increase in progressively tougher weeds, which have even evolved to earn the title of “Super Weeds”. One of the most fearsome super weeds is the Palmer Pigweed, which can grow up to 2.5 meters high and is incredibly resistant to weather, pesticide, and even had tools. Super weeds such as the Palmer Pigweed have even caused farmers to have to abandon their farms in places such as Arkansas.
pushing Roundup Ready Soybeans – a crop system that is no tastier, no healthier, and
Furthermore, superweeds are created, which are resistant to that specific herbicide. To then kill the superweeds, a different kind of herbicide has to be used, which additionally harms the environment. Due to this, many amounts of herbicides have to be used. In addition to the GM superweed being bad for the environment, it is also bad for the economy as poor farmers can’t afford the GM soybeans. Without the GM soybean, the conventional soybeans do not possess the genes which make them resist herbicides and harsher weather. This will result in a smaller amount of soybeans to sell, which will then make the farmers without the rights to use GM soybeans have less income. As a result, the farmers without the GM soybean are unable to make the soybeans cheaper as they would then not make any profit. Although the GM soybean is mainly bad for the economy, it is also good as some farmers profit from this. The GM seeds allow the farmers to have more harvest as fewer soybeans will die due to weather, other plants or insects. As a result, these farmers will be able to sell the soybeans at a cheaper price, making more profit, as there is a greater quantity of
The development of recombinant DNA techniques have allowed desired genes to be inserted into a plant genomes resulting in plants that are totally different to the parent plant. The first genetically modified plant-antibiotic resistant tobacco and petunias-were produced in 1983, but it was until 1994 that US markets saw the first genetically modified species of tomato, approved by the Food and Drug Administration (FDA). Since then, several transgenic crops have received FDA
The development of genetically engineered foods began in the 1900s, and has been in United State markets since 1995 (Bredahl 18). The most widespread genetically modified foods are oil, maize, cotton, and soybeans (Cunningham 11). Transgenic foods were products created to increase benefit and lower prices (Whitman 2). Genetically modified foods are essential to enrichments of crops (Tan 3). It helps reduce the use of herbicides and pesticides in plants, enhances taste and quality, lower maturation time,