Agricultural biotechnology, or agritech, is a branch of agricultural science that focuses on modifying living things, such as plants, animals, and microorganisms, using scientific tools and methods.
These include genetic engineering, molecular markers, molecular diagnostics, vaccines, and tissue culture.
One area of agricultural biotechnology that has seen significant development recently is crop biotechnology.
Desired traits are transferred from one type of crop to another type of crop. These transgenic crops have favourable traits in terms of flavour, floral colour, growth rate, harvested product size, and pest and disease resistance.
A variety of scientific methods are employed in agricultural biotechnology to enhance plants, animals, and microbes. Based on a knowledge of DNA, scientists have created strategies to boost agricultural output.
Starting with the capacity to locate genes that could benefit certain crops and the capacity to use such characteristics To put it very accurately, biotechnology improves breeders’ capacity to produce better crops and animals.
Improvements made feasible by biotechnology are not achievable through the simple conventional crossing of related species.
WHAT ARE THE USES OF AGRICULTURAL BIOTECHNOLOGY?
- Genetic engineering: Genes may now be transferred from one organism to another by scientists. This has also been referred to as genetic engineering, genetic alteration, or genetic betterment. Whatever the nomenclature, the procedure permits the insertion of genes to transmit beneficial traits (such as disease resistance) into a plant, animal, or microorganism(DNA) from a different species. To date, nearly all crops have benefited from the transfer of DNA (often referred to as GM crops or GMOs) and have been created to help farmers boost output by decreasing crop damage caused by weeds, illnesses, or insects.
- Molecular markers: In traditional breeding, specific plants or animals are chosen based on observable or quantifiable features. Even in the absence of an obvious feature, scientists may employ molecular markers to identify plants or animals that have a desired gene by looking at their DNA.
- Breeding is, therefore, more accurate and effective.
For instance, the International Institute of Tropical Agriculture has obtained cowpea-resistant molecular markers among others, white yam resistant to illness and cassava resistant to cassava mosaic disease. bruchid (a beetle). Molecular markers can also be used to find undesirable genes that can be removed from future generations. - Molecular diagnostics: Highly accurate and targeted approaches for detecting genes or gene products are known as molecular diagnostics. Molecular diagnostics are used in agriculture to more precisely identify illnesses affecting crops and cattle.
- Vaccines: Both people and animals are immunised using vaccines created through biotechnology. They could be less expensive, superior, or safer than conventional vaccinations. Additionally, they may be stored without refrigeration at ambient temperature, which is beneficial for smallholders in tropical nations. Some are brand-new vaccinations that provide protection against some infectious diseases for the first time. For instance, in the Philippines, enhanced vaccination against hemorrhagic septicemia, the most common cause of death for both cattle and water buffalo, has been developed using biotechnology.
- Tissue culture: Tissue culture is the process of growing plants from healthy plant components in a lab. This process enables the replication of agricultural planting material free from disease. Citrus, pineapples, avocados, mangoes, bananas, coffee, and papaya are a few examples of crops that are grown using tissue culture.
IMPORTANCE OF INNOVATIONS IN AGRICULTURE
We rely on agriculture to provide us with safe, wholesome food, but present production practices run the danger of depleting and harming the natural resources that agriculture relies on.
The industry must also adjust and react to new issues affecting the world’s food systems and climate change.We can do greater and better things through innovation.
Many “process innovations” that advance production methods are made at the farm level, such as higher-yielding seeds or more effective irrigation.
“Product innovations” are new and better goods made by downstream sectors, such as healthier food options or novel chemical or medicinal formulations.
Along the whole supply chain, “marketing and organisational innovations” are likewise becoming more and more crucial.Agriculture producers may be able to use innovation to boost output while better maintaining natural resources.
This promotes sustainability over the long run and lessens production’s damaging effects on the environment, such as pollution and waste. Systems for producing sustainable agriculture also consider how to adapt to climate change and reduce greenhouse gas (GHG) emissions.
INNOVATIONS IN CROP IMPROVEMENT
GENETIC MODIFICATION FOR PEST RESISTANCE
A certain DNA sequence is inserted into agricultural plants using genetic modification to increase the plant’s resistance to insect pests. Insecticidal proteins are often encoded by the DNA sequences employed, making them present in plants having DNA inserted into them.
However, various methods for enhancing plant defences against insects have been investigated. Since its debut in 1996, genetically modified crops that produce insecticidal proteins from the soil bacteria Bacillus thuringiensis have been employed extensively in worldwide agriculture. These crops are protected against significant insect pests.
- Coding Sequence: The portion of a gene that dictates the sequence of the protein product is called the “coding sequence.”
- Domain: A section of a protein that consistently creates a unique 3-D shape even when cut off from the rest of the protein
- Genetic modification: Artificially introducing a certain DNA sequence into an organism
- Insect hierarchy: Lepidoptera includes moths and butterflies; Diptera includes flies; Coleoptera includes beetles; and Hemiptera/Homoptera includes sucking insects like aphids.
- Mutagenesis: Altering the DNA sequence, which frequently has the side effect of changing the protein sequence that the DNA specifies
- Oligomerization: Synthesis of polymers with a comparatively low number of repeating units
- Proteolysis: A proteinase causes breakage in the chain of amino acids that make up proteins.
- Transgenic: An organism into which a gene has been inserted through the use of genetic engineering
ENHANCED NUTRIENT CONTENT IN CROPS
Crops with improved nutrition have been developed to answer the need for better feed for livestock and poultry. For instance, crops for animal feed have been developed that produce larger quantities of limiting amino acids, reducing the need for supplementation. The development of feed crops has also been done to produce manure that is more ecologically friendly.
As an illustration, body weight gain in poultry and swine-given transgenic maize with a higher free lysine content grew to a level equivalent to animals on lysine-supplemented diets. Similar outcomes have been shown for animals given soybean and lupin.
Additionally, cell wall invertase-expressing transgenic maize cultivars have been created. Grain yield in transgenic maize was much higher (up to 145.3%) than in wild-type maize because of larger and more numerous grains.
Invertase’s constitutive expression boosted the total starch content of the transgenic kernels as well, proving that agricultural plants may use this gene to promote grain output and grain quality.
Genetic engineering allows for the biofortification of food crops as well as the creation of bioactive substances that have better health benefits or lower the chance of developing chronic illnesses like cancer and heart disease.
Plant seed storage oils have been studied for their potential to create new, healthy fatty acids. For instance, genetic manipulation has been used to create a range of transgenic “designer oilseed” plants that can synthesise omega-3 fatty acids, which are frequently present in fish oils.
The dietary advantages of omega-3 long-chain polyunsaturated fatty acids (omega-3-FA), such as enhancements to brain function and development as well as cardiovascular health, are of significant interest.
Due to overfishing in the seas, where the majority of omega-3 FA is found, plants are a more sustainable source of this nutrient. It is being developed to express amounts of omega-3 FA similar to those seen in marine creatures in genetically engineered plants, algae, and krill.
PRECISION FARMING TECHNOLOGIES
Utilising cutting-edge tools like field mapping or satellite images, precision farming may increase crop quality and profitability. Additionally, it makes the best use of conventional resources.
As a result, this agricultural management system helps to advance sustainable agriculture by enabling the resolution of pressing economic and ecological issues.
GPS, drones, and satellite photos are just a few of the technologies included in such a system. Farmers receive information on all important topics, such as crop status, weather forecasts, environmental changes, etc., based on this data.
Additionally, the capacity to manage fields by splitting them into various zones rather than managing them as a continuous block is another significant distinction between precision farming and traditional agriculture.
GPS-GUIDED MACHINERY FOR EFFICIENT FARMING
Global Positioning System (GPS) and Geographic Information System (GIS) integration have pushed the boundaries of agriculture’s progress even further. Particularly when it comes to improving efficiency, productivity, and sustainability in farming methods, these technologies are opening up a whole new world of possibilities.
When it comes to increasing the productivity of farming equipment, GPS technology is a game-changer. Tractors and other equipment that is GPS-guided can function accurately and precisely in any situation, day or night.
With less overlap and missing regions, there is less soil compaction, which saves time, fuel, and inputs.
SENSOR-BASED IRRIGATION MANAGEMENT
According to climate and geography, rainfall and evapotranspiration play a significant role in determining the soil’s moisture content. Soil moisture is determined by the ratio of monthly (or yearly) evaporation to precipitation.
In the aforementioned viewpoint from the regular weather reports, the ratio of daily evaporation to precipitation may also be used to determine soil moisture.
Precipitation is immediately accessible, but evaporation is generated by other metrological requirements. Different terms, such as Precision Farming, Site-Specific Crop Management, Smart Agriculture, Global Positioning Service (GPS), and Variable Rate Technology (VRT), are used to describe sensors-based irrigation.
Due to their contemporary technology and compact size, sensors may now be employed in the field of human life. Numerous sensor networking-related issues are being researched as a result of this technology.
There are several fundamental problems with sensor networks that academics throughout the world are working to address, including low memory, energy constraints, and data security.
DISEASE MANAGEMENT SOLUTIONS
Reducing the financial and aesthetically damaging effects of plant diseases is the aim of plant disease management. Plant disease control has historically been used to describe this, but modern social and environmental norms view “control” as an absolute and the phrase as being overly restrictive.
However, this mentality change has led to the development of more comprehensive and integrated illness management strategies. Single, frequently harsh procedures like applying pesticides, fumigating the land, or burning are no longer frequently used.
Furthermore, rather than using a calendar or a prescription, illness management practices are typically chosen based on disease forecasting or disease modelling.
Although it might be difficult to distinguish between the two notions, particularly when using specific treatments, disease management can be seen as proactive whilst disease control is reactive.
BIOTECH-DERIVED DISEASE-RESISTANT PLANTS
Growing and analyzing huge populations of crops over several generations is a common practice in conventional breeding, which is a time-consuming and labour-intensive operation.
Comparing genetic engineering to traditional breeding, which refers to the direct modification of an organism’s genetic code using biotechnology, there are a number of benefits to be had.
First, it makes it possible to add, remove, modify, or fine-tune certain genes of interest with a minimum of unintended modifications to the crop genome.
Consequently, compared to conventional breeding, crops displaying desirable agronomic qualities can be produced in fewer generations. Expressing in plants genes acquired from microbes that code for proteins that are recognized by the plant surveillance system and effectively evoke immune responses against pathogens (usually referred to as elicitors) is an essential technique to improve plant disease resistance.
PAMPs, avirulence effectors, HRP proteins transported via the type III secretion system, and fungal or oomycete proteins like cryptogenic and cerato-plantains are a few examples of well-characterized elicitors.
RAPID DIAGNOSTICS FOR EARLY DISEASE DETECTION
Plant infections are one of the biggest dangers to agricultural productivity and have an annual economic impact of several billion dollars on the agricultural sector.
The first step in managing plant diseases and generating high-quality crops is the accurate and quick detection of pathogens.
While some common plant diseases may be simple to spot in the field with a trained eye, many symptoms displayed by unhealthy plants could also be caused by poor growing conditions, pests, chemical damage from fertilizers or fungicides, or even multiple pathogens attacking the plant simultaneously.
Some diseases can spread quite fast if they are not identified and treated right away. The three primary techniques used by plant pathologists to determine what is causing the plant’s illness are microscopy, growth and observation on medium, and molecular studies.
SUSTAINABLE AGRICULTURAL PRACTICES
Sustainable agriculture is a method of farming that places a higher priority on natural and renewable resources than artificial inputs like pesticides and fertilizers. The Food and Agriculture Organization of the United Nations states that sustainable agriculture aims to “meet the needs of present and future generations while ensuring profitability, environmental health, and social and economic equity.”
Farms can, however, claim to be “sustainable” without providing evidence because there is minimal governmental monitoring for this activity.
REDUCED NEED FOR CHEMICAL PESTICIDES
Many pesticides have been linked to health and environmental problems, and certain pesticides are no longer used in agriculture. Pesticides can be ingested, inhaled, or applied directly to the skin.
The kind of pesticide, the length of exposure, the method of exposure, and the individual health state (such as dietary deficits and the condition of one’s skin, for example) all affect the potential health consequences.
Pesticides may be metabolized, expelled, stored, or bioaccumulated in body fat within a human or animal body. Chemical pesticides have been linked to a wide range of unfavourable health impacts, including effects on the skin, gastrointestinal system, nervous system, respiratory system, reproductive system, and endocrine system.
High levels of occupational, unintentional, or purposeful pesticide exposure can also cause illness and even death.
IMPROVED CROP QUALITY
Crop quality is the most significant economic characteristic, affecting the application value and competitiveness of goods. Higher criteria for crop quality are proposed as people’s living standards continue to rise.
To raise people’s standards of living and promote the long-term improvement of societal health, crop types that are more nutritious, more delectable, and healthier must be grown.
Due to the overemphasis on agricultural output requirements, crop quality development has, nevertheless, been progressing at a very modest rate globally.
According to the authors, there are three key factors slowing down the rate of increase in crop quality. The gene resources still aren’t plentiful, and the genetic regulatory network of desirable features is quite intricate.
CLIMATE-RESILIENT CROPS
Although it has been suggested that farmers use climate-resilient crops and crop types to deal with or adapt to climate change, acceptance rates by smallholder farmers are very varied despite the obvious advantages.
The production of food and agriculture are extremely sensitive to climate change. Extreme weather conditions, such as droughts, heat waves, and flooding, have a significant impact on food security and the fight against poverty, particularly in rural areas with large populations of small-scale farmers who are heavily reliant on rain-fed agriculture for their food and livelihoods.
Because of decreased productivity and crop failure, climate change is predicted to diminish yields of basic crops by up to 30%.
Additionally, the anticipated increase in the world’s population and dietary shifts toward greater consumption of meat and dairy products in developing nations would put even greater demands on the world’s natural resources, leading to increased food insecurity and strains on food production.
Farmers must adapt production and farm management practices to deal with climate change.
Some examples include changing planting dates, adding irrigation (when feasible), intercropping, implementing conservation agriculture, gaining access to short- and long-term crop and seed storage infrastructure, and switching crops or planting more climate-resilient crop varieties.
SMART BREEDING TECHNIQUES
Plant breeding has always been crucial to human history since it has transformed agriculture to feed the world’s expanding population. It can save people from immediate risks to agriculture caused by changing weather patterns, quickly mutating pests, and finite resources.
Every crop development initiative must necessarily focus on unlocking the genetic diversity repository and making substantial use of wild germplasm.
However, current developments in genomics, high-throughput phenomics, sequencing, and breeding techniques, as well as cutting-edge genome-editing technologies integrated with artificial intelligence, bring up new avenues for expedited development of climate-resilient crops.
In order to combat climate change and create crop types that are better suited to the changing environment, comprehensive smart breeding methods may be a feasible solution.
BIOTECHNOLOGY AND ORGANIC FARMING
According to the experts, combining organic farming with contemporary biotechnology could be a means to find a solution to this problem. Gene editing thus presents prospects to increase the sustainability of food production and to further enhance food quality and safety.
These new molecular tools can be used to create more resilient plants that produce abundant amounts of nutritious food while using less fertilizer.
Additionally, fungus-resistant plants are bred through gene editing in organic farming without the usage of herbicides that include copper.
Because there are now no non-chemical options for controlling fungus, copper is nevertheless allowed in organic farming despite being extremely hazardous to soil and aquatic species.
In order to promote the development of local biotechnologies, assure safe access to innovative technologies and products created abroad, and increase consumer trust that goods available on the market are secure, it is crucial to design an efficient national biosafety system.
The capacity of the public and commercial sectors to invest in biotechnology and to make the products of biotechnology available so that the advantages they provide may be realized is impacted by the lack of an appropriate framework.
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