The concept of artificial selection is becoming more and more common in today’s society. Artificial selection is the process of modifying a species by human intervention to ensure certain desirable qualities are represented in successive generations. By breeding the best with the best, it implies that the offspring will have superior desirable qualities. Breeders of animals and plants in the world are searching to produce organisms that process desirable characteristics, such as high growth rates, resistance to disease and other characteristics that will benefit the organism in the long run. The concept of natural selection refers to the process in nature, according to Darwin’s theory of evolution, only the organisms best adapted to their environment tend to survive and transmit their genetic characteristics in increasing numbers to succeeding generations while those less adapted tend to be eliminated. With artificial selection, we could ensure that these organisms will be able to adapt to their environment and survive. However, will this “artificial selection” disrupt the balance of nature?
For many centuries, we have been taking advantage of artificial selection. Our ancestors learned that saving seeds from the plants they wanted to continue growing would increase the chances of getting a plant similar to the original plant. They didn’t understand the process by which traits were changed or maintained, or the laws of heredity. Today, we learned much about plant reproduction and we are able to select plants for breeding with considerably more assurance of success. Many people believe that breeding new crops is important for ensuring food security by developing new varieties that are higher-yielding, resistant to pests and diseases, drought-resistant or regionally adapted to different environments and growing conditions. Many of the food that we consume are products of plant breeding. However, some people are concerned whether breeding can have a negative effect on nutrition value. There are scientific indications that, by favouring certain aspects of a plant's development, other aspects may be retarded. I personally have many questions about plant breeding, including how can we ensure that the product is edible? I don’t want to end up eating plants that I should not be eating! Most countries have regulatory processes in place to help ensure that new crop varieties entering the marketplace are both safe and meet farmers' needs.
Animal breeding requires selecting animals with superior abilities in growth rate, egg, meat, milk, wool production or have other desirable traits that will revolutionize agricultural livestock production. Some animal breeders believe in purebred, which is mating animals of the same bred for maintaining stable characteristics or traits that the parents will pass to the next generation. Does this still count towards helping animals better survive in their environment?
Artificial sounds like a great idea, but it still has its disadvantages. Some people argue that it is inhumane, can cause mutations or produce new problems. An example of the inhumane process is the new way of breeding chickens. A few years back, there was an experiment where chickens are produced without feathers. Feather-free chickens will suffer more than normal birds, for instance, males can’t mate because they cannot flap their wings or they become more vulnerable to sunburn and parasites. After all, we are producing plants and animas with the traits that we want. Is it ethically right to selective for what we want or are we affecting the natural ability of species being able to reproduce? What other problems may arise if we keep inbreeding these animals?
Breeding animals and plants to create new varieties and improve upon old ones has its advantages and disadvantages. In my opinion, I believe that artificial selection seems to be a good idea. In order to breed animals and plants successfully it is important to understand the principles of reproduction. Many problems might spring up during the process of artificial selection, but we can produce plants that are resistant to various environmental problems.
Sources:
http://library.thinkquest.org/C0118084/Gene/Genetic_variation/artificialselection.htm
http://www.biology-online.org/2/12_selective_breeding.htm
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1569519/
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