what is selechiev breeding ? how does it help increasing production
Answers
Selective breeding is when humans breed plants and animals for particular genetic characteristics so that they are different to their actual wild ancestors and are now beneficial to humans.
Darwin wondered if a similar process could happen naturally to produce new species through natural selection. In selective breeding characteristics are chosen by humans rather than the environment, so it is sometimes called artificial selection.
Selective breeding takes place over many generations. The main steps for both plants and animals involve:
Decide which characteristics are important enough to select.
Choose parents that show these characteristics from a mixed population. They are bred together.
Choose the offspring with the desired characteristics. Breed these together to produce the next generation.
Repeat the process continuously over many generations, until all offspring show the desired characteristics.
The new varieties may be economically important. For example, they may provide more or better quality food, or allow farmers to feed more people. Farmers selectively breed different types of cows in order to produce the best meat and dairy products.
Desired characteristics in plants:
disease resistance in food crops
wheat plants that produce lots of grain
large or unusual flowers
Desired characteristics in animals:
animals that produce lots of milk or meat
chickens that lay large eggs
domestic dogs that have a gentle nature