Answer:
Thousands of years ago, plant breeding was done through traditional or conventional methods, such as selective breeding, cross-breeding, and grafting. This method involves selecting plants with desirable characteristics and breeding them with other plants to create offspring with the desired traits. It was a slow and laborious process that required a lot of time and effort.
Now, DNA technology has advanced the plant breeding by integrating genetic engineering and biotechnology software. It allows scientists to manipulate the DNA of plants directly, thus creating plants with the desired characteristics in a more efficient way. With DNA technology, it's possible to introduce specific traits into a plant's DNA or modify existing genes to create plants that are resistant to diseases, pests, and environmental stressors. This technology has led to the development of genetically modified crops that can help feed the growing population, improve food quality and increase yields.