Pear trees are often grafted, as it's a common practice in fruit tree cultivation. Grafting is a technique where a cutting, called a scion, from a desired variety of pear is attached onto the rootstock of another pear tree. This allows the tree to inherit the desired traits of the scion, such as fruit size, flavor, and disease resistance, while also benefiting from the rootstock's vigor and adaptability to soil conditions.

Hybridization is another method used in pear breeding to create new varieties with desirable traits, such as improved flavor, texture, disease resistance, or adaptability to specific growing conditions. Hybrid pear varieties are created through controlled cross-breeding of different pear cultivars.

Here are some general care tips for growing grafted or hybrid pear trees:

1. Climate: Pear trees thrive in temperate climates with cold winters and warm summers. Most pear varieties require a certain number of chill hours (hours below 45°F/7°C) during the winter to break dormancy and set fruit.

2. Soil: Plant your pear tree in well-draining soil with good fertility. Sandy loam or loamy soils are ideal. Pear trees prefer slightly acidic to neutral soil pH.

3. Watering: Provide regular watering to your pear tree, especially during dry periods and while the fruits are developing. Water deeply to encourage deep root growth, but avoid waterlogging the soil, as pear trees are susceptible to root rot.

4. Fertilization: Pear trees benefit from regular fertilization to support healthy growth and fruit production. Use a balanced fertilizer formulated for fruit trees and apply it according to the manufacturer's instructions during the growing season.

5. Pruning: Prune your pear tree annually during the dormant season to remove dead or diseased branches, improve airflow within the canopy, and maintain its desired shape and size. Pruning can also help promote fruit production and reduce the risk of pest and disease problems.

6. Pest and Disease Control: Monitor your pear tree regularly for signs of pests, such as pear psylla, codling moth, or pear rust, as well as diseases like fire blight or pear scab. Take appropriate measures, such as applying insecticides or fungicides, if necessary.

7. Harvesting: Pear fruits typically mature in late summer to early fall, depending on the variety. Harvest the fruits when they are fully ripe and have developed their characteristic color and flavor. Pears are usually harvested while still firm and allowed to ripen off the tree.

By providing proper care and attention, your grafted or hybrid pear tree can thrive and produce an abundance of delicious fruit for many years. Enjoy the process of nurturing your tree and savoring the unique flavor and texture of homegrown pears!