Walnut Scion & Rootstock Improvement
Walnut Scion & Rootstock Improvement
Walnut Scion & Rootstock Improvement
University of California
Walnut Scion & Rootstock Improvement

Breeding & Planting

Creating a Controlled Cross

text here overview of breeding methods

Sequence of Breeding Tasks

Fig1. Pistillate flowers prior to pollen receptivity.
Fig1. Pistillate flowers prior to pollen receptivity.
Fig. 2. Bagged pistillate flowers prevent random pollination.
Fig. 2. Bagged pistillate flowers prevent random pollination.
Fig. 3. Charles Leslie inspecting catkins processed for pollen collection.
Fig. 3. Charles Leslie inspecting catkins processed for pollen collection.

Fig. 4. Injecting pollen into isolation bag.
Fig. 4. Injecting pollen into isolation bag.
Fig. 5. Injecting pollen into isolation bag (close-up).
Fig. 5. Injecting pollen into isolation bag (close-up).
Fig. 6. Removing bags & flagging nuts from crosses.
Fig. 6. Removing bags & flagging nuts from crosses.

Fig. 7. See collected in fall harvest.
Fig. 7. See collected in fall harvest.
Fig. 8. Seeds germinated in greenhouse.
Fig. 8. Seeds germinated in greenhouse.
Fig. 9. Young trees ready for field planting.
Fig. 9. Young trees ready for field planting.

Field Plantings

Fig. 1. New field planting.
Fig. 1. New field planting.
Fig. 2. Young trees.
Fig. 2. Young trees.
Fig. 3. Charles Leslie, Program Leader
Fig. 3. Charles Leslie, Program Leader

Webmaster Email: fruitsandnuts@ucdavis.edu