Last edited by Pergamon
25.07.2021 | History

4 edition of Breeding pest-resistant trees found in the catalog.

Breeding pest-resistant trees

proceedings of a NATO and NSF Advanced Study Institute...

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        LC Classifications1966
        The Physical Object
        Paginationxvi, 130 p. :
        Number of Pages64
        ID Numbers
        ISBN 10nodata

        nodata File Size: 2MB.

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Breeding pest-resistant trees by Pergamon Download PDF EPUB FB2

Resistant seed lots were available for seven out of 10 breeding zones within 10 years of program initiation. Additionally, two hybrids identified through our testing on organic farms are being produced commercially for sale to growers. Scientists capture genetic material by making clonal replicates of the candidate tree through vegetative propagation generally grafting or by collecting seed from the tree.

For Objective 3 develop corn varieties that are highly productive under alternative, more environmentally sound management practicesan organic breeding nursery was grown for the first Breeding pest-resistant trees.

Long-term components of resistance breeding, such as controlled crosses and progeny testing, exceed the duration of typical university research cycles and usually depend on tree improvement cooperatives or federal agencies to address.

Breeding for Resistance to Tree Pests: Successes, Challenges, and a Guide to the Future

It may involve the presence of feeding repellents or the absence of feeding attractantsor Breeding pest-resistant trees may involve physical traits such as hairs, waxes, or a thick, tough epidermis that do not provide the pest with a desirable feeding substrate. Second, we will develop corn varieties with excellent yield potential under management practices designed with the environment in mind, such as lower nitrogen fertilizer rates and organic systems.

TARGET AUDIENCES: Corn breeders, corn seed companies, and corn farmers, including those focused on organic production. 2011 New York Hybrid Corn Grain Performance Trials. 2012: - Release new European corn borer resistant lines derived from tropical germplasm. - Release inbred 73405 with excellent northern leaf blight resistance. An additional 230 rows were used to advance conversions to three traits that may help minimize pollen contamination of organically produced field corn one that reduces competitiveness of pollen from typical dent corn hybrids and two visible markers to identify possible contamination.

In the eastern United States, where the vast majority of forest land is privately owned and national forests comprise less than seven percent of forest landresistance breeding is undertaken by a variety of state, federal, and private partners.

Our target is 300 BC3S4 families to genetically map multiple disease resistance. Conversions to three traits that may help minimize pollen contamination of organically produced field corn gametophyte factor, white cap, and brown midrib were advanced in 550 nursery rows over 3 years.

Their primary mission is to establish and train a network of partners who will share the work of establishing seed orchards, collecting seeds, and restoring sensitive habitat. By purposely selecting for plants with high levels of allelochemicals, or by breeding such plants with less resistant ones, it Breeding pest-resistant trees often possible to develop new cultivars that resist pest injury yet still retain desirable horticultural characteristics.

Plants produce a wide variety of defensive compounds allelochemicals that protect them from herbivores. sexta compared to European corn borer. Both are already known to carry high levels of GLS resistance. In addition, corn varieties increasingly need to be tailored for local conditions such as heavy manure application or organic production. Farmers will benefit from more pest resistant hybrids that reduce pest losses or expenses of pest control.

This wind damage, known as lodging, makes the corn hard to pick with mechanical harvesters. TA: What did the genetic analysis show about resistance?