Research Objectives & Teams
Identify and characterize Juglans germplasm resistant to key soil-borne pathogens.
Genetic, physical, and functional mapping of disease resistance genes and deployment of molecular markers for rapid screening of resistance.
Quantify economic impact of disease-resistant rootstocks on the U.S. walnut industry.
Conduct extension efforts that: 1) deliver disease-resistant rootstocks to stakeholders and 2) assess emerging threats to walnut rootstocks.
Project Research Teams
- We will generate, propagate, and curate open-pollinated and hybrid seedlings and clones, and coordinate with genomics and mapping team members.
We will evaluate walnut rootstock germplasm for resistance, with a focus on each of the following major diseases of walnut:
- Crown gall disease
- Phytophthora root and crown rot
- Lesion nematode
- Armillaria root disease
- We will make genetic gains in disease resistance breeding.
- We will identify the genetic loci which mediate disease resistance.
- We will assemble and analyze cost and income data from industry, nurserymen, growers and collaborating scientists.
- We will disseminate new rootstock information and conduct new rootstock orchard demonstration trials.
- We will assess the incidence and severity of TCD and LPC in walnut.
- We will roaden awareness of Juglans genotypes resistant / tolerant to TCD.