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ARS Home » Southeast Area » Miami, Florida » Subtropical Horticulture Research » Research » Research Project #432585

Research Project: Development of New Avocado Rootstock Varieties Resistant to Phytophthora cinnamomi and Salinity Using Molecular Breeding Approaches

Location: Subtropical Horticulture Research

Project Number: 6038-21000-022-09-T
Project Type: Trust Fund Cooperative Agreement

Start Date: Nov 1, 2016
End Date: Dec 31, 2018

Objective:
The overall goal of this program is to develop and provide elite avocado rootstock material that are resistant to Phytophthora (P.) cinnamomi and tolerant to salinity to support avocado growers in California and Florida. The University of California at Riverside (UCR) has a 20 year history of avocado rootstock selection funded by the California Avocado Commission (CAC). The specific objective of this proposal is the assessment of the genetic diversity and proper identification of all UCR rootstock material using Single Nucleotide Polymorphism (SNP) molecular markers.

Approach:
1.1. Genotype at USDA-ARS SHRS all UCR avocado rootstocks (~1000 trees) using 384 SNP markers developed by an ARS scientist. 1.2. Use SNP genotypes for rootstock germplasm curation, proper identification of accessions, and genetic diversity assessment. 1.3. Improve the maintenance of the UCR rootstock germplasm collection at South Coast Research Experiment Center (SCREC).