CULTIVAR DEVELOPMENT: ACCELERATED INTROGRESSION OF SYNTHETIC HEXAPLOID DERIVED DIVERSITY INTO AN APPLIED HARD WINTER WHEAT BREEDING PROGRAM

Research Goal: The main goal of this project is to identify a potential link between root traits of apple rootstock genotypes and rapid decline of apple trees, and determine optimal root spacing to maximize resource uptake and minimize competition under high density plantings for increased productivity of apple orchards.Specific Objectives:1) Establishing the role of root traits of two major rootstocks in the rapid decline of apple trees in high density orchards.2) Assessing the influence of viruses on root traits of apple trees grafted onto two major rootstocks in high density orchards.3) Characterization of root traits and root growth rate over time in controlled conditions for optimal spacing and resource uptake for high density orchards.4) Analyzing research results to circumscribe the role of rootstock roots in rapid decline of apple trees and identify management solutions.5) Dissemination of results to apple grower communities, nurseries, extension educators and service providers.