PRODUCTION AND EVALUATION OF CITRUS SOMATIC HYBRID ROOTSTOCKS: PROGRESS REPORT

GROSSER, J. W.

Abstract


A major goal of the citrus cultivar improvement program at the CREC continues to be to combine all necessary disease and pest resistance into high-yielding, cold-hardy, horticulturally desirable rootstocks adapted to the various environmental conditions that exist in Florida. Improved rootstocks should also produce trees of optimal size to minimize harvesting costs and facilitate cold-protection via microsprinklers. Somatic hybrids produced at the CREC include at least 22 intergeneric hybrids from sexually compatible parents, 15 intergeneric hybrids from sexually incompatible parents, and 46 interspecific hybrids. Two main strategies utilizing somatic hybridization are being employed to develop improved rootstocks for Florida. One strategy is to combine existing rootstocks that exhibit complementary traits. A second strategy involves the wide hybridization of Citrus with related genera in efforts to expand the germplasm base for citrus rootstock improvement. Somatic hybrids produced using these strategies have been propagated and are being evaluated for disease, nematode, and pest resistance, and commercial rootstock potential. Descriptions of the somatic hybrids produced for rootstock improvement to date along with preliminary information from field trials will be presented.

Keywords


disease resistance; protoplast fusion; tissue culture; tree size control

Full Text:

PDF

Refbacks

  • There are currently no refbacks.


Proc. Fla. State Hort. Soc.     ISSN 0886-7283