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Recorded contributions to citrus breeding, introduction, and history.
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World of CitrusWorld of CitrusRecorded contributions to citrus breeding, introduction, and history.
7 credits across 4 varieties · Mikeal L. Roose
Examined fruit morphology and conducted an isozyme comparison to distinguish C-190 from the separate Hall grapefruit × trifoliate accession CRC 3821.
A UCR collection note dated December 1988 states that M. Roose checked fruit morphology and ran an isozyme test, determining this accession is distinct from CRC 3821, another Hall grapefruit × trifoliate hybrid. The note date does not establish when the checks were performed.
Riverside, California, United States
Sources: [1]
Coauthored the 1995 genetic investigation of Flying Dragon dwarfing and its probable mutational origin.
Cheng and Roose reported a five-year field comparison of Cutter Valencia trees grafted on open-pollinated Flying Dragon seedlings. The grafted trees separated into 34 dwarf and seven nondwarf trees; the authors’ marker results and segregation analysis supported a single dominant dwarfing gene in heterozygous Flying Dragon. They found Flying Dragon identical to nondwarfing trifoliate-orange accessions at the 40 tested isozyme and RFLP markers and inferred that it probably arose as a mutation without later sexual recombination.
Riverside, California, United States
Sources: [7]
Coauthored the reported evaluation of C-57 resistance to citrus nematode.
Niles, Freckman, and Roose reported C-57 in a 1995 greenhouse comparison of citrus rootstocks for resistance to citrus nematode. In the reported pot and cone experiments, C-57 showed greater resistance than the Rubidoux comparison; the authors said further trials were needed.
Riverside, California, United States
Sources: [9]
Co-developed the irradiation-derived W. Murcott selection Tango.
At Riverside, budwood from registered W. Murcott trees in Lindcove was irradiated in June 1995 with 50 Gy of Cobalt-60 gamma radiation.
Riverside, California, United States
Sources: [2]
After two fruiting seasons, the original C32-rooted tree stood out for very low seed counts, excellent fruit quality, and normal production and was selected for further trials in 1999; the patent refers to it as Tango. Buds were propagated onto Carrizo and C35 citrange rootstocks in January 2000.
Riverside, California, United States
Sources: [2]
Coauthored the release description and represented the UC Riverside rootstock-development program.
The University of California, Riverside released Furr C-57 in August 2009 as one of three new Sunki Mandarin × Swingle Trifoliate rootstocks.
Riverside, California, United States
Sources: [8]
Associated with the UC Riverside testing, evaluation, and development of C-57 before release.
West Coast Agroforestry describes C-57 as developed by the USDA program at Indio and later selected and tested at UC Riverside. The available sources do not establish an exact selection date or a single personal selector.
Riverside, California, United States