Flordaguard Peach Rootstock

Abstract

The three commonly used root-knot resistant peach rootstock Nemaguard, Nemared, and Okinawa are deficient in one or more desirable characters for areas with mild winters and sandy soils, such as are found in Florida. These rootstock are susceptible to Meloidogyne incognita (Kofoid and White) Chitwood race 3 root-knot nematode. Nemaguard and Nemared require more winter chill for proper fruiting than occurs in Florida. Okinawa has a low-chill requirement but produces an undesirable high percentage of double-seeded pits. Nemared has red leaves, an aid in debudding of green-leaved cultivars. Flordaguard has improved root-knot nematode resistance and single-seeded pits, and is low-chilling and red-leaved. It is released by the Univ. of Florida Agricultural Experiment Station for grower trial and is expected to become a standard peach rootstock for low-chill peach production in rootknot nematode infested nonalkaline soils.

Advanced generation peach-almond hybrids as seedling rootstocks for almond: first year growth and potential pollenizers for hybrid seed production

“…We estimated the Wrst bloom of 'Flordaguard' to require an average of 314 chill hours between 7 and 0°C prior to the accumulation of 2,522 growing degree hours above 7°C. The chill hour requirement we estimated for 'Flordaguard' agrees well with the published requirement of »300 h, based on Xowering times of standard cultivars planted in regions of known chill (Sherman et al 1991). Chill hours required for normal Xowering of 'Tsukuba No.…”

“…For this reason, a visual marker was needed that could distinguish desired hybrid seedlings from those produced by unknown outcrossing on the male-sterile mother trees. The homozygous dominant red-leafed rootstocks 'Flordaguard' (Sherman et al 1991) and 'Tsukuba No. 4' (Yoshida and Seike 1981), both of which are resistant to root-knot nematodes Meloidogyne incognita (Kofoid and White) Chitwood and M. javanica (Treub) Chitwood, were therefore evaluated as potential pollenizers for the mother trees.…”

Identification and isozyme characterisation of Meloidogyne spp. infecting horticultural and agronomic crops, and weed plants in Florida

“…and S. melongena), a fruit tree on M. incognita-resistant peach rootstock cv. Flordaguard (Prunus persica) (Sherman et al, 1991) and only one weed species (Emilia sonchifolia). To our knowledge, all these plants, except S. esculentum, are new host records for this nematode (Church, 2005).…”

Inheritance of resistance to the peach root‐knot nematode (Meloidogyne floridensis) in interspecific crosses between peach (Prunus persica) and its wild relative (Prunus kansuensis)

“…comm .). ‘Flordaguard’ peach was previously reported to be resistant to MF (Nyczepir et al., ; Sherman et al., ). However, in the present study, ‘Flordaguard’ was designated as homozygous‐susceptible because the “MFGnv14” isolate is capable of infecting and reproducing on the rootstock.…”

“…The use of resistant rootstocks for stone fruits has been considered as a viable alternative to chemical control of RKNs, which can cause major economic losses if not effectively managed (Nyczepir, ). Peach rootstocks with resistances to MI and MA such as ‘Okinawa’ and ‘Nemaguard’ were introduced in the United States (USA) in 1950s and improved breeding selections with additional resistance to MJ such as ‘Nemared,’ ‘Guardian’ and ‘Flordaguard’ were released in early 1980s and 1990s (Okie, Beckman, et al., ; Ramming & Tanner, ; Sharpe, ; Sherman, Lyrene, & Sharpe, ). ‘Flordaguard’ offers a higher level of resistance to RKN than the other sources; since its release in 1991, it has been the only commercially viable rootstock for peach production under Florida's subtropical climate because it is adapted to a low‐chill environment and performs well in nonalkaline soils infested with the endemic peach root‐knot nematode, M. floridensis (MF) (Nyczepir, Beckman, & Reighard, ; Olmstead, Chaparro, & Ferguson, ; Sherman et al., ).…”