Registration of ‘Rampart’ Wheat

Abstract

Registration of 'Rampart' Wheat Rampart, a hard red winter wheat (Triticum aestivum L.) cultivar (Reg. no. CV-845, P1593889) with tolerance to damage caused by wheat stem sawfly (Cephus cinctus Norton), was developed and released by the Montana Agricultural Experiment Station in 1996. Rampart resulted from an FS selection from the cross 'Lew'/'TiberV/'Redwin'. Lew is the source of sawfly resistance (1). Rampart was evaluated as MTS92042 in Montana Preliminary, Intrastate, and Off-Station yield nurseries from 1992 to 1996 and in the Northern Regional Winter Wheat Performance Nursery in 1996. Following selection for stem solidness and uniformity in F? headrows and Fg linerows during 1993 and 1994, 103 linerows were bulked as breeder seed. Rampart will supplement and/or replace 'Vanguard' (2), a sib selection which is currently the only other sawfly-tolerantwinter wheat availableforMontanaproducers. Rampart is a bronze-chaffed cultivar with awned spikes. Kernels are hard, red, and long, with a sloped back, a midsized germ, and a heavy brush. Kernel cheeks are rounded to angular, with an open crease. Coleoptile length of Rampart is very long, averaging 10 to 20 mm longer than the conventional-height cultivars Vanguard, Rocky, and Neeley in replicated growth chamber evaluation (dark) at 20°C for 12 d. Rampart has some field tolerance to wheat streak mosaic virus (WSMV) or its vector, wheat curl mite (Aceria tosichella Keifer), in Montana. Rampart is resistant to prevalent races of stem rust (caused by Puccinia graminis Pers.:Pers.) but susceptible to leaf rust (caused by P. recondita Roberge ex Desmaz.), stripe rust (caused by P. striiformis Westend.), dwarf bunt (caused by Tilletia contraversa Ktthn in Rabenh.), and Russian wheat aphid (Diuraphis noxia Mordvilko). Rampart is medium in maturity, heading about 1 d later than Rocky and 'Judith' but 2 to 3 d earlier than Neeley. Rampart is similar in height to Judith, Neeley, and Vanguard (86 cm, 36 environments), with a tendency to lodge, particularly in high-yield environments. Winterhardiness of Rampart is similar to Vanguard, Rocky, and 'Centurk'. Rampart expresses high levels of stem solidness in most environments, and like other solid-stemmed genotypes, shows lower levels of larval infestation, reduced feeding damage, and less head weight reduction than hollow-stemmed genotypes (3). Additionally, stem solidness reduces the numbers of larvae which cut stems and reach a successful overwintering position (3). Rampart is tolerant to feeding and cutting damage of wheat stem sawfly based on limited yield testing under moderate to heavy sawfly infestations and field-scale observation of resistance to sawfly cutting under heavy sawfly infestations. Grain yield of Rampart is slightly lower than the best hollow-stemmed cultivars in the absence of wheat stem sawfly, but equivalent or superior to most hollow-stemmed cultivars under moderate to heavy sawfly infestations. From 1993 to 1996 (36 location-years), grain yield of Rampart (3931 kg ha~') was 7,5, and 2% lower than pred...

Host selection by the wheat stem sawfly in winter wheat and the role of semiochemicals mediating oviposition preference

“…These cultivars were Norstar (CItr 17735) (Grant, 1980), BigSky (PI 619166) (Bruckner et al, 2003), Morgan (USDA-AMS, PVPO, 1997) (PI 599336), Rampart (PI 593889) (Bruckner et al, 1997), and Neeley (CItr 17860) (Sunderman, 1983). The criteria included plant height, winter hardiness, popularity among growers, presence of the sawfly resistance trait, developmental rate, and emission of the attractant (Z)-3-hexenyl acetate.…”

Registration of ‘Bynum’ Wheat

“…Bynum was derived from the cross ‘Rampart’ (PI 593889, Bruckner et al, 1997)/FS2//‘CDC Kestrel’ made in 1998. Rampart is a well‐adapted, solid‐stem cultivar released by the Montana Agricultural Experiment Station in 1996.…”

Registration of ‘Spur’ Hard Red Winter Wheat

“…al., 1997]/UT190 [1993 Western Regional Hard Red Winter Wheat Nursery entry 3, complex pedigree]). MTS0359 is an unreleased solid‐stem line of the pedigree ‘Rampart’ (PI 593889; Bruckner et al, 1997)/‘Mironovskaya 61’ (PI 592062). Spur resulted from a marker‐assisted backcross program for stem solidness conducted from 2003 to 2006 at Montana State University using two simple sequence repeat markers for solid‐stem genes located on wheat chromosomes 2B ( cdf233 ) and 3B ( gwm340 ; Cook et al, 2004).…”