Registration of ‘Newhy’ RS Hybrid Wheatgrass

Asay, K. H.; Dewey, Douglas R.; Horton, W. H.; Jensen, Kevin B.; Currie, Pat O.; Chatterton, N. J.; Hansen, W. T.; Carlson, J. R.

doi:10.2135/cropsci1991.0011183x003100050075x

Cited by 18 publications

(13 citation statements)

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“…A. Love], a perennial grass with good nutrition and palatability (Dewey 1967;Asay et al 1991). NewHy was synthetically developed by crossing quackgrass [Elytrigia repens (L.) Nevski] with bluebunch wheatgrass [Pseudoroegneria spicata (Pursh.)…”

mentioning

confidence: 99%

Emergence, height, and yield of tall, NewHy, and green wheatgrass forage crops grown in saline root zones

Steppuhn¹,

Asay²

2005

Can. J. Plant Sci.

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. 2005. Emergence, height, and yield of tall, NewHy, and green wheatgrass forage crops grown in saline root zones. Can. J. Plant Sci. 85: 863-875. The salinity tolerance of a crop relates to its inherent ability to yield economic product while subjected to root-zone salinity. Tall wheatgrass [Thinopyrum ponticum (Podp.) Liu & Wang, previously Agropyron elongatum (Horst.) Beauv.] ranks as one of the most salt-tolerant forage crops, but producers feeding or grazing livestock with it often report of its poor palatability. NewHy [Elytrigia repens (L.) Nevski × Pseudoroegneria spicata (Pursh.) A. Love] and green wheatgrasses (Elymus hoffmannii Jensen and Asay) are new forages with potentially better palatability. In order to determine the responses of these forages to saline rooting media, two tests were conducted in Canada's Salinity Tolerance Testing Facility. The plants were grown in sand tanks flushed four times daily with hydroponic solutions consisting of nutrients and salts dominated either by chloride ions measuring from 1.5 to 48 dS m -1 or by sulphate ions from 1.5 to 50 dS m -1 . In the chloride test, maximum emergence-survival, emergence rate, and emergence at the time of maximum rate for Orbit tall wheatgrass differed significantly from green wheatgrass (Breeding Strain A6) and NewHy. The maximum percent emergence and survival within the range of test salinity levels averaged 93, 88, 86% for tall, NewHy, and Strain A6 wheatgrasses, respectively. In the sulphate test, maximum percent emergence-survival averaged 94, 91, and 87% for Orbit tall wheatgrass and green wheatgrass breeding strains A6 and S2 across the eight salinity levels of the test. Relative crop heights at harvest did not differ significantly among the test forages in either test. In the chloride test, shoot biomass yields relative to the salt-free production analysed by the modified-discount equation resulted in salinity-tolerance-indices of 11.2, 5.7, and 12.9 for tall, NewHy, and green wheatgrasses, respectively. In the sulphate test, salinity-tolerance indices for the tall wheatgrass, A6 and S2 green wheatgrass strains registered 11.7, 12.8, and 12.5, respectively. This and the covariance yield analyses based on paired t-tests lead to the inference that the salinity tolerance for both strains of green wheatgrass equalled that of the Orbit tall wheatgrass and exceeded that of the NewHy. Producers will soon have the option of growing AC Saltlander, a variety of green wheatgrass (Strain S2), which has just been released for commercialization and seed increase. For personal use only.

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confidence: 99%

Emergence, height, and yield of tall, NewHy, and green wheatgrass forage crops grown in saline root zones

Steppuhn¹,

Asay²

2005

Can. J. Plant Sci.

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“…Four additional cycles were required to achieve the desired agronomic performance. Breeding objectives were to combine the vegetative vigor, salinity tolerance, and grazing tolerance of quackgrass with the caespitose growth habit, drought resistance, and forage quality attributes of bluebunch wheatgrass (ASAY et al 1991b).…”

Section: Interspecific Hybridizationmentioning

confidence: 99%

Breeding potentials in perennial Triticeae grasses

Asay

2008

Hereditas

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Perennial Triticeae species comprise some of the most valuable grasses in the temperate regions of the world. In addition, they have been a source of genes for pest resistance and other traits in wide hybridization programs to improve cultivated cereal crops. Intense breeding efforts have been restricted primarily to species of Agropyron (Gaertn.), Psathyrostachys Nevski, Thinopyrum Love, Leymus Hochst., Elymus L., and Pseudoroegneria (Nevski) Love. Crested wheatgrass (Agropyron ssp.) has received the most attention in breeding programs as evidenced by the release of several improved cultivars. Stand establishment vigor of Russian wildrye, Psathyrostachys juncea (Fisch.) Nevski, has been substantially increased through breeding, and selection for improved forage quality and disease resistance has been effective in intermediate wheatgrass, Thinopyrwn intermedium (Host) Barkw. & Dewey. Interspecific hybridization is a promising breeding procedure in the perennial Triticeae. The recently released cultivars 'Hycrest' and 'NewHy' are notable examples of progress through interspecific hybridization. 'Hycrest' was derived from hybrids between induced tetraploid Agrop,yron cristatum (L.) Gaertn. and natural tetraploid Agropyron desertorum (Fisch. ex Link) Schultes. The parentage of 'NewHy' traces to hybrids between quackgrass, Elytrigia repens (L.) Nevski, and bluebunch wheatgrass, Pseudoroegneria spicata (Pursh) Love. Genetic progress through induced amphiploidy has also been reported. Continued success in breeding programs will be accelerated by expanded plant exploration efforts along with improved technology and breeding methods.

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“…NewHy was derived from a hybrid between quackgrass [Elytrigia repens (L.) Nevski] and bluebunch wheatgrass and released in 1989 (Asay et al, 1991). It is now described as Elymus hoffmannii (Jensen & Asay).…”

Section: Newhyörs Hybrid Wheatgrassmentioning

confidence: 99%