Karyological characterization of a partial amphiploid, Triticum turgidum L. var. durum × Agropyron intermedium (Host) P.B.

Schulz-Schaeffer, Jürgen; Friebe, Bernd

doi:10.1007/bf00037932

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…intermedium, was released by Montana State University in the USA as a forage crop [44]. Cytological work indicates this line carried about 28 wheatgrass chromosomes in addition to about 26 wheat chromosomes [44][45][46]. Similarly, 12G401F2 was recently developed by The Land Institute through winter durum wheat and Th.…”

Section: Wheat Derivativesmentioning

confidence: 99%

The Performance of Early-Generation Perennial Winter Cereals at 21 Sites across Four Continents

Hayes¹,

Wang

Newell

et al. 2018

Sustainability

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A network of 21 experiments was established across nine countries on four continents and spanning both hemispheres, to evaluate the relative performance of early generation perennial cereal material derived from wheat, rye, and barley and to inform future breeding strategies. The experimental lines were grown in replicated single rows, and first year production and phenology characteristics as well as yield and persistence for up to three years were monitored. The study showed that the existing experimental material is all relatively short-lived (≤3 years), with environments that are milder in summer and winter generally conferring greater longevity. No pedigree was superior across this diverse network of sites although better performing lines at the higher latitude sites were generally derived from Thinopyrum intermedium. By contrast, at lower latitudes the superior lines were generally derived from Th. ponticum and Th. elongatum parentage. The study observed a poor relationship between year 1 performance and productivity in later years, highlighting the need for perennial cereal material with greater longevity to underpin future experimental evaluation, and the importance for breeding programs to emphasize post-year 1 performance in their selections. Hybrid lines derived from the tetraploid durum wheat generally showed greater longevity than derivatives of hexaploid wheat, highlighting potential for greater use of Triticum turgidum in perennial wheat breeding. We advocate a model in future breeding initiatives that develops perennial cereal genotypes for specific target environments rather than a generic product for one global market. These products may include a diversity of cultivars derived from locally adapted annual and perennial parents. In this scenario the breeding program may have access to only a limited range of adapted perennial grass parents. In other situations, such as at very high latitude environments, perennial crops derived from barley or rye may have a better chance of success than those derived from wheat. In either case, development and selection of the perennial parent for adaptation to local environments would seem fundamental to success.

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Section: Wheat Derivativesmentioning

confidence: 99%

The Performance of Early-Generation Perennial Winter Cereals at 21 Sites across Four Continents

Hayes¹,

Wang

Newell

et al. 2018

Sustainability

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“…intermedium at Montana State University, Bozeman, MT, United States. Cytological analysis indicates that this line had 32 wheatgrass chromosomes in addition to about 24 wheat chromosomes (Schulz-Schaeffer and Friebe, 1992).…”

Section: Introductionmentioning

confidence: 93%

Development and Molecular Cytogenetic Characterization of Cold-Hardy Perennial Wheatgrass Adapted to Northeastern China

et al. 2020

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Cold-hardy perennial wheatgrass plays an important role in the use of barren land for farming, soil and water conservation, variety improvement, and also for increasing grass yield. By crossing octoploid tritelytrigia (2n = 8x = 56, AABBDDEE) with Thinopyrum intermedium (2n = 6x = 42, StStJJJ S J S ), we developed 34 lines of perennial wheatgrass from F 1 to F 6 generations, which had vigorous regrowth and cold hardiness. The cold-hardy, perennial wheatgrass lines were well-adapted to the cold environment and developed root and rhizomes, with a longevity between 5 and 11 years and a better seed set. Some of them maintained wheat chromosomes beneficial for breeding perennial wheat. Molecular cytogenetic analysis demonstrated that the Th. intermedium chromosomes contributed the most to the synthetic genome of the wheatgrass hybrids and were associated with the perennial growth habit and winter hardiness. They were also preferentially maintained and transmitted to the progenies. Some wheat chromosomes were also transmitted from the F 1 to F 6 generations, although they were eliminated in each life cycle of the wheatgrass hybrids. The numbers of wheat and Th. intermedium chromosomes affected seed set and perennial growth habit. Seed set increased with the establishment of a more balanced genomic constitution in later generations. The cold-hardy and perennial wheatgrass lines were produced, which can be the starting point of domestication effort aimed at producing well-adapted ground cover plants under extreme environments.

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C-band polymorphism and structural rearrangements detected in common wheat (Triticum aestivum)

Friebe

Gill

1994

Euphytica

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Karyological characterization of a partial amphiploid, Triticum turgidum L. var. durum × Agropyron intermedium (Host) P.B.

Cited by 6 publications

References 20 publications

The Performance of Early-Generation Perennial Winter Cereals at 21 Sites across Four Continents

The Performance of Early-Generation Perennial Winter Cereals at 21 Sites across Four Continents

Development and Molecular Cytogenetic Characterization of Cold-Hardy Perennial Wheatgrass Adapted to Northeastern China

C-band polymorphism and structural rearrangements detected in common wheat (Triticum aestivum)

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