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Adaptation of Perennial Triticeae to the Eastern Central Great Plains

Kenneth P. Vogel and Kevin J. Jensen
Journal of Range Management
Vol. 54, No. 6 (Nov., 2001), pp. 674-679
DOI: 10.2307/4003670
Stable URL: http://www.jstor.org/stable/4003670
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Adaptation of Perennial Triticeae to the Eastern Central Great Plains
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Abstract

The tribe Triticeae contains over 250 perennial species that are components of grasslands in the temperate and sub-arctic regions of the world and includes some of the world's most valuable forage and rangeland species. Many of these species had not been evaluated previously in the Central Great Plains, USA. A subset of the germplasm of the tribe Triticeae which included over 100 accessions of 55 different species was evaluated in a replicated, space-planted trial in eastern Nebraska during 1994-1996 to determine the survival and forage productivity of the accessions. The evaluated accessions were representative of perennial Triticeae genera and genomes. Perennial grasses of the Triticeae are based on the P, St, H, Ns, E, W, Y genomes and an unknown Xm genome(s). Triticeae that survived and had acceptable forage yields during the period of the trial were the Agropyron's - crested wheatgrasses (PP and PPPP genomes), Psathyrostachys- Russian wildryes (NsNs genomes), Thinopyron's-intermediate and tall wheatgrasses (EEEEStSt and EEEEEEStSt genomes), some Elymus (StStHH genomes), several Leymus (NsNsXmXm genomes), and Pascopyrum-western wheatgrass (StStHHNsNsXmXm genomes). Several Leymus species had not been evaluated previously in this region but showed considerable potential and merit additional evaluation, including L. chinensis, L. akmolinensi, L. racemosus, L. sabulosus, and L. secalinus. Species with only the H genome (Hordeum) and St genome (Pseudoroegneria) were not adapted to the region because of poor survival or low productivity. The study provides an example of how the rapidly emerging field of genomics can have practical applications to grasslands and rangelands. /// La tribu Triticeae contiene más de 250 especies perennes que son componentes de los pastizales de las regiones templadas y subárticas del mundo e incluyen algunas de las especies forrajeras más valiosas del mundo. Muchas de estas especies no se han evaluadas previamente en las Grandes Planicies Centrales de Estados Unidos. Un subgrupo de germoplasma de la tribu Triticeae, el cual incluyó mas de 100 entradas de 55 especies diferentes, se evaluó en un ensayo repetido en espacio en el este de Nebraska durante 1994 a 1996 para determinar la sobrevivencia y productividad de las entradas evaluadas. Las entradas evaluadas fueron representativas de generos perennes Triticeae y genomas. Los zacates perennes de la tribu Triticeae están basados en los genomas P, St, H, Ns, E, W, Y y en un genoma(s) desconocido Xm. Los Triticeae que sobrevivieron y tuvieron rendimientos de forraje aceptables durante el período del ensayo fueron: los Agropyron's - "Crested wheatgrasses" (genomas PP y PPPP), Psathyrostachys - "Russian wildryes" (genomas NsNs), Thinopyron's- "Intermediate" and "Tall wheatgrasses" (genomas EEEEStSt y EEEEEEStSt), algunos Elymus (genomas StStHH), varios Leymus (genomas NsNsXmXm) y Pascopyrum - "Western wheatgrass" (genomas StStHHNsNsXmXm). Varias especies de Leymus no habían sido previamente evaluadas en esta región, pero mostraron un considerable potencial y merecen una evaluación adicional, incluyendo L. chinensis, L. akmolinensi, L. racemosus, L. sabulosus y L. secalinus. Especies con solo el genoma H (Hordeum) y el genoma St (Pseudoroegneria) no se adaptaron a la región debido a su pobre sobrevivencia y baja productividad. Este estudio provee un ejemplo de cómo el emergente campo de genómicos puede tener aplicaciones prácticas en los zacatales y pastizales.

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