Abstract
Elymus tschimganicus andE. glaucissimus are hexaploids (2n = 6x = 42) that inhabit stony slopes and swales in the middle and upper mountain belts of Central Asia. Chromosome pairing at metaphase I inE. tschimganicus andE. glaucissimus was typical of otherElymus hexaploids, averaging 20.94 and 20.98 bivalents per cell, respectively. Meiotic pairing of tetraploid hybrids derived by crossingE. tschimganicus andE. glaucissimus withP. spicata (2n = 2x = 14; genome = SS) averaged 4.97 and 4.90 bivalents per cell respectively, indicating the presence of the S genome in the target taxa. Pentaploid hybrids derived by crossingE. tschimganicus andE. glaucissimus with tetraploid analyzer speciesE. mutabilis andE. sibiricus (2n = 4x = 28; genome = SSHH) had mean bivalent frequencies of 5.61 and 4.64 respectively, suggesting the absence of the H genome in the target taxa. Mean bivalent associations were similar among hybrids derived by crossing the target taxa withE. nevski (2n = 4x = 28; genome = SSYY), which averaged 10.61 and 11.42 bivalents, respectively, suggesting the presence of the Y genome inE. tschimganicus andE. glaucissimus. Based on chromosome pairing in the hybrids, the genomic formula for bothE. tschimganicus andE. glaucissimus should be SSSSYY.
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References
Dewey DR (1972) Genome analysis of South AmericanElymus patagonicus and its hybrids with two North American and two AsianAgropyron species.Bot Gaz 133: 436–443.
Dewey DR (1974) Cytogenetics ofElymus sibiricus and its hybrids withAgropyron tauri, Elymus canadensis, andAgropyron caninum.Bot Gaz 135: 80–87.
Dewey DR (1979) Cytogenetics, mode of pollination, and genome structure ofAgropyron mutabile.Bot Gaz 140: 216–222.
Dewey DR (1980a) Cytogenetics ofAgropyron ugamicum and six of its interspecific hybrids.Bot Gaz 141: 305–312.
Dewey DR (1980b) Cytogenetics ofAgropyron drobovii and five of its interspecific hybrids.Bot Gaz 141: 469–478.
Dewey DR (1984) The genomic system of classification. A guide to intergeneric hybridization with the perennial Triticeae. In: JP Gustafson, ed.Gene manipulation in plant improvement. 16th Staddler Genetics Symposium. New York: Plenum Publishing Corp, pp. 209–280.
Jensen KB (1990a) Cytology, fertility and morphology ofElymus kengii (Kent) Tzvelev andE. grandiglumis (Keng) A. Löve (Poaceae: Triticeae).Genome 33: 563–570.
Jensen KB (1990b) Cytology and Taxonomy ofElymus kengii, E. grandiglumis, E. alatavicus andE. batalinii (Triticeae: Poaceae).Genome 33: 668–673.
Jensen KB, Chen SL (1992) An Overview: systematic relationships ofElymus andRoegneria.Hereditas 116: 127–132.
Jensen KB, Hatch SL (1988) Cytology ofElymus panormitanus and its F1 hybrids betweenPseudoroegneria spicata, E. caninus, andE. dentatus ssp.ugamicus.Genome 30: 879–884.
Jensen KB, Wang R R-C (1991) Cytogenetics ofE. caucasicus andE. longearistatus (Triticeae: Poaceae).Genome:34: 860–867.
Jensen KB, Dewey DR, Asay KH (1986) Genome analysis ofElymus alatavicus andElymus batalinii.Can J Genet Cytol 28(5): 771–777.
Jensen KB, Zhang YF, Dewey DR (1990) Mode of pollination of species in genomically defined genera of the perennial Triticeae.Can J Plant Sci 70: 215–225.
Linnaeus C (1753) Species plantarium.-Laurentii Salvii, Holmiiae.
Lu B-R, Salomon B (1992) Differentiation of the SY genomes in AsiaticElymus.Hereditas 116: 121–126.
Lu B-R, von Bothmer R (1990) Intergeneric hybridization betweenHordeum and AsiaticElymus.Hereditas 112: 109–116.
Lu B-R, von Bothmer R (1992) Interspecific hybridization betweenElymus himalayanus andE. schrenkianus, and otherElymus species (Triticeae: Poaceae).Genome 35: 230–237.
Rohlf EF (1993) NTSYS-pc numerical taxonomy and multivariate analysis systems. Exeter Software. New York: Setauket.
Stebbins GL, Pun FT (1953) Artificial and natural hybrids in the Gramineae Tribe Hordeae. V. Diploid hybrids ofAgropyron.Am J Bot 40: 444–449.
Torabinejad J, Mueller RJ (1993) Genome constitution of the Australian hexaploid grassElymus scabrus (Poaceae: Triticeae)Genome 36: 147–151.
Torabinejad J, Carman JG, Crane CF (1987) Morphology and genome analysis of interspecific hybrid ofElymus scabrus.Genome 29: 150–155.
Tzvelev NN (1976) Tribe 3. Triticeae Dum. In: Fedorov AA, ed.Poaceae. Leningrad: URSS Nauka Publishing House, pp 146–298.
Wang R R-C (1990) Comparative chromosome pairing in triploids and diploids of perennial Triticeae.Genome 33: 89–94.
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Cooperative investigation of the USDA - Agricultural Research Service and the Utah Agricultural Experiment Station, paper no 4431.
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Jensen, K.B., Liu, ZW., Lu, BR. et al. Biosystematic study of hexaploidsElymus tschimganicus andE. glaucissimus. I. Morphology and genomic constitution. Chromosome Res 2, 209–215 (1994). https://doi.org/10.1007/BF01553321
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DOI: https://doi.org/10.1007/BF01553321