Apomixis und umweltbedingte Variation beiPoa pratensis L

Armstrong, J. M.: A cytological study of the genusPoa. — Canadian Journ. of Research15, Sect. C; 281 bis 297 (1937). Ascherson, P. u.P. Graebner: Synopsis der mitteleuropäischen Flora. 2. Band. Leipzig. (1898–1902). Brittingham, W. H.: Type of seed formation as indicated by the nature and extent of variation in Kentucky Bluegrass, and its practical implications. — Journ. Agricult. Res.67; 225–264 (1943). Clausen, J.: New Bluegrasses by combining and rearranging genomes of contrastingPoa species. — Proc. Sixth Internat. Grassland Congress; 216–221 (1952). Hegi, G.: Illustrierte Flora von Mitteleuropa. 1. Band. München (1936). Holmberg, O. R.: Skandiaviens Flora. Häfte 2. Stockholm (1926). Jansen, P. u.W. H. Wachter: Grassen om Het Ijelmeer II. —Nederlandsch Kruidkunding Archief46, 2; 481–499 (1936). Juhl, H.: Zytologische Untersuchungen an einigen Formen vonPoa pratensis L. in Schleswig-Holstein. — Flora139; 462–476 (1952). Junge, P.: Die Gramineen Schleswig-Holsteins. — Jahrb. d. Hamburg. Wissensch. Anstalten30; 101–330 (1913). Kiellander, C. L.: Studies on apospory inPoa pratensis L. Svensk Bot. Tidskr.35, 321–332 (1941). Kiellander: A subhaploidPoa pratensis L. with 18 chromosomes and its progeny. — Svensk. Bot. Tidskr.36; 200–220 (1942). Kramer, H. H.: Morphologic and agronomic variation inPoa pratensis L. in relation to chromosome numbers. — Journ. Amer. Soc. Agronomy39; 181–191 (1947). Löve, A.: Preparatory studies for breeding icelandicPoa irrigata. — Hereditas38; 11–32 (1952). Lübbert, G.: Vergleichende cytologische, morphologische und physiologische Untersuchungen innerhalb der GattungDiplotaxis. — Beiträge z. Biologie d. Pflanzen28; 254–295 (1952). Mansfeld, R.: Verzeichnis der Farn- und Blütenpflanzen des Deutschen Reiches. — Ber. Deutsch. Bot. Gesellsch.58a. Jena (1940). Müntzing, A.: Apomictic and sexual seed formation inPoa. — Hereditas17; 131–154 (1932). Müntzing A.: Polyploidy from twin seedlings. — Cytologia, FUJII-Jubiläumsband; 211–227 (1937). Müntzing, A.: Further studies on apomixis and sexuality inPoa. —Hereditas26; 115–190 (1940). Myers, W. M.: Second generation progeny test of the method of reproduction in Kentucky Bluegrass,Poa pratensis L. — Journ. Amer Soc. Agronomy35; 413–419 (1943). Nielsen, E. L.: Cytology and breeding behavior of selected plants ofPoa pratensis. — Bot. Gaz.106: 357–382 (1945). Nielsen, E. L. u.D. C. Smith: Dimorphic panicle formation inPoa pratensis. — Bot. Gaz.12; 534–535 (1951). Nielsen, E. L. u.D. C. Smith: Interrelations of selected plant characters in Kentucky Blue-grass (Poa pratensis L.). — Bot. Gaz.114 53–62 (1952). Nissen, Ø.: Chromosome numbers, morphology, and fertility inPoa pratensis L. from southeastern Norway. — Agronomy Journ.42; 136–144 (1950). Nygren, A.: Embryology ofPoa. — Carnegie Inst. Wash. Year Book50; 113–115 (1951). Smith, D. C. u.E. L. Nielsen: Morphological variation inPoa pratensis L. as related to subsequent breeding behavior. — Journ. Amer. Soc. Agronomy37; 1033–1040 (1945). Smith, D. C. u.E. L. Nielsen: Comparative breeding behavior of progenies from enclosed and open-pollinated panicles ofPoa pratensis L. — Journ. Amer. Soc. Agronomy38; 804–809 (1946). Smith, D. G., Nielsen, E. L. u.H. L. Ahlgren: Variation and ecotypes ofPoa pratensis. — Bot. Gaz.108; 143–166 (1946). Tinney, F. W.: Cytology of parthenogenesis inPoa pratensis. — Journ. Agric. Research60; 352–360 (1940). Tinney, F. W. u.O. S. Aamodt: The progeny test as a measure of the types of seed development inPoa pratensis L. — Journ. Hered.31; 456–464 (1940). Tischler, G.: Die Chromosomenzahlen der Gefäßpflanzen Mitteleuropas. S'Gravenhage (1950). Tischler, G.: Allgemeine Pflanzenkaryologie. Ergänzungsband: Angewandte Pflanzenkaryologie (1954). Tischler, G.: Handbuch der Pflanzenanatomie II. Berlin-Nikolassee (1954). Åkerberg, E.: Studien über die Samenbildung beiPoa pratensis L. — Bot. Not.1936; 213–280 (1936). Åkerberg, E.: Seed production of thePoa species. — Herbage Reviews6; 228–233 (1938). Åkerberg, E.: Apomictic and sexual seed formation inPoa pratensis. — Hereditas25, 359–370 (1939). Åkerberg, E.: Cytogenetic studies inPoa pratensis and its hybrid withPoa alpina. — Hereditas28; 1–126 (1942). Åkerberg, E.: Further studies of the embryo- and endosperm-development inPoa pratensis. — Hereditas29; 199–201 (1943). Åkerberg, E. u.S. Bingefors: Progeny studies in the hybridPoa pratensis×Poa alpina. —Hereditas39; 125–136 (1953).