Abstract
Aneuploids with 26 to 30 chromosomes occurred in progenies of induced tetraploids of Lolium perenne in a frequency of 6 to 23% in C1 families, 12% in C2 and 6% in advanced generations. The most frequent types had 27 and 29 chromosomes. Most were apparently recovered through female transmission, which varied for aneuploid gametes with different chromosome numbers and which probably depended on the chromosome involved. In general, aneuploids showed a reduction in fertility. Even with the same chromosome number, fertility varied perhaps as a result of differences between the chromosomes involved. Aneuploids could not be distinguished from eu-tetraploids on a morphological basis. Tetraploids late and early in respect to flowering did not differ in aneuploid frequency. No reversion to diploidy was observed in successive generations.
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References
Aastveit, K. (1963). The relation between fertility and cytological properties in autotetraploid rye (abst.). Genetics Today, Proc. XI Intern. Cong. Genet. vol. 1: p. 214.
Ahloowalia, B. S. (1965). A root tip squash technique for screening chromosome number in Lolium. Euphytica 14: 170–172.
Ahloowalia, B. S. (1966). Chromosome pairing in aneuploid perennial ryegrass. J. Heredity 57: 129–134.
Ahloowalia, B. S. (1967a). Colchicine induced polyploids in ryegrass. Euphytica 16: 49–60.
Ahloowalia, B. S. (1967b). Chromosome association and fertility in tetraploid ryegrass. Genetica 38: 471–484.
Barclay, P. C. & Jean. M. Armstrong (1966). Certain aspects of chromosome number and seed size in induced tetraploids pasture plants. Proc. X. Intern. Grassl. Cong. 667–671.
Cooper, J. P. (1960). Selection for production characters in ryegrass. Proc. VIII. Intern. Grassl. Cong. 41–44.
Ellerström, S. & J. Sjödin (1966). Frequency and vitality of aneuploids in a population of tetraploid red clover. Hereditas 55: 166–182.
Essad, S., J. Arnoux & N. Maia (1966). Contrôle de validité des caryogrammes. Application au caryotype de Lolium perenne L. Chromosoma 20: 202–220.
Hagberg, A. & S. Ellerström (1959). The competition between diploid, tetraploid and aneuploid rye. Hereditas 45: 369–416.
Myers, W. M. (1939). Colchicine induced tetraploidy in perennial ryegrass. J. Heredity 30: 499–504.
Myers, W. M. (1944). Cytological studies of a triploid perennial ryegrass and its progeny. J. Heredity 35: 17–23.
Myers, W. M. (1945). Meiosis in autotetraploid Lolium perenne in relation to chromosomal behaviour in autopolyploids. Bot. Gaz. 106: 306–316.
Rommel, Mechtild. (1963). Aneuploids in some artificially induced polyploids of cultivated plants (abst.) Genetics Today, Proc. XI Intern. Cong. Genet. vol. 1: 213–214.
Roo, R. de (1968). Meïose en fertiliteit bij tetraploïd engels raaigras (Lolium perenne L.). Meded. LandbHoogesch. Opzoek Stns. Gent 33: 247–258.
Schumann, G. (1967). Vergleichende Untersuchungen an polyploiden und diploiden Lolium-Arten. I. Deutsches Weidelgras (Lolium perenne L.) Z. Pflzücht. 58: 369–382.
Wit, F. (1959). Chromosome doubling and the improvement of grasses. Genet. Agraria 11: 97–115.
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Ahloowalia, B.S. Frequency, origin, and survival of aneuploids in tetraploid ryegrass. Genetica 42, 129–138 (1971). https://doi.org/10.1007/BF00154844
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DOI: https://doi.org/10.1007/BF00154844