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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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