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Frequency, origin, and survival of aneuploids in tetraploid ryegrass

✍ Scribed by B. S. Ahloowalia

Book ID
104646071
Publisher
Springer Netherlands
Year
1971
Tongue
English
Weight
449 KB
Volume
42
Category
Article
ISSN
0016-6707

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✦ Synopsis

Aneuploids with 26 to 30 chromosomes occurred in progenies of induced tetraploids of Lolium perenne in a frequency of 6 to 23% in Cl families, 12% in Cs 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.

πŸ“œ SIMILAR VOLUMES

Selection in tetraploid rye. III. Freque
Selection in tetraploid rye. III. Frequency and performance of aneuploids
✍ M. Gul Hossain πŸ“‚ Article πŸ“… 1978 πŸ› Springer 🌐 English βš– 445 KB

Aneuploidy was studied in populations selected for high seed-set with regular meiosis and low -seedset with irregular meiosis and an unselected population of the same origin. The frequency of aneuplaids was significantly reduced in the high population that was characterised by increased bivalent fre