- Tytuł:
- Hybrids of Trifolium pratense L. [2n - 14 plus 2] with T. diffusum Ehrh. [2n - 16] and other 16-chromosome Trifolium species
- Autorzy:
- Strzyzewska, C
- Powiązania:
- https://bibliotekanauki.pl/articles/2048130.pdf
- Data publikacji:
- 1995
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
Trifolium diffusum
Trifolium pratense
hybrid
interspecific hybrid
sterility
meiosis - Opis:
- 16-chromosome forms of red clover (2n=14+2) were crossed to six Trifolium species with the chromosome number 2n=16. Hybrid plants were derived from the cross of a stable 16-chromosome red clover T. pratense with T. diffusum (2n=16). No seeds were obtained from reciprocal crosses. F₁ hybrid plants were morphologically more similar to T. diffusum, whereas their other characters, e.g. flower number per head, were intermediate between the species crossed. All F₁ hybrids had the chromosome number 2n=16. Meiosis proceeded with large irregularities. The average number of bivalents per cell was 3.32, and that of univalents - 9.98. Univalents exhibited a high stickiness and frequently formed "end-to-end" configurations and chains consisting of about a dozen of so chromosomes. Bivalents were straight. Lagging chromosomes and chromosome bridges were observed during AI; lagging chromosomes were also found during AII. After an equalizing division, tetrads and different from them microspore polyads were formed. 16-chromosome hybrids were male- and female-sterile. No hybrids were obtained from the stable 16-chromosome red clover T. pratense (n=7 chromosomes) crossed to the selected clover species (T. apertum Bobr., T. alexandrinum L. and others) with n=8 chromosomes.
- Źródło:
-
Journal of Applied Genetics; 1995, 36, 1; 35-42
1234-1983 - Pojawia się w:
- Journal of Applied Genetics
- Dostawca treści:
- Biblioteka Nauki
Artykuł