Hybrids of Trifolium pratense L. [2n - 14 plus 2] with T. diffusum Ehrh. [2n - 16] and other 16-chromosome Trifolium species

• Autorzy: Strzyzewska C
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

Trifolium diffusum; Trifolium pratense; hybrid; interspecific hybrid; sterility; meiosis

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 1995
• Tom: 36
• Numer: 1
• Opis fizyczny: p.35-42,fig.

Twórcy

autor

Strzyzewska C

• Institute of Plant Genetics, ul.Strzeszynska 34, 60-479 Poznan, Poland

Bibliografia

• KAZIMIERSKI I., KAZIMIERSKA E.M., STRZYŻEWSKA Cz. (1972). Species crossing in the genus Trifolium L. Genet. Pol. 13: 11-32.
• KENDALL W.A., TAYLOR N.L. (1965). Growth of red clover pollen. Crop. Sci. 5: 241-243.
• SCHWER J.F., CLEVELAND R.W. (1972). Diploid interspecific hybrids of Trifolium pratense L., T. diffusum Ehrh., and some related species. Crop. Sci. 12: 321-324.
• STRZYŻEWSKA CZ. (1974). Sib-mating in Trifolium pratense L. I. Some morphological traits; properties of euploids, aneuploids and polyploids. Genet. Pol. 15: 255-293.
• STRZYŻEWSKA CZ. (1976). Sib-mating in Trifolium pratense L. II. Cytogenetics of euploids, aneuploids and polyploids. Genet. Pol. 17: 497-516.
• STRZYŻEWSKA CZ. (1984). Spontaneous changes in genome of red clover (Trifolium pratense L.). II. Tetrasomity. Morphological characters and ferility. Genet. Pol. 25: 367-374.
• ŚNIEŻKO R., WINIARCZYK K. (1993). Znamię a pyłek - przegląd prac dotyczących zgodnego zapylenia. Wiad. Bot. 37: 31-34.
• TAYLOR N.L., STROUBE W.N., COLLINS G.B., KENDALL W.A. (1963). Interspecific hybrization of red clover (Trifolium pratense L.). Crop. Sci. 3: 549-552.
• WOJCIECHOWSKA W. (1989). Receptywna powierzchnia znamienia słupka kwiatowego. Wszechświat 90: 157-160.