ISSN:
1432-2242
Schlagwort(e):
Triticum aestivum
;
Agropyron michnoi
;
Intergeneric hybrid
;
Chromosome pairing
;
Self-fertile
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Summary Intergeneric hybrids between Triticum aestivum cv ‘Chinese Spring’ (2n=6x=42, AABBDD) and Agropyron michnoi Roshev. (2n=4x=28, PPPP) were obtained by embryo culture. Their spike characteristics were similar to those of common wheat but, unlike their parents, they were long-awned. The average meiotic chromosome pairing at MI of F1 hybrids was: 6.39 I +3.75 rodII+8.64 ringII+0.81 III+0.30 IV+0.04 V, the bivalent and multivalent formation of which was much higher than expected from the genomic formulae. It is especially worthwhile to note that the F1 hybrids were self-fertile, self set being 0.15%, and seeds were easily obtained from the backcross of f1 plants with hexaploid and tetraploid wheats; here the seed set was more than 20.0%. The polyploid taxa and the position of A. Michnoi in Agropyron are discussed.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00228669
Permalink
