Cytogenetic investigations of primary triticales with rye or wheat hybrid parents
1991
Hesemann, C.U. | Gaus, C. (University of Hohenheim, (GERMANY). Institute of Genetics)
Triticale lines were produced with either rye or wheat hybrid parents, derived from durum wheat (T. durum) lines D9 (tetraploid) and bread wheat T. aestivum D18 (hexaploid) and from rye (Secale cereale) inbred lines L286 (Carsten rye) and L301 (Petkus rye) from Hohenheim selections. Mitotic rye chromosomes prepared from root tips were analyzed using Giemsa C-banding in rye inbred lines as well as in primary triticales. The total number of chromosomes in these plants was determined. All triticale plants having the rye hybrid parent (L286xL301) and the tetraploid wheat parent D9 were found to have 42 chromosomes in combination with 56 D18 chromosomes. Chromosomes of the two rye inbred lines could be identified in triticales with the rye hybrid parent because of their different C-banding patterns. The results of the finished investigations are in agreement with our expectations and we were able to find approximate frequencies of chromosomes of both lines in triticale having a rye hybrid parent. In triticale with a wheat hybrid parent (D18xD9), the conceivable 49 chromosomes were not found; in fact, the total number of chromosomes varied from 40-44 chromosomes. Analyzing triticales using C-banding confirmed that they contained 14 rye chromosomes but not the complete set of wheat chromosomes. Furthermore, the Giemsa banding pattern reveals differences between rye chromosomes in rye and in triticale
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