Standard karyotype of Triticum searsii and its relationship with other S-genome species and common wheat
1995
Friebe, B. | Tuleen, N.A. | Gill, B.S. (Kansas State Univ., Manhattan Hall (USA). Wheat Genetics Resource Center. Dept. of Plant Pathology)
C-banding polymorphism was analyzed in 14 accessions of Triticum searsii from Israel, and a generalized idiogram of the species was established. One accession was homozygous for whole arm translocations TIS(S)S 4S(S)S and TIS(S)L 4S(S)L. C-banding analysis was also used to identify 7 Triticum aestivum cv 'Chinese Spring'-T. searsii disomic chromosome addition lines, 14 ditelosomic chromosome addition lines, 21 disomic whole chromosome, and 31 ditelosomic chromosome substitution lines. The identity of these lines was further confirmed by meiotic pairing analysis. Sporophytic and gametophytic compensation tests were used to determine the homoeologous relationships of the T. searsii chromosomes. The results show that the T. searsii chromosomes do not compensate well for their wheat homoeologues. The C-banding patterns of T. searsii chromosomes are distinct from those of other S-genome species and from the B-genome chromosomes of wheat, indicating that T. searsii is not a direct B-genome donor species of Triticum turgidum and Triticum aestivum.
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