Abstract
Cytology and gene expression of an amphiploid between Aegilops tauschiiL., native to China, and Secale silvestre L. were studied to reveal the genomic interaction between the donor species. High frequencies of aneuploids were observed in the progenies of the amphiploid, indicating its cytological instability. Feulgen staining and Giemsa-C banding showed that only the nucleolar organizing region from chromosome 5D of Ae. tauschii existed in the amphiploid (2n = 28). The nucleolus of S. silvestre was not observed. Endosperm storage protein electrophoresis indicated most gliadin and glutenin genes from both parents were expressed in the endosperm of the amphiploid. When inoculated by wheat stripe rust and powdery mildew isolates,the amphiploid did not express the resistance from its Secale parent,suggesting the presence of disease resistance suppressor(s) in the D genome of Ae. tauschii as well as nucleolar organizer suppressors.
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Zu-Jun, Y., Guang-Rong, L., Hua-Ren, J. et al. Expression of nucleolus, endosperm storage proteins and disease resistance in an amphiploid between Aegilops tauschii and Secale silvestre . Euphytica 119, 317–321 (2001). https://doi.org/10.1023/A:1017591519520
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DOI: https://doi.org/10.1023/A:1017591519520