Abstract
Hybrid plants were obtained in an intergeneric cross between Taenìatherum caputmedusae (2n = 2x = 14) and Triticum aestívum (2n = 6x = 42). The chromosome number was as expected 2n = 28. Morphologically the offspring looked like Triticum aestívum. Analysis of meiotic metaphase I showed an unexpected high number of bi- and trivalents which is ascribed to homoeologous pairing of chromosomes from T. aestivum. It is concluded that the genome of Taeniatherum has effects on the pairing regulation system present in T. aestívum.
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