PRODUCTION AND CYTOGENETICS OF INTERGENERIC HYBRIDS BETWEEN TRITICUM-DURUM - DASYPYRUM VILLOSUM AMPHIDIPLOID AND PSATHYROSTACHYS HUASHANICA

Intergeneric crosses between Triticum durum - Dasypyrum villosum (2n = 42, AABBVV), and Psathyrostachys huashanica (2n = 14, (NNh)-N-h) were made, the seed set was 1.67%. Intergeneric hybrid were successfully o btained by means of embryo culture for first time. The average chromos ome pairing in the hybrid (ABVN(h)) was 26.61% univalents, and 0.69 bi valents. The chiasmata per cell was 0.69. The chiasmata was higher tha n that in Triticum durum dihaploid (AB), and lower than that in T. dur um-Dasypyrum villosum trihaploid (ABV). The result indicated that the N-h genome of Psathyrostachys huashanica has no homology with the V ge nome of Dasypyrum villosum, and the A and B genomes of Triticum durum. The coenocytism, micronuclei cell and variation in chromosome numbers were also observed. The F-1 hybrid was crossed with Triticum aestivum (AABBDD), and resulted in seed set. The hybrid of T. durum - D. villo sum amphidiploid x P. huashanica showed partial fertility. It made the possibility for chromosome manipulation among Triticum aestivum, Dasy pyrum villosum and Psathyrostachys huashanica.