CYTOGENETIC INVESTIGATION OF THE HYBRID BETWEEN AEGILOPS TAUSCHH AMD PSATHYROSTACHYS HUASHANICA

<正> An intergeneric hybrid between Aegilops tauschti Cosson. an annual diploid grass. and Psathyrostachys huashanica Keng, a perenmal diploid grass. The F_1 hybrid plant had chromosome number of 2n=2x=14. and was annual and morphologically intermediate between two parents. Meiotic analysis showed that this F_1 hybrid had an average of 12.20 univalants, 0.12 rod bivalents ad 0.004 quadrivalents at MI of the pollen-mother-cells. Multipolar division, irregular ctyokinesis. conjungation opening and coenocyte were observed in this hybrid. These results suggested that the D genome in the Ae. tauschii was distantly related to the N genome in the P huashanica.

CYTOGENETIC INVESTIGATION OF THE HYBRID BETWEEN AEGILOPS TAUSCHH AMD PSATHYROSTACHYS HUASHANICA

An intergeneric hybrid between Aegilops tauschti Cosson. an annual diploid grass. and Psathyrostachys huashanica Keng, a perenmal diploid grass. The F_1 hybrid plant had chromosome number of 2n=2x=14. and was annual and morphologically intermediate between two parents. Meiotic analysis showed that this F_1 hybrid had an average of 12.20 univalants, 0.12 rod bivalents ad 0.004 quadrivalents at MI of the pollen-mother-cells. Multipolar division, irregular ctyokinesis. conjungation opening and coenocyte were observed in this hybrid. These results suggested that the D genome in the Ae. tauschii was distantly related to the N genome in the P huashanica.