| Abstrakt: |
Abstract: Allopolyploids were raised by oolchicine treatment of vegetative buds in the triploid hybrid of tetraploid Phaseolus species x P. calcaratus cross. They had 70 per cent pollen fertility and produced many viable seeds. The average chromosome configuration per cell at MI in them was 1.56IV + 0.01m + 29.30II + l.llr. It has been concluded that the increased fertility in allopolyploids was due to more regular meiosis and the low frequency of quadrivalents indicated the occurrence of preferential pairing. |
