Abstract:

【OBJECTIVE】Male sterility and cytological features of Pyrus pyrifolia(Burm. F. ) Nakai ‘Whangkeumbae’, 【METHOD】the features of its and CK breed ’s anther were examined by the method of paraffin sectioning, and cytological features of anther and microspore in the formation process were investigated.【RESULTS】The results showed abortion mainly occurred in the late microspore stage of monocyte.【CONCLUSION】Pollen abortion was dominant reason that the separation of tetrasporophytes was formed early pollen cells, which were due to the disintegration of tapetum in advance, cork-based vascular cells. The two sides contributed to lack of nutrition coordination, resulting in pollen abortion.