Disintegration of microspores and tapetum at the same time, designated as abortion of microspores, was mainly at the late mononuclear stage of microspores of Niitaka pears.

• 结果表明，新高梨小孢子败育主要发生在单核晚期，败育主要表现为小孢子解体，绒毡层同时解体；