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Meiosis Stages and Their Corresponding Relation of Populus adenopoda Megasporocytes and Microsporocytes

HOU Yan-xia,KANG Xiang-yang~*(Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants,Ministry of Education,Beijing Forestry University,Beijing 100083,China)  
Meiosis stages and their corresponding relations of Populus adenopoda Maxim.megasporocytes and microsporocytes were studied.The results showed that the meiosis stages appeared to relate to flower-bud morphology to a certain extent and thus flower bud morphology could be used to determine the stages;the meiosis stages of P.adenopoda megasporocytes and microsporocytes related to each other in their occurring sequences to a certain extent and the meiosis of the megasporocytes reached its pachytene stage while the androgametes developed into the stage with their nuclei keeping to the side.Under same culture circumstances,the meiosis stages of P.adenopoda megasporocytes could simultaeously be decided by observing the developmental stages of the microspores.
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