%0 Journal Article
%T Studies on Karyotype of Sinojackia xylocarpa Hu and Observations on Its Meiosis of Pollen Mother Cell<br>秤锤树的核型研究及其减数分裂过程的观察
%A WANG Heng-Chang
%A HE Zi-Can
%A LI Jian-Qiang
%A MENG Ai-Ping
%A <br>王恒昌
%A 何子灿
%A 李建强
%A 孟爱平
%J 植物科学学报
%D 2003
%I 
%X The cytological characters of Sinojackia xylocarpa Hu in mitosis and meiosis were investigated. Its karyotype could be formulated as 2n=2x=24=4 m+7 sm(2SAT)+1 st,belonging to Stebbins's 2A type.The mitotic resting nucleus showed the complex chromocentre type,and at prophase there were B-chromosomes existed.The chromosomes were moderate size.At meiotic metaphase the configurations of 12 pairs of bivalents were almost common,while at anaphase I and anaphase II occurred various kinds of abnormality of chromosomal behaviour including fragment,lagging chromosome or chromosomal bridge.Statistic data showed that there was a relatively congruent occurrence between the abnormal chromosome proportion and the abortive pollen proportion,it seemed to reveal that there were some cytological factors companied with the higher pollen sterility and lower seed germination of S.xylocarpa However,the further research based on molecular genetics and pollination biology to the endangered mechanism of S.xylocarpa remained to be done.
%K Sinojackia xylocarpa
%K Karyotype
%K Meiosis
%K Pollen fertility<br>秤锤树
%K 核型
%K 减数分裂
%K 花粉育性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=9973DE552EA54506F7AABD4780345ED2&aid=F6BB73DBC7840622&yid=D43C4A19B2EE3C0A&vid=659D3B06EBF534A7&iid=38B194292C032A66&sid=FEF02B4635FE8227&eid=974CBB04624305A1&journal_id=1000-470X&journal_name=武汉植物学研究&referenced_num=11&reference_num=26