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《Journal of Huazhong Agricultural University》 2009-01
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Karyotype Analysis and Meiotic Observations of Pollen Mother Cells on Scutellaria barbata D.Don

DU Yu-juan CHENG Zhi-hao WANG Mo CAI Ming-li HAO Da-cui LIU Yan(College of Plant Science and Technology,Huazhong Agricultural University,Wuhan 430070,China)  
The meiosis of pollen mother cells and karyotype are studied by a medical plant of Scutellaria barbata D.Don,applying squash method.The result showed that the chromosomes of most pollen mother cells behaved normally during the meiotic divisions.There are 13 bivalents at diakinesis.The meiotic division belongs to the simultaneous type,and the fertility rate of the pollen grain is 98.4%.The number of Scutellaria barbata D.Don chromosome is 2n=2x=26.Its karyotype formula is K(2n)=2x=26=20m+4sm+2st and belongs to the type of "2B".The chromosomal absolute length ranges from 1.49 to 4.24 μm,constitution of relative length is 2n=8S+8M1+4M2+6L.The chromosomal characteristics prove that the Scutellaria barbata D.Don belongs to more advanced species.
【Fund】: 国家十一五科技支撑计划项目(2006BAI)资助
【CateGory Index】: S567.239
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