蓼科羊蹄减数分裂过程的观察

详细信息

Meiosis Observation of Rumex japonicus Houtt.(Polygonaceae)

摘要: 首次对蓼科酸模属植物羊蹄(Rumex japonicus Houtt.)进行了花粉母细胞减数分裂观察.减数分裂后期I和后期Ⅱ存在染色体桥、染色体断片和落后染色体等异常现象,统计各时期畸形率都低于5%.随机统计花粉粒活性,成熟率达到95%.羊蹄的减数分裂过程基本正常,也证实了羊蹄的体细胞染色体数目2n=2x=100是可信的.
- 羊蹄 /
- 减数分裂
Abstract: In this paper,the meiotic process of pollen mother cells of Rumex japonicus Houtt is reported for the first time.During anaphase I and anaphase Ⅱ,chromosomal bridge,chromosomal fragments and lagging chromosomes have been observed and the abnormality rates of both phases are less than 5%.The rate of fertile pollen grains is more than 95%,which is consistent with the cell abnormality rate at anaphase Ⅱ.These results indicate that meiotic process of R.japonicus is normal,and the somatic chromosome number 2n=2x=100 is credible.
- Rumex japonicus /
- Houtt.