摘要
对太行菊和芙蓉菊花粉母细胞减数分裂过程进行了研究。结果表明:太行菊和芙蓉菊减数分裂过程基本正常,为同时型胞质分裂。减数分裂中期Ⅰ染色体基本构型为9个二价体,其中太行菊和芙蓉菊每个花粉母细胞(PMC)平均染色体配对构型分别为0.05Ⅰ+8.92Ⅱ+0.03Ⅳ和0.04Ⅰ+8.61Ⅱ+0.02Ⅲ+0.17Ⅳ;部分花粉母细胞后期Ⅰ和后期Ⅱ及末期Ⅰ和末期Ⅱ发现有染色体桥、落后染色体、微核及不同步分裂等减数分裂异常现象。
Meiosis behaviors in the Opisthopappus taihangensis （Ling） Shih and Crossostephium chinense （L.） Makino were investigated for the first time. The results showed that meiosis of pollen mother cell （PMC） was overall normal and simuhaneous cytokinesis. The chromosome pairing configurations at meiotic metaphase I per PMC in Opisthopappus taihangensis （Ling） Shih and Crossostephium chinense （ L. ） Makino, with the commonest configurations of 9 bivalents （9 Ⅱ ）, were 0. 05 Ⅰ ＋ 8. 92 Ⅱ ＋0.03 Ⅳ and 0. 04 Ⅰ ＋8.61Ⅱ ＋0.02Ⅲ＋0. 17Ⅳ, respectively. A few of chromosome bridges and laggard chromosomes were found in some PMCs at anaphase Ⅰ and Ⅱ ; moreover, micronucleus and nonsynchronous division were also observed in several ceils at telophase Ⅰ and Ⅱ.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2009年第4期43-46,共4页
Journal of Nanjing Agricultural University
基金
教育部新世纪优秀人才支持计划项目(NCET-06-0489)
国家科技支撑计划项目(2006BAD01A18)
上海市农委重点攻关项目(沪农科攻字(2006)第4-3号)
关键词
太行菊
芙蓉菊
减数分裂
Opisthopappus taihangensis （Ling） Shih
Crossostephium chinense （ L. ） Makino
meiosis
