| 黄芩的花粉母细胞减数分裂及核型分析 |
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| 引用本文： | 程志号,蔡明历,郝大翠,邓瑞宁,刘焰.黄芩的花粉母细胞减数分裂及核型分析[J].中国野生植物资源,2010,29(2):34-37,58. |
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| 作者姓名： | 程志号 蔡明历 郝大翠 邓瑞宁 刘焰 |
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| 作者单位： | 华中农业大学药用植物研究所,湖北,武汉,430070 |
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| 基金项目： | 华中农业大学创新基金 |
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| 摘 要： | 采用压片法,对黄芩花粉母细胞减数分裂及核型进行了研究。结果表明:黄芩的大多数花粉母细胞减数分裂中染色体的行为正常,在终变期同源染色体配对后可形成9个二价体,后期Ⅰ染色体以9∶9的方式向细胞两极分离,其减数分裂为同时型;在少数花粉母细胞减数分裂中观察到落后染色体、染色体桥等异常行为;其花粉粒育性为76.49%。黄芩的染色体数目为2n=2X=18,核型公式为K(2n)=2X=18=16m+2 sm,染色体相对长度组成为2n=1 s+4M1+3M2+1L,其核型为"1A"型。
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| 关 键 词： | 黄芩 花粉母细胞 减数分裂 核型 |
Karyotype Analysis and Meiotic Observations of Pollen Mother Cells in Scutellaria baicalensis Georgi |
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| Cheng Zhihao,Cai Mingli,Hao Dachui,Deng Ruining,Lui Yan.Karyotype Analysis and Meiotic Observations of Pollen Mother Cells in Scutellaria baicalensis Georgi[J].Chinese Wild Plant Resources,2010,29(2):34-37,58. |
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| Authors: | Cheng Zhihao Cai Mingli Hao Dachui Deng Ruining Lui Yan |
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| Institution: | Cheng Zhihao,Cai Mingli,Hao Dachui,Deng Ruining,Lui Yan(Institute of Medicinal Plant,Huazhong Agricultural University,Wuhan 430070,China) |
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| Abstract: | The meiosis of pollen mother cells and karyotype analyzed for the Scutellaria baicalensis Georgi by applying squash method. The result showed that chromosomes of most pollen mother cells were paired as 9 bivalents at diakinesis and segregated as 9:9 at anaphase I. In a few (minority)pollen mother cells Lagging chromosome and chromosomal bridge were founded during meiosis. The meiotic division belongs to the simultaneous type, and the stainability of the pollen grains was 76.49%. The chromosome number was 2n = 18 and karyotype formula was K(2n) = 2x = 18 = 16m + 2sm, with constitution of relative length being 2n = 1s +4MI +3M2 + 1L, and karyotype type belonging to "1A". |
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| Keywords: | Scutellaria baicalensis Georgi karyotype meiosis pollen fertility |
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