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植物研究 ›› 2006, Vol. 26 ›› Issue (4): 442-446.doi: 10.7525/j.issn.1673-5102.2006.04.023

• 论文 • 上一篇    下一篇

应用原位杂交技术对小麦—黑麦代换系间杂交的细胞遗传研究

钟 莉   

  1. (浙江工业大学生物与环境工程学院,杭州 310014)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-07-20 发布日期:2006-07-20
  • 通讯作者: 钟 莉
  • 基金资助:
     

Hybrids of wheat-rye substitution lines 5A/5R× 6A/6R by genome in situ hybridization

ZHONG Li   

  1. (The College of Biological and Environmental Engineering,Zhejiang University of Technology,Hangzhou 310014)
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-07-20 Published:2006-07-20
  • Contact: ZHONG Li
  • Supported by:
     

摘要: 应用原位杂交技术结合染色体组型分析方法,对两个小麦-黑麦异源双代换系5R/5A和6R/6A杂交后代的遗传进行了研究,探讨同祖染色体配对的可能性并获得小麦-黑麦易位系。实验中对杂种F1代植株减数分裂各时期的花粉母细胞染色体行为进行分析,结果发现有22.91%的花粉母细胞中黑麦染色体与小麦染色体发生同祖配对。F2代通过C-分带、原位杂交鉴定,在45株中检测到9株易位,易位频率为20%,是目前报道易位频率最高的。染色体易位有的来源于同祖配对交换,有的来源于单价体错分裂或断裂的重建。

关键词: 代换系, 易位系, 减数分裂, 原位杂交, 同祖配对

Abstract: Genome in situ hybridization and C-banding were applied to study the hybrids of two wheat-rye substitution lines 5A/5R and 6A/6R , the mechanism of homoeologous chromosome pairing was clarified and wheat-rye translocation lines was created. The chromosome behavior of pollen mother cell (PMCs) in meiosis was investigated in hybrid F1, homeologous chromosome pairing between wheat and rye occurred in 22.9% of PMC. Wheat-rye translocation lines were indentified via C-anding and Genome in situ hybridization (GISH) in hybrid F2 and later generations. In F2 generation, translocations happened in 9 of 45 plants, reached to 20%. These translocation lines were generated from homeologous chromosome pairing, or mis-division and reconstruction of univalent chromosomes.

Key words: wheat-rye substitution line, translocation, meiosis, GISH, homoeologous pairing

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