数字农科院2.0

单胚清见橘橙×椪柑产生高比例多胚种子及多胚有性的分子检测

文献类型: 中文期刊

作者: 洪棋斌;李喜庆;江东;陈竹生;向素琼;龚桂芝;叶庆亮

作者机构:

关键词: 柑橘;多胚;RAPD;育种

期刊名称:中国农业科学

ISSN: 0578-1752

年卷期: 2003 年 36 卷 07 期

页码: 829-833

收录情况: 北大核心 ; CSCD

摘要: 多胚现象是柑橘研究及育种实践中一个重要问题。为了避开珠心胚的干扰 ,育种实践中常采用单胚材料作母本。清见橘橙是柑橘杂交育种中一个比较优良的单胚材料 ,以其为母本配制了 7个杂交组合。当父本为强德勒柚和塔罗科血橙时 ,只产生单胚种子 ;父本为脐血橙梨形橙和冰糖橙时 ,产生较低比例的多胚种子 ,为 3.5 %~7.2 %;而以新生系 3号柑和太田柑为父本时 ,则产生高比例的多胚种子 ,达 2 8.4%~ 44 .2 %。通过连续 2年杂交试验 ,发现清见×柑产生高比例多胚种子现象比较稳定。此现象与前人研究的结论有明显不同 ,前人多认为单胚柑橘一般只产生单胚种子 ,即使有时也产生多胚种子 ,但其比例较低 ,一般不超过 7%。为此 ,笔者对清见×新3号柑的多胚种子进行了分胚培养 ,获得多胚苗 ,并取部分幼苗叶片进行RAPD分析。分析发现多数多胚苗具有父本的特征带或具有与母本明显不同的带型 ,肯定为有性后代 ;而且这些多胚苗大部分在遗传上非常一致 ,可能为同一受精卵分裂而来 ,但也发现所检测的部分多胚苗之间还存在差异谱带 ,可能为多卵受精发育而来 ,或在同一受精卵分离后出现了明显的变异。

分类号: S666

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