甘蓝型油菜和白菜型油菜种间杂种的小孢子培养

被引:15
作者
周永明
ScarthR
机构
[1] 华中农业大学作物遗传改良国家重点实验室!武汉,加拿大Manitoba大学植物科学系
关键词
甘蓝型油菜; 白菜型油菜; 种间杂种; 小孢子培养; 非整倍体;
D O I
暂无
中图分类号
Q943.1 [植物细胞的离体培养];
学科分类号
摘要
利用分离小孢子培养从甘蓝型油菜(Brassica napus)和白菜型油菜(B. cam pestris)种间杂种中获得了胚和再生植株。所用的培养程序是,将甘蓝型油菜和白菜型油菜杂种小孢子在蔗糖浓度为17% 、BA 为0.1 m g/L的液体NLN 培养基中32 ℃下暗培养48 h,再转入蔗糖浓度为10% 的NLN 培养液中25 ℃下暗培养3 周。不同杂种间小孢子胚胎发生能力存在差异,其中UM921(白菜型油菜)×911186(甘蓝型油菜)正反交杂种的胚产量显著高于供试的其它组合。供体植株种植在10 ℃/5 ℃(昼/夜)条件下能显著改善杂种小孢子胚产量和质量。杂种小孢子胚产量和杂种植株每荚种子数存在极显著正相关,但杂种植株的花粉育性和胚产量间相关不显著。大多数甘蓝型油菜和白菜型油菜杂种小孢子胚衍生植株为非整倍体,22.8% 的植株起源于具亲本染色体数的小孢子,几乎全部为n= 19 的类型。讨论了影响种间杂种小孢子胚胎发生的因素以及种间杂种小孢子培养技术的可能用途
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页码:848 / 855
页数:8
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