外源种质导入引发小麦表观遗传变异的MSAP分析

被引:18
作者
张勇 [1 ]
刘朝辉 [1 ]
刘成 [1 ]
杨足君 [1 ]
邓科君 [1 ]
彭金华 [1 ]
周建平 [1 ]
李光蓉 [1 ]
唐宗祥 [2 ]
任正隆 [1 ]
机构
[1] 电子科技大学生命科学与技术学院
[2] 四川农业大学农学院植物遗传育种省级重点实验室
关键词
小麦; 黑麦; 易位系; 表观遗传; DNA甲基化; MSAP;
D O I
暂无
中图分类号
S512.1 [小麦]; Q943 [植物细胞遗传学];
学科分类号
071007 [遗传学]; 090302 [植物营养学];
摘要
通过染色体工程将外源种质向小麦基因组转移的过程中,可以诱发受体物种基因组结构及基因表达的广泛遗传变异.本文以3个高代分离的小麦-黑麦姊妹易位系及其农艺亲本为材料,应用GISH和AFLP技术分析其基因组结构与组成,发现姊妹系材料基因组组成高度一致;同其亲本相比较,除1RS/1BL染色体易位外,并没有表现出其他明显的基因组结构变异.进一步的MSAP分析发现,易位系材料发生全甲基化修饰的比例比小麦亲本(全甲基化,16.37%;半甲基化,25.44%)明显上升(CN12,20.15%;CN17,20.91%;CN18,22.42%),而半甲基化比例则明显下降(CN12,21.41%;CN17,23.43%;CN18,22.42%).本研究共检测到29种不同类型的甲基化修饰模式,其中13种类型(33.74%)的位点表现为超甲基化修饰,9种类型(22.76%)的位点表现为去甲基化修饰,而余下7种类型(4.07%)的位点甲基化模式变异未能明确界定.从中分离了多条存在甲基化位点变异的DNA序列,鉴定了多种小麦转座子序列、亚端粒重复序列以及单拷贝蛋白质编码序列.
引用
收藏
页码:2857 / 2865
页数:9
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