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辣椒杂交种与亲本苗期叶片基因差异表达分析

文献类型: 中文期刊

作者: 徐小万 1 ; 李颖 1 ; 王恒明 1 ; 李涛 1 ; 何水林 2 ; 官德义 2 ;

作者机构: 1.广东省农科院蔬菜研究所

2.福建农林大学作物科学学院

关键词: 辣椒;杂种优势;转录组;RNA-seq

期刊名称: 广东农业科学

ISSN: 1004-874X

年卷期: 2016 年 43 卷 11 期

页码: 36-42

摘要: 目前辣椒杂种优势的利用已取得很大成效,但是辣椒杂种优势的分子机理仍然不明。辣椒杂种优势的分子机理是一个重要的生物学和农学课题。为比较分析苗期辣椒杂交种(D6×D7,D7×D6)及其亲本(D6、D7)的成熟功能叶转录谱,把4个功能叶c DNA文库在Illumina Hi Seq 2000平台进行RNASeq分析。通过转录组测序,共得到0.6亿条原始的reads,经过筛选获得0.44亿条高质量reads(100 bp)。基因存在与缺失变异统计结果表明,单亲表达一致型有1068个(6.20%)和780个(4.56%)基因分别在正交(D6×D7)和反交(D7×D6)中被检测到,在4种基因存在与缺失变异类型中所占比例比较高。对双亲表达量不同的基因作进一步表达模式分析,结果表明,杂种(正、反交)与双亲相比,大部分基因呈均非加性表达,加性表达基因比例不足8%,在非加性表达基因中,超显性表达的基因占大多数,正、反交分别为66.08%和62.96%,这与偏单亲的显性模型分析结论相一致。

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