大麦染色体特异IT分子标记的筛选
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国家重点研发计划(2016YFD0102001);


Screening IT (Intron Targeting) Molecular Markers Specific for Individual Chromosomes of Barley
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    摘要:

    为了筛选高密度且均匀分布于大麦各染色体的分子标记,该研究利用前期开发的2 267个IT(intron targeting)标记,在‘中国春’、栽培大麦(Golden promise)和普通小麦(中国春)栽培大麦(Betzes)的 6个二体异附加系中进行扩增。结果发现:有534个标记可作为大麦染色体特异的IT分子标记,分别分布在大麦的1H(96个)、2H(84个)、3H(60个)、4H(105个)、5H(59个)、6H(80个)和7H(50个)染色体。进一步利用小麦族多基因组学网站和大麦参考基因组序列进行比对,结果发现,除了标记CINAU800、CINAU1734、CINAU1796、CINAU1736 和CINAU1691之外,其余的标记对应的原始基因序列都能比对到大麦对应的同源群的参考基因组中。研究表明,该研究筛选到了534个大麦染色体特异的IT分子标记,多态率为23.56%,略高于其他大麦分子标记;且这些大麦各染色体特异的IT分子标记可用于追踪大麦的特定染色体。

    Abstract:

    To screen high density and evenly distributed molecular markers on individual barley chromosomes, we used a total of 2 267 primer pairs previously developed and amplified in CS, barley (Golden promise) and wheatbarley disomic addition lines (2H, 3H, 4H, 5H, 6H and 7H). We assigned 534 IT markers to seven barley chromosomes (1H7H) using 6 wheatbarley disomic addition lines: 96 to 1H, 84 to 2H, 60 to 3H, 105 to 4H, 59 to 5H, 80 to 6H, and 50 to 7H, respectively. Further using the Triticeae multiomics center and the barley reference sequence, except for molecular markers CINAU800, CINAU1734, CINAU1796, CINAU1736 and CINAU1691, it was found that gene sequences corresponding to all of other molecular markers could align to the barley reference sequence. This result indicated that 534 specific markers for individual chromosomes of barley were screened and the polymorphic rate (23.56%) was slightly higher than that of other molecular markers. This result further confirmed that these specific markers for individual chromosomes of barley could be used to trace the individual chromosome of barley.

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李红斌,刘志鹏,徐 涛,等.大麦染色体特异IT分子标记的筛选[J].西北植物学报,2021,41(6):962-970

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  • 在线发布日期: 2021-07-20
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