生物技术通报 ›› 2019, Vol. 35 ›› Issue (5): 42-47.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0089

• 高粱专题 • 上一篇    下一篇

高粱A1型细胞质雄性不育系与保持系线粒体基因组分析比较

王平1, 丛玲1, 王春语1, 朱振兴1, A Ashok Kumar2, 张丽霞1, 陆晓春1   

  1. 1.辽宁省农业科学院高粱研究所,沈阳 110161;
    2.国际热带半干旱地区作物研究所,帕坦奇鲁 印度502324
  • 收稿日期:2019-01-23 出版日期:2019-05-26 发布日期:2019-05-23
  • 作者简介:王平,男,博士研究生,研究方向:高粱分子育种技术研发,E-mail:pingw-556@163.com;丛玲同为本文第一作者
  • 基金资助:
    国家重点研发计划(2018YFD1000701,2018YFD1000700),国家自然科学基金项目(31500203,31501241),国家现代农业产业技术体系建设项目(CARS-06-13.5-A3)

Comparison of Mitochondrial Genome Between A1 Cytoplasmic Male Sterile Line and Maintainer Line of Sorghum bicolor

WANG Ping1, CONG Ling1, WANG Chun-yu1, ZHU Zhen-xing1, A Ashok KUMAR2, ZHANG Li-xia1, LU Xiao-chun1   

  1. 1.Sorghum Research Institute,Liaoning Academy of Agricultural Sciences,Shenyang 110161;
    2.International Crops Research Institute for the Semi-Arid Tropics,Patancheru India 502324
  • Received:2019-01-23 Published:2019-05-26 Online:2019-05-23

摘要: 线粒体基因组易位是导致作物细胞质雄性不育(Cytoplasmic male sterility,CMS)性状产生的重要遗传机制。比较高粱A1型细胞质雄性不育系与保持系线粒体基因组,寻找易位区为克隆高粱A1型细胞质雄性不育相关基因奠定基础。以高粱A1型细胞质雄性不育系Tx623A和其保持系Tx623B为试验材料,采用二代Illumina Hiseq结合三代PacBio测序技术,对2个样品的线粒体基因组进行组装,比较和分析不育系和保持系基因组结构和基因差异。高粱Tx623A和Tx623B线粒体基因组大小分别为449 727 bp和452 772 bp,预测编码开放阅读框(Open reading frame,ORFs)分别为147和145个,且两基因组特有基因分别为8个和6个。两线粒体基因组共线性比较分析,发现存在一个57 kb的基因组片段易位的结构变异(Structural variation,SV)区域,该易位区可能与A1型细胞质雄性不育有关。Tx623A和Tx623B线粒体基因组中易位区为高粱A1型细胞质雄性不育基因克隆提供了基因组信息。

关键词: 高粱, 不育系, 保持系, 线粒体基因组, 细胞质雄性不育

Abstract: Mitochondrial genomic translocation is an important genetic mechanism for cytoplasmic male sterility(CMS)in crops. The main purpose of this study is to explore the translocation region of mitochondrial genomes by comparing the mitochondrial genome between A1 cytoplasmic male sterile line and maintainer line of Sorghum bicolor,and to lay a foundation for cloning related genes of sorghum A1 cytoplasmic male sterility. A1 cytoplasmic male sterile line Tx623A and its maintainer line Tx623B of sorghum were used in this experiment. Their mitochondrial genome sequencing data from Illumina Hiseq(next generation sequencing)and PacBio seq(third generation sequencing)were assembled,and then,the differences of genome structures and genes between the two lines were compared and analyzed. The results showed that the mitochondrial genome sizes of Tx623A and Tx623B were 449 727 bp and 452 772 bp,respectively. The predicted open reading frames(ORFs)were 147 and 145,among which the number of the specific genes for Tx623A were 8 and 6 for Tx623B. Importantly,a 57 kb genome structural variation(SV)region was found after comparing the two mitochondrial genomes,and which may be related to A1 cytoplasmic male sterility. Collectively,our results provide genomic information for cloning related genes of sorghum A1 cytoplasmic male sterility.

Key words: Sorghum bicolor, sterile line, maintainer line, mitochondrial genome, cytoplasmic male sterility