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A comparative study of the atp9 gene between a cytoplasmic male sterile line and its maintainer line and further development of a molecular marker specific for male sterile cytoplasm in kenaf (Hibiscus cannabinus L.)

文献类型： 外文期刊

作者： Zhao, Yanhong 2 ; Chen, Peng 1 ; Liao, Xiaofang 1 ; Zhou, Bujin 1 ; Liao, Jian 1 ; Huang, Zhipeng 1 ; Kong, Xiangjun 1 ;

作者机构： 1.Guangxi Univ, Coll Agr, Nanning 530005, Guangxi, Peoples R China

2.Guangxi Acad Agr Sci, Cash Crop Inst, Nanning 530007, Peoples R China

关键词： Kenaf (Hibiscus cannabinus L.);Cytoplasmic male sterility (CMS);atp9;Molecular marker;Quantitative PCR;Respiratory rate

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

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收录情况： SCI

摘要： mtDNA was isolated from cytoplasmic male sterility (CMS) line P3A and its maintainer P3B of kenaf (Hibiscus cannabinus L.). The atp9 gene and its two flanking sequences were obtained using homology cloning and high-efficiency thermal asymmetric interlaced PCR methods. The coding sequences showed only two base pairs difference between the CMS and its maintainer, and shared a homology of over 87 % with atp9 genes from other species in GenBank. However, when comparing the flanking sequences, a 47-bp deletion was characterized at the 3' flanking sequence of atp9 in the CMS line. Quantitative PCR analysis indicated that the expression level of atp9 in the CMS line was 0.937-fold that of its maintainer. Furthermore, the respiratory rate of anthers in the CMS line was markedly lower than that of its maintainer. The results indicated that the 47-bp deletion at the 3' flanking sequence of atp9 and/or down-regulated expression of the atp9 gene in the CMS line might be closely related to CMS in kenaf. To confirm whether the 47-bp deletion was specific to cytoplasm of male sterile lines, another 21 varieties were used for further analysis. The results showed that the 47-bp deletion was specific to male sterile cytoplasm (MSC) of kenaf. Based on these, a specific molecular marker was developed to distinguish the MSC from male fertile cytoplasm of kenaf.

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