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Fine mapping of Pa-6 gene for purple apiculus in rice
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  • 作者:Xu Liu (1)
    Xu Sun (1)
    Wenying Wang (1)
    Hanfeng Ding (1)
    Wei Liu (1)
    Guangxian Li (2)
    Mingsong Jiang (2)
    Changxiang Zhu (3)
    Fangyin Yao (1)
  • 关键词:Pa ; 6 ; Physical mapping ; Purple apiculus ; Rice ; Single ; segment substitution line (SSSL)
  • 刊名:Journal of Plant Biology
  • 出版年:2012
  • 出版时间:June 2012
  • 年:2012
  • 卷:55
  • 期:3
  • 页码:218-225
  • 全文大小:499KB
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  • 作者单位:Xu Liu (1)
    Xu Sun (1)
    Wenying Wang (1)
    Hanfeng Ding (1)
    Wei Liu (1)
    Guangxian Li (2)
    Mingsong Jiang (2)
    Changxiang Zhu (3)
    Fangyin Yao (1)

    1. High-Tech Research Center, Shandong Academy of Agricultural Science, Jinan, 250100, P.R. China
    2. Shandong Rice Research Institute, Jinan, 250100, P.R.China
    3. State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai鈥檃n, Shandong, 271018, P.R. China
文摘
Purple apiculus is one of the important agronomic traits of rice. Single-segment substitution line (SSSL) W23-07-6-02-14 in the genetic background of an elite rice variety Huajingxian74 (HJX74) with the substituted interval of RM225-RM217-RM253 on the chromosome 6 was found to have purple apiculus (Pa). To map the gene governing Pa, W23-07-6-02-14 was crossed with the recipient HJX74 to develop an F2 secondary segregation population. The ratio of purple apiculus to green apiculus showed a good fit to 3:1 ratio, indicating that Pa was controlled by a major dominant gene. The gene locus for Pa was tentatively designated as Pa-6. Using 430 individuals from the F2 segregation population, the Pa-6 locus was mapped between two SSR markers RM19556 and RM19561 with genetic distances of 0.2 and 0.3 cM, respectively. For fine mapping of the Pa-6 gene, a large F2:3 segregation population of 3890 individuals was developed from F2 heterzygous plants in the RM19556-RM19561 region. Recombinant analyses further mapped the Pa-6 gene locus to an interval of 41.7-kb bounded L02 and RM19561. Sequence analysis of this 41.7-kb region revealed that it contains eleven open reading frames (ORFs), of which, ORF5 is classified as the one that is associated with the C (chromogen for anthocyanin) gene, it was presumed to be the candidate gene for Pa. This result provided a foundation of map-based cloning and function analysis of the Pa-6 gene.

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