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Molecular diversity and differential expression of starch-synthesis genes in developing kernels of three maize inbreds

文献类型： 外文期刊

作者： Ding, Xiang-Zhen 1 ; Wang, Bei-Guo 1 ; Gao, Qing-Hua 3 ; Zhang, Qiong 1 ; Yan, Gui-Qin 2 ; Duan, Ke 1 ; Huang, Jian-Hu 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Shanghai Key Lab Agr Genet & Breeding, Inst Biol Tech, Shanghai 201106, Peoples R China

2.Shanxi Normal Univ, Coll Life Sci, Linfen 041104, Peoples R China

3.Shanghai Acad Agr Sci, Shanghai Key Lab Protected Hort Technol, Forest & Fruit Res Inst, Shanghai 201106, Peoples R China

关键词： Zea mays;Starch-synthesis gene;Expression pattern;Nucleic polymorphism;Mis-splicing event;Mutation

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2009 年 28 卷 10 期

页码：

收录情况： SCI

摘要： The maize genome remains abundant in molecular diversity, and the rich genetic diversity of maize starch-synthesis genes is crucial for controlling various grain traits. To explore the unique mechanism controlling the advantageous waxy trait and characterize the molecular feature of genes relevant to starch composition in two elite waxy inbreds, expression profiling combined with gene organization analysis was performed in them as compared to one normal inbred. Genotype-specific expression patterns were observed for most genes studied. The waxy inbreds were shown to contain mutations in multiple starch-synthesis genes, namely gbssI (wx), gbssIIb and isa2 (potentially isa3 too).The mis-splicing events directly accounted for wx loss of function. Contrarily, disruption of 5' and 3' transcript sequence may contribute to the absence of GbssIIb and Isa2 transcripts in waxy inbreds, respectively. Besides, the splicing of Sugary1 transcript was developmentally regulated in the normal inbred, and DNA polymorphisms were detected within SSIIIb-1 gene in waxy inbreds.

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