title: [Construction and preliminary analysis of subtractive library for peel pitting of 'Fengjie' navel orange fruit].
abstract: In this study, the pitted peel and non-pitted peel of 'Fengjie' navel orange fruits were used as experimental materials to construct and screen the peel pitting related genes by suppression subtractive hybridization (SSH). The results showed that suppression subtractive hybridization was very effective. A cDNA library of differentially expressed genes was constructed. The library included about 200 clones with an average insert size of around 300 bp. Part of the positive clones were picked up randomly and sequenced. Six of the 50 clones had no homologous sequences being found and three had unknown functions in GenBank. According to the analysis of the homology, four homologous (Ca2+ binding protein, cysteine proteinase, NAC-domain protein and expansin) genes were chosen to examine their expressions through semi-quantitative RT-PCR analysis in pitted and non-pitted navel orange fruits. The expression of four genes were all higher in pitted peel than that in non-pitted peel. It suggests that these genes in the SSH cDNA library may be involved with peel pitting and can be subject of future investigation to explore the molecular biological mechanism of the pitting of citrus fruit.
authors.affiliation: Key Lab of Functional Gene and Regulation Technologies under Chongqing Municipal Education Commission, Genetic Engineering Research Center, College of Bio-Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Gao
authors.forename: Zheng-Guo
authors.initials: ZG
authors.lastname: Li
authors.forename: Jin
authors.initials: J
authors.lastname: Fan
authors.forename: Ying-Wu
authors.initials: YW
authors.lastname: Yang
mesh_terms: D001483:Base Sequence; D002957:Citrus / Q000235:genetics*; D032084:Citrus sinensis / Q000235:genetics*; D018744:DNA, Plant / Q000032:analysis; D020869:Gene Expression Profiling; D015723:Gene Library; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization / Q000379:methods*; D013382:Subtraction Technique
chemical_list: D018744:DNA, Plant