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李运涛

作品数:1 被引量:9H指数:1
供职机构:西南农业大学农学与生命科学学院重庆市油菜工程技术研究中心更多>>
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白菜型油菜DFR基因的克隆与序列分析(英文)被引量:9
2005年
By using RACE (rapid amplification of cDNA ends) based homologous cloning strategy, we have successfully isolated the genomic and full-length cDNA sequences of a gene encoding typical DFR (dihydroflavonol-4-reductase) from black-seeded Brassica campestris L. var. oleifera DC.. The gene, designated BcDFR here, is 1 722bp in length and harbors 5 introns with typical splice sites of plant DFR genes. BcDFR cDNA is 1 311bp in length with a 1 158bp ORF as well as a 25bp 5’ UTR and a 128bp 3’ UTR. The encoded BcDFR protein is 385 aa with a calculated Mw of 42.85kD and a pI value of 5.55. The nucleotide and amino acid sequences of this gene share extensive homologies to plant DFR genes of wide origins especially high similarities to Cruciferous DFR genes. Sequence analyses such as phylogenetic analysis, conserved domain search and substrate specificity region detection all indicated that BcDFR gene is a quite potentially biofunctional gene. Its cloning enables us to further dissect the possible relatedness between DFR gene and Brassica seed coat color traits and to create transgenic novel yellow-seeded rapeseed germplasm through antisense- or RNAi-suppression of DFR gene expression in black-seeded elite cultivars.
李运涛李加纳柴友荣杨成军雷波
关键词:白菜型油菜克隆
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