کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2787702 1154342 2009 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of collinear regions of Oryza AA and CC genomes
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی تکاملی
پیش نمایش صفحه اول مقاله
Analysis of collinear regions of Oryza AA and CC genomes
چکیده انگلیسی

Comparative analyses of genome structure and sequence of closely related species have yielded insights into the evolution and function of plant genomes. A total of 103,844 BAC end sequences delegated ∼73.8 Mb of O. officinalis that belongs to the CC genome type of the rice genus Oryza were obtained and compared with the genome sequences of rice cultivar, O. sativa ssp. japonica cv. Nipponbare. We found that more than 45% of O. officinalis genome consists of repeat sequences, which is higher than that of Nipponbare cultivar. To further investigate the evolutionary divergence of AA and CC genomes, two BAC-contigs of O. officinalis were compared with the collinear genomic regions of Nipponbare. Of 57 genes predicted in the AA genome orthologous regions, 39 had orthologs in the regions of the CC genome. Alignment of the orthologous regions indicated that the CC genome has undergone expansion in both genic and intergenic regions through primarily retroelement insertion. Particularly, the density of RNA transposable elements was 17.95% and 1.78% in O. officinalis and O. sativa, respectively. This explains why the orthologous region is about 100 kb longer in the CC genome in comparison to the AA genome.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Genetics and Genomics - Volume 36, Issue 11, November 2009, Pages 667–677
نویسندگان
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