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| Content Provider | Springer Nature Link |
|---|---|
| Author | Song, Hui Nan, Zhibiao |
| Copyright Year | 2014 |
| Abstract | The class of nucleotide-binding site (NBS)-Leucine-rich repeat (LRR) disease resistance genes play an important role in defending plants from a variety of pathogens and insect pests. Consequently, many NBS-LRR genes have been identified in various plant species. In this study, we identified 617 NBS-encoding genes in the Medicago truncatula genome (Mt3.5v5) and divided them into two groups, regular (490) and non-regular (127) NBS-LRR genes. The regular NBS-LRR genes were characterized on the bases of structural diversity, chromosomal location, gene duplication, conserved protein motifs, and EST expression profiling. According to N-terminal motifs and LRR motifs, the 490 regular NBS-LRR genes were then classified into 10 types: CC-NBS (4), CC-NBS-LRR (212), TIR-NBS (20), TIR-NBS-LRR (160), TIR-NBS-TIR (1), TIR-NBS-TIR-LRR (2), NBS-TIR (7), NBS-TIR-LRR (1), NBS (10), and NBS-LRR (73). Analysis of the physical location and duplications of the regular NBS-LRR genes revealed that the M. truncatula genome is similar to rice. Interestingly, we found that TIR-type genes are more frequently expressed than non-TIR-type genes in M. truncatula, whereas the number of non-TIR-type regular NBS-LRR genes was greater than TIR-type genes, suggesting the gene expression was not associated with the total number of NBS-LRR genes. Moreover, we found that the phylogenetic tree supported our division of the regular NBS-LRR genes into two distinct clades (TIR-type and non-TIR-type), but some of the non-TIR-type lineages contain TIR-type genes. These analyses provide a robust database of NBS-LRR genes in M. truncatula that will facilitate the isolation of new resistance genes and breeding strategies to engineer disease resistance in leguminous crop. |
| Starting Page | 1129 |
| Ending Page | 1138 |
| Page Count | 10 |
| File Format | |
| ISSN | 10016538 |
| Journal | Chinese Science Bulletin |
| Volume Number | 59 |
| Issue Number | 11 |
| e-ISSN | 18619541 |
| Language | English |
| Publisher | Science China Press |
| Publisher Date | 2014-02-23 |
| Publisher Place | Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Medicago truncatula Disease resistance genes Nucleotide-binding sites Phylogenetic tree Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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