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EnglishDisease resistance (R) genes from different Rosaceae species have been identified by map-based cloning for resistance breeding, and most disease resistance genes encode NBS-LRR protein. However, reports describing evolutionary pattern of R-genes in Rosacese species are rare because several Rosaceae genome sequences have only become available in last several years. We performed a systematic genome-wide survey of NBS-LRR genes among five Rosaceae plants, including Fragaria vesca (woodland strawberry), Malus × domestica (apple), Pyrus bretschneideri (Asian pear), Prunus persica (peach) and Prunus mume (mei, or Japanese apricot) with 144, 748, 469, 354 and 352 NBS-LRR genes. The high proportions of multi-genes and similar Ks peaks (Ks = 0.1- 0.2) of gene families in the four woody genomes indicate that recent duplications played an important role in the four woody perennial Rosaceae species. Subsequently, 385 species-specific duplicate clades were dominant in the phylogenetic tree constructed by all 2067 NBS-LRR genes. High percentages of NBS-LRR genes involved in species-specific duplication were found among the five genomes (54.86% in woodland strawberry, 68.05% in apple, 57.56% in pear, 44.07% in peach and 45.74% in mei). It might be inferred that species-specific duplication mainly contributes to the expansion of NBS-LRR genes in the five Rosacese species. In addition, the Ks and Ka/Ks values of TIR-NBS-LRR (TNL) were significantly greater than those of non-TIR-NBS-LRR (non-TNL), suggesting that rapidly evolved TNLs have different evolutionary patterns to adapt to different pathogens compared with non-TNL genes. In addition, some of the RPW8 domain-containing NBS-LRRs had Ka/Ks ratios less than 1, suggesting that they were driven by positive selection
Zhong, Y.; Yin, H.; Sargent, D.; Malnoy, M.; Cheng, Z.M. (2014). Unique evolutionary pattern of NBS-LRR genes among five Rosaceae species. In: RGC7: 7th International Rosaceae Genomics Conference, June 24-26, 2014, Seattle, Washington, USA: 76. url: http://www.rosaceae.org/sites/default/files/files/AbstractBook_text-June2014-Final.pdf handle: http://hdl.handle.net/10449/23815
| Citation: | Zhong, Y.; Yin, H.; Sargent, D.; Malnoy, M.; Cheng, Z.M. (2014). Unique evolutionary pattern of NBS-LRR genes among five Rosaceae species. In: RGC7: 7th International Rosaceae Genomics Conference, June 24-26, 2014, Seattle, Washington, USA: 76. url: http://www.rosaceae.org/sites/default/files/files/AbstractBook_text-June2014-Final.pdf handle: http://hdl.handle.net/10449/23815 |
| Internal authors: | |
| Organization unit: | Genomics and Biology of Fruit Crops Department # CRI_2011-JAN2016 |
| Authors: | Zhong, Y.; Yin, H.; Sargent, D.; Malnoy, M.; Cheng, Z.M. |
| Title: | Unique evolutionary pattern of NBS-LRR genes among five Rosaceae species |
| Issue Date: | 2014 |
| Scientific Disciplinary Area: | Settore AGR/07 - Genetica Agraria |
| Keywords ENG: | NBS-LRR genes Rosaceae species Disease resistance genes Species-specific duplication |
| Language: | English |
| Nature of content: | Abstract in Atti di convegno/Conference abstract |
| URL: | http://www.rosaceae.org/sites/default/files/files/AbstractBook_text-June2014-Final.pdf |
| Appears in Collections: | 03 - Conference object |
Files in This Item:
| File | Description | Type | License | |
|---|---|---|---|---|
| 2014 RGC7 76.pdf | N/A | Tutti i diritti riservati (All rights reserved) | Open AccessView/Open |
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