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Identification and characterization of genes on a single subgenome in the hexaploid wheat (Triticum aestivum L.) genotype 'Chinese Spring'

文献类型： 外文期刊

作者： Ma, Jian 1 ; Zheng, Zhi 2 ; Stiller, Jiri 3 ; Lan, Xiu-jin 1 ; Liu, Yaxi 1 ; Deng, Mei 1 ; Wang, Penghao 4 ; Pu, Zhien 1 ; C 1 ;

作者机构： 1.Sichuan Agr Univ, Triticeae Res Inst, Chengdu 611130, Peoples R China

2.CSIRO Agr, 306 Carmody Rd, St Lucia, Qld 4067, Australia

3.Hebei Acad Agr & Forestry Sci, Inst Millet Crops, Natl Foxtail Millet Improvement Ctr, Shijiazhuang, Peoples R China

4.Murdoch Univ, Sch Vet & Life Sci, 90 South St, Murdoch, WA 6150, Australia

5.Sichuan Agr Univ, Coll Agron, Chengdu 611130, Peoples R China

6.Sichuan Agr Univ, Inst Ecol & Environm Sci, Chengdu 611130, Peoples R China

关键词： gene loss;evolution;wheat genome;Chinese Spring

期刊名称：GENOME （ 影响因子：2.166； 五年影响因子：2.474 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Gene loss during the formation of hexaploid bread wheat has been repeatedly reported. However, our knowledge on genome-wide analysis of the genes present on a single subgenome (SSG) in bread wheat is still limited. In this study, by analysing the 'Chinese Spring' chromosome arm shotgun sequences together with high-confidence gene models, we detected 433 genes on a SSG. Greater gene loss was observed in A and D subgenomes compared with B subgenome. More than 79% of the orthologs for these SSG genes were detected in diploid and tetraploid relatives of hexaploid wheat. Unexpectedly, no bias in expression breadth or in the distribution patterns of GO (gene ontology) terms for these genes was detected among the high-confidence genes. Further, network and KEGG (Kyoto Encyclopedia of Genes and Genomes) pathway analyses indicated that most of these genes were not functionally related to each other. Interestingly, 30.7% of these SSG genes were most highly expressed in root, showing biased distribution given the distribution of the whole high-confidence genes. Collectively, these results facilitate our understanding of the loss of the genes that were retained in a SSG during the formation of hexaploid wheat.

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