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Genomic basis of high-altitude adaptation in Tibetan Prunus fruit trees

文献类型： 外文期刊

作者： Wang, Xia 1 ; Liu, Shengjun 1 ; Zuo, Hao 1 ; Zheng, Weikang 1 ; Zhang, Shanshan 2 ; Huang, Yue 1 ; Pingcuo, Gesang 2 ; Yi 1 ;

作者机构： 1.Huazhong Agr Univ, Key Lab Hort Plant Biol, Minist Educ, Wuhan 430070, Peoples R China

2.Minist Agr & Rural Affairs, Qinghai Tibet Plateau Fruit Trees Sci Observat Te, Lhasa 850032, Tibet, Peoples R China

3.Hubei Hongshan Lab, Wuhan 430070, Peoples R China

4.Tibet Acad Agr & Anim Husb Sci, Inst Vegetables, Lhasa 850002, Tibet, Peoples R China

5.Huazhong Agr Univ, Key Lab Hort Crop Fruit Trees Biol & Genet Improv, Minist Agr & Rural Affairs, Wuhan 430070, Peoples R China

6.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China

7.Swedish Univ Agr Sci, Dept Forestry Genet & Plant Physiol, S-90736 Umea, Sweden

期刊名称：CURRENT BIOLOGY （ 影响因子：10.834； 五年影响因子：11.713 ）

ISSN： 0960-9822

年卷期： 2021 年 31 卷 17 期

页码：

收录情况： SCI

摘要： The Great Himalayan Mountains and their foothills are believed to be the place of origin and development of many plant species. The genetic basis of adaptation to high plateaus is a fascinating topic that is poorly understood at the population level. We comprehensively collected and sequenced 377 accessions of Prunus germplasm along altitude gradients ranging from 2,067 to 4,492 m in the Himalayas. We de novo assembled three high-quality genomes of Tibetan Prunus species. A comparative analysis of Prunus genomes indicated a remarkable expansion of the SINE retrotransposons occurred in the genomes of Tibetan species. We observed genetic differentiation between Tibetan peaches from high and low altitudes and that genes associated with light stress signaling, especially UV stress signaling, were enriched in the differentiated regions. By profiling the metabolomes of Tibetan peach fruit, we determined 379 metabolites had significant genetic correlations with altitudes and that in particular phenylpropanoids were positively correlated with altitudes. We identified 62 Tibetan peach-specific SINEs that colocalized with metabolites differentially accumualted in Tibetan relative to cultivated peach. We demonstrated that two SINEs were inserted in a locus controlling the accumulation of 3-O-feruloyl quinic acid. SINE1 was specific to Tibetan peach. SINE2 was predominant in high altitudes and associated with the accumulation of 3-O-feruloyl quinic acid. These genomic and metabolic data for Prunus populations native to the Himalayan region indicate that the expansion of SINE retrotransposons helped Tibetan Prunus species adapt to the harsh environment of the Himalayan plateau by promoting the accumulation of beneficial metabolites.

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