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论文 |
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| 论文题目: |
Genome of Plant Maca (Lepidium meyenii) Illuminates Genomic Basis for High Altitude Adaptation in the Central Andes |
| 作者: |
Zhang J, Tian Y, Yan L, Zhang G, Wang X, Zeng Y, Zhang J, Ma X, Tan Y, Long N, Wang Y, Ma Y, He Y, Xue Y, Hao S, Yang S, Wang W, Zhang L, Dong Y, Chen W, Sheng J |
| 联系作者: |
shengj@ynau.edu.cn |
| 发表年度: |
2016 |
| DOI: |
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| 摘要: |
Maca (Lepidium meyenii Walp, 2n = 8x = 64) of Brassicaceae family is an Andean economic plant cultivated on the 4000-4500 meters central sierra in Peru. Considering the rapid uplift of central Andes occurred 5 to 10 million years ago (Mya), an evolutionary question arises on how plants like maca acquire high altitude adaptation within short geological period. Here, we report the high-quality genome assembly of maca, in which two close-spaced maca-specific whole genome duplications (WGDs, ∼ 6.7 Mya) were identified. Comparative genomics between maca and close-related Brassicaceae species revealed expansions of maca genes and gene families involved in abiotic stress response, hormone signaling pathway and secondary metabolite biosynthesis via WGDs. Retention and subsequent evolution of many duplicated genes may account for the morphological and physiological changes (i.e. small leaf shape and self-fertility) in maca for high altitude environment. Additionally, some duplicated maca genes under positive selection were identified with functions in morphological adaptation (i.e. LEAF CURLING RESPONSIVENESS) and abiotic stress response (i.e. GLYCINE-RICH RNA-BINDING PROTEINS and DNA-DAMAGE-REPAIR/TOLERATION 2). Collectively, the maca genome provides useful information on the important roles of WGDs in plant high altitude adaptation in the Andes. |
| 刊物名称: |
Molecular Plant |
| 论文出处: |
http://www.sciencedirect.com/science/article/pii/S1674205216300533 |
| 影响因子: |
7.142 (2015年) |
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