Lin Zhang, Yan Shi, Wenfang Gong, Guang Zhao, Shixin Xiao, Hai Lin, Yanmin Li, Zhenyang Liao, Shengcheng Zhang, Guanxing Hu, Ziqi Ye, Haifeng Wang, Zhiqiang Xia, Yekun Yang, Heping Cao, Shengjun Zhong, Xingtan Zhang, Deyi Yuan
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引用次数: 0
摘要
油茶是一种具有重要经济价值的木本油料植物。复杂的倍性和基因组信息的缺乏严重阻碍了油茶的分子育种。在此，我们展示了一个 11.43-Gb 单倍型分辨的四倍体油茶（COL-tetra）染色体级基因组组装。本研究采用的方法支持 COL-tetra 是自交四倍体的结论，它可能源自二倍体 C. brevistyla 的基因组加倍。此外，DNA 甲基化在不平衡等位基因表达和种子发育中起着重要作用。遗传分异分析揭示了春花油茶和秋花油茶在开花时间上的显著分化信号，这可能是开花时间不同的物种之间生殖隔离的原因。在 COL-tetra 和 C. sasanqua 之间以及 C. vietnamensis 和 COL-hexa 之间发现了强烈的引种信号，这可能会影响农艺性状和环境适应性的发展。这项研究为油茶植物的进化、农艺性状发展和遗传结构提供了宝贵的见解。
The tetraploid Camellia oleifera genome provides insights into evolution, agronomic traits, and genetic architecture of oil Camellia plants.
Camellia oleifera is an economically important woody oil plant. Complex ploidy and lack of genomic information have seriously hindered the molecular breeding of C. oleifera. Here, we present an 11.43-Gb haplotype-resolved, chromosome-level genome assembly of tetraploid C. oleifera (COL-tetra). Methods employed in this study support the conclusion that COL-tetra is an autotetraploid and probably originates from genome doubling of the diploid C. brevistyla. In addition, DNA methylation plays a significant role in imbalanced allelic expression and seed development. Genetic divergence analyses reveal significant differentiation signals for flowering time between spring-flowering and autumn-flowering oil Camellia species, which probably account for reproductive isolation between species with distinct flowering times. Strong introgression signals are detected between COL-tetra and C. sasanqua and between C. vietnamensis and COL-hexa, which might affect the development of agronomic traits and environmental adaptability. This study provides valuable insights into the evolution, agronomic trait development, and genetic architecture of oil Camellia plants.
期刊介绍：
Cell Reports publishes high-quality research across the life sciences and focuses on new biological insight as its primary criterion for publication. The journal offers three primary article types: Reports, which are shorter single-point articles, research articles, which are longer and provide deeper mechanistic insights, and resources, which highlight significant technical advances or major informational datasets that contribute to biological advances. Reviews covering recent literature in emerging and active fields are also accepted.
The Cell Reports Portfolio includes gold open-access journals that cover life, medical, and physical sciences, and its mission is to make cutting-edge research and methodologies available to a wide readership.
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