Insight into the evolution of the Solanaceae from the parental genomes of Petunia hybrida
Insight into the evolution of the Solanaceae from the parental genomes of Petunia hybrida
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从矮牵牛亲本基因组洞察茄科的进化
DOI：
10.1038/nplants.2016.74
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发表时间：
2016-06-01
期刊：
影响因子：
18
通讯作者：
Kuhlemeier, Cris
中科院分区：
文献类型：
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作者：
Bombarely, Aureliano;Moser, Michel;Kuhlemeier, Cris
矮牵牛是一种受欢迎的床上用品植物，作为遗传模型系统有很长的历史。我们报告了其两个野生亲本，P. axillaris N和P. inflata S6的全基因组测序和近交衍生物的组装。组装包括91.3%和90.2%的覆盖率，其二倍体基因组（1.4 Gb; 2n = 14）含有32，928和36，697蛋白质编码基因，分别。基因组显示，矮牵牛谱系经历了至少两轮六倍化：与大多数真双子叶植物共享的较老的伽马事件，以及与番茄和其他茄科物种共享的更近的茄科事件。参与从蜜蜂到蛾授粉转变的转录因子位于基因组的特别动态区域，这可能是花的颜色模式和授粉系统显着多样性的关键。高质量的基因组序列将提高矮牵牛作为研究独特生物现象（如小RNA、共生、自交不亲和和昼夜节律）的模型系统的价值。
Petunia hybrida is a popular bedding plant that has a long history as a genetic model system. We report the whole-genome sequencing and assembly of inbred derivatives of its two wild parents, P. axillaris N and P. inflata S6. The assemblies include 91.3% and 90.2% coverage of their diploid genomes (1.4 Gb; 2n = 14) containing 32,928 and 36,697 protein-coding genes, respectively. The genomes reveal that the Petunia lineage has experienced at least two rounds of hexaploidization: the older gamma event, which is shared with most Eudicots, and a more recent Solanaceae event that is shared with tomato and other solanaceous species. Transcription factors involved in the shift from bee to moth pollination reside in particularly dynamic regions of the genome, which may have been key to the remarkable diversity of floral colour patterns and pollination systems. The high-quality genome sequences will enhance the value of Petunia as a model system for research on unique biological phenomena such as small RNAs, symbiosis, self-incompatibility and circadian rhythms.