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龙须菜是一种重要的产琼胶海藻,对其繁殖发育的研究将有助于了解龙须菜的生长,有助于育种。本研究对龙须菜不同育性品系(981和鲁龙1号)在不同发育阶段的表达谱数据,采用加权基因共表达网络分析(WGCNA)方法构建基因共表达网络,共获得32个模块。其中,模块最大基因数量为2 577个,最小基因数为66个。经过筛选发现与品系相关的模块(以0.7为阈值)共5个,涉及基因共2 301个,对模块基因进行GO功能富集分析,结果表明主要富集以下功能上:信号转导、转运、细胞分化、翻译、细胞稳态、生物合成过程等。981品系与鲁龙1号品系的富集结果对比表明981品系在孢子放散过程中生物活性不高,生物合成水平较低,内环境稳态较差。经过KEGG富集,筛选到21个与981品系II期四分孢子形成相关的备选基因,主要富集到DNA复制和染色体形态变化等与细胞周期相关的功能上,表明981品系在孢子形成时期的细胞分裂可能出现异常。本文结果为进一步深入揭示龙须菜四分孢子体发育分子调控机制提供思路和导向。 相似文献
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Pyropia species grow in the intertidal zone and are cold-water adapted. To date, most of the information about the whole plastid and mitochondrial genomes(ptDNA and mtDNA) of this genus is limited to Northern Hemisphere species. Here, we report the sequencing of the ptDNA and mtDNA of the Antarctic red alga Pyropia endiviifolia using the Illumina platform. The plastid genome(195 784 bp, 33.28% GC content) contains 210 protein-coding genes, 37 tRNA genes and 6 rRNA genes. The mitochondrial genome(34 603 bp, 30.5% GC content) contains 26 protein-coding genes, 25 tRNA genes and 2 rRNA genes. Our results suggest that the organellar genomes of Py. endiviifolia have a compact organization. Although the collinearity of these genomes is conserved compared with other Pyropia species, the genome sizes show significant differences, mainly because of the different copy numbers of rDNA operons in the pt DNA and group II introns in the mtDNA. The other Pyropia species have 2–3 distinct intronic ORFs in their cox 1 genes, but Py. endiviifolia has no introns in its cox 1 gene. This has led to a smaller mtDNA than in other Pyropia species. The phylogenetic relationships within Pyropia were examined using concatenated gene sets from most of the available organellar genomes with both the maximum likelihood and Bayesian methods. The analysis revealed a sister taxa affiliation between the Antarctic species Py. endiviifolia and the North American species Py. kanakaensis. 相似文献
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