蔗糖是植物糖类源库运输的主要形式,是植物生长中重要的能源物质。本研究利用196份已重测序的国内外品种构成的自然群体为试验材料,测定该群体苗期叶片蔗糖含量,结合混合线性模型(Mixed Linear Model)进行全基因组关联分析。结果显示:...蔗糖是植物糖类源库运输的主要形式,是植物生长中重要的能源物质。本研究利用196份已重测序的国内外品种构成的自然群体为试验材料,测定该群体苗期叶片蔗糖含量,结合混合线性模型(Mixed Linear Model)进行全基因组关联分析。结果显示:根据阈值筛选得到5个显著相关SNP位点,分别位于第15和20号染色体上,且在SNP位点上下游各100 kb搜索到27个相关基因。通过GO功能富集分析、KEGG代谢通路富集分析及基因功能注释,筛选得到5个可能与大豆叶片蔗糖含量相关的候选基因,并通过相对表达量分析鉴定得到Glyma.15G023800、Glyma.15G024000、Glyma.15G024600共3个与大豆叶片蔗糖含量相关基因。研究结果为探究大豆叶片蔗糖含量遗传机理提供理论参考。展开更多
Periodic photonic structures can provide rich modulation in propagation of light due to well-defined band structures.Especially near band edges,light localization and the effect of near-zero refractive index have attr...Periodic photonic structures can provide rich modulation in propagation of light due to well-defined band structures.Especially near band edges,light localization and the effect of near-zero refractive index have attracted wide attention.However,the practically fabricated structures can only have finite size,i.e.,limited numbers of periods,leading to changes of the light propagation modulation compared with infinite structures.Here,we study the size effect on light localization and near-zero refractive-index propagation near band edges in one-dimensional periodic structures.Near edges of the band gap,as the structure's size shrinks,the broadening of the band gap and the weakening of the light localization are discovered.When the size is small,an added layer on the surface will perform large modulation in the group velocity.Near the degenerate point with Dirac-like dispersion,the zero-refractive-index effects like the zero-phase difference and near-unity transmittance retain as the size changes,while absolute group velocity fluctuates when the size shrinks.展开更多
文摘蔗糖是植物糖类源库运输的主要形式,是植物生长中重要的能源物质。本研究利用196份已重测序的国内外品种构成的自然群体为试验材料,测定该群体苗期叶片蔗糖含量,结合混合线性模型(Mixed Linear Model)进行全基因组关联分析。结果显示:根据阈值筛选得到5个显著相关SNP位点,分别位于第15和20号染色体上,且在SNP位点上下游各100 kb搜索到27个相关基因。通过GO功能富集分析、KEGG代谢通路富集分析及基因功能注释,筛选得到5个可能与大豆叶片蔗糖含量相关的候选基因,并通过相对表达量分析鉴定得到Glyma.15G023800、Glyma.15G024000、Glyma.15G024600共3个与大豆叶片蔗糖含量相关基因。研究结果为探究大豆叶片蔗糖含量遗传机理提供理论参考。
基金the National Key Basic Research Program of China(Grant No.2022YFA1404800)the National Natural Science Foundation of China(Grant Nos.12234007 and 12221004)supported by Science and Technology Commission of Shanghai Municipality,China(Grant Nos.19XD1434600,2019SHZDZX01,19DZ2253000,20501110500,and 21DZ1101500)。
文摘Periodic photonic structures can provide rich modulation in propagation of light due to well-defined band structures.Especially near band edges,light localization and the effect of near-zero refractive index have attracted wide attention.However,the practically fabricated structures can only have finite size,i.e.,limited numbers of periods,leading to changes of the light propagation modulation compared with infinite structures.Here,we study the size effect on light localization and near-zero refractive-index propagation near band edges in one-dimensional periodic structures.Near edges of the band gap,as the structure's size shrinks,the broadening of the band gap and the weakening of the light localization are discovered.When the size is small,an added layer on the surface will perform large modulation in the group velocity.Near the degenerate point with Dirac-like dispersion,the zero-refractive-index effects like the zero-phase difference and near-unity transmittance retain as the size changes,while absolute group velocity fluctuates when the size shrinks.
