The volatile oil of Lysimachia foenum-graecum Hance grown in Jinxiou County of Guangxi Zhuangzu Autonomous Region was extracted with the steam distillation, the constituents and contents of the volatile oil were analy...The volatile oil of Lysimachia foenum-graecum Hance grown in Jinxiou County of Guangxi Zhuangzu Autonomous Region was extracted with the steam distillation, the constituents and contents of the volatile oil were analyzed by means of GC-MS-DS technique. There are 130 components in the oil, in which 77 components have been identified. The major components were 9,12-octadecadienoic acid (10.265%), heptadecanoic acid (7.894%), phytol (5.277%), undecanal (3.566%), butyl phthalate (2.719%), etc.展开更多
采用基因分型测序(GBS)技术对堇叶紫金牛[Ardisia violacea(T.Suzuki)W.Z.Fang et K.Yao]13个野生居群77份样本进行单核苷酸多态性(SNP)位点挖掘,在此基础上,对13个居群77份样本的遗传多样性、系统发育树、亲缘关系等进行分析。结果表明...采用基因分型测序(GBS)技术对堇叶紫金牛[Ardisia violacea(T.Suzuki)W.Z.Fang et K.Yao]13个野生居群77份样本进行单核苷酸多态性(SNP)位点挖掘,在此基础上,对13个居群77份样本的遗传多样性、系统发育树、亲缘关系等进行分析。结果表明:共获得有效SNP位点246307个,每份样本检测到SNP位点1154~3789个。13个居群的观测杂合度为0.1569~0.4289,多态信息含量为0.0785~0.3244,核苷酸多样性指数为0.0002~0.0007,Tajima’s D值为0.2247~1.0936,Shannon’s多样性指数为0.2175~0.6649,表明堇叶紫金牛整体遗传多样性水平偏低。系统发育树、主成分分析和遗传结构分析结果显示77份样本可划分为6组。亲缘关系分析结果显示:居群内个体间的亲缘关系整体较近;居群间的亲缘关系与地理距离有一定的相关性。遗传分化和基因流分析结果显示:大部分居群间存在较高的遗传分化,各居群间存在一定程度的基因交流。综上所述,堇叶紫金牛13个居群的整体遗传多样性偏低,但居群间的遗传分化程度较高,这与居群间的地理距离较远、基因交流较少有关。建议优先保护安徽省黄山市祁门县牯牛降、浙江省舟山市定海区蔡家岙和浙江省宁波市象山县屠家园村3个遗传多样性较高的居群,并开展相关繁育工作以维持和扩大居群数量。展开更多
描述了云南省临沧市邦东大雪山发现的报春花科（Primulaceae）新属—假珍珠菜属（Paralysimachia F.Du,J.Wang et S.S.Yang）。该属与珍珠菜属（Lysimachia）相近,区别在于前者单花被,无花冠,花丝远长于花被,基生胎座而不是特立中央胎座...描述了云南省临沧市邦东大雪山发现的报春花科（Primulaceae）新属—假珍珠菜属（Paralysimachia F.Du,J.Wang et S.S.Yang）。该属与珍珠菜属（Lysimachia）相近,区别在于前者单花被,无花冠,花丝远长于花被,基生胎座而不是特立中央胎座,胚珠8枚以下而非多数。同时定名和描述了该属的模式种—假珍珠菜（Paralysimachia xueshanensis F.Du,J.Wang et S.Y.Yang）。该新属种分布于邦东大雪山山顶海拔3 390~3 420 m范围的亚高山草甸。展开更多
文摘The volatile oil of Lysimachia foenum-graecum Hance grown in Jinxiou County of Guangxi Zhuangzu Autonomous Region was extracted with the steam distillation, the constituents and contents of the volatile oil were analyzed by means of GC-MS-DS technique. There are 130 components in the oil, in which 77 components have been identified. The major components were 9,12-octadecadienoic acid (10.265%), heptadecanoic acid (7.894%), phytol (5.277%), undecanal (3.566%), butyl phthalate (2.719%), etc.
文摘采用基因分型测序(GBS)技术对堇叶紫金牛[Ardisia violacea(T.Suzuki)W.Z.Fang et K.Yao]13个野生居群77份样本进行单核苷酸多态性(SNP)位点挖掘,在此基础上,对13个居群77份样本的遗传多样性、系统发育树、亲缘关系等进行分析。结果表明:共获得有效SNP位点246307个,每份样本检测到SNP位点1154~3789个。13个居群的观测杂合度为0.1569~0.4289,多态信息含量为0.0785~0.3244,核苷酸多样性指数为0.0002~0.0007,Tajima’s D值为0.2247~1.0936,Shannon’s多样性指数为0.2175~0.6649,表明堇叶紫金牛整体遗传多样性水平偏低。系统发育树、主成分分析和遗传结构分析结果显示77份样本可划分为6组。亲缘关系分析结果显示:居群内个体间的亲缘关系整体较近;居群间的亲缘关系与地理距离有一定的相关性。遗传分化和基因流分析结果显示:大部分居群间存在较高的遗传分化,各居群间存在一定程度的基因交流。综上所述,堇叶紫金牛13个居群的整体遗传多样性偏低,但居群间的遗传分化程度较高,这与居群间的地理距离较远、基因交流较少有关。建议优先保护安徽省黄山市祁门县牯牛降、浙江省舟山市定海区蔡家岙和浙江省宁波市象山县屠家园村3个遗传多样性较高的居群,并开展相关繁育工作以维持和扩大居群数量。
基金Supported by the National Natural Science Foundation of China, Grant No. 30470125, and the Natural Science Foundation of Guangdong Province, Grant No. 31255.
