In order to detect the genetic relationship of different Cotoneaster schantungensis natural populations, 16 samples were selected for genetic diversity analysis based on SRAP markers. Twelve pairs primers were selecte...In order to detect the genetic relationship of different Cotoneaster schantungensis natural populations, 16 samples were selected for genetic diversity analysis based on SRAP markers. Twelve pairs primers were selected out, 93 bands were amplified, of which 91 bands (97.85%) were polymorphic. At species level, the average value of Nei’s genetic diversity (H) was 0.2213, Shannon’s information index (I) was 0.3596, whereas at population level, they were 0.1955, 0.3121, the percentage of polymorphic loci was 75.27%. The genetic differentiation coefficient in populations (Gst) was 0.0788, gene flow Nm was 5.8467, indicating that there was 7.88% of the variation among populations and 92.12% of the variance within populations and the variation within populations was relatively high. These results indicate that C. schantungensis has high genetic diversity and low differentiation among populations. Although most Cotoneaster species are apomictic, C. schantungensis, however, may be an exception.展开更多
重新界定了栒子属(Cotoneaster)高山组(Sect. Alpigeni Hurusawa)黄杨叶系(Series Buxifolii Klotz)的范围,仅含4种植物,即C. buxifolius Wall. ex Lindl., C. delavayanus Klotz, C. insolitus Klotz和C. poluninii Klotz。将原作者建...重新界定了栒子属(Cotoneaster)高山组(Sect. Alpigeni Hurusawa)黄杨叶系(Series Buxifolii Klotz)的范围,仅含4种植物,即C. buxifolius Wall. ex Lindl., C. delavayanus Klotz, C. insolitus Klotz和C. poluninii Klotz。将原作者建立该系时包含的5种,即C. argenteus Klotz ; C. brevirameus Rehd. & Wils.; C. hodjingensis Klotz; C. lijiangensis Klotz; C. rockii Klotz,被原作者置另一系的C. marginatus Lindl. ex Schlecht. 以及被俞德浚教授等误认为红花栒子小叶变种C. rubens var. miniatus Yu,一共7个名称归并为黄杨叶栒子(C. buxifolius Lindl.)的同物异名;又把C. buxifolius f. vellaea Franch.和C. astrophores J. Fryer et E. C. Nelson归并为绒毛细叶栒子C. poluninii Klotz同一种。经修订后的黄杨叶系在栒子属高山组中以普遍直立的习性,叶下表面、萼片和萼筒密被绒毛和常具2个小核等特征组成相对自然的一群。展开更多
2005年7月26日，作为世界3大国际广播电台之一的中国国际广播电台（China Radio International，CRI）在北京通过中国机械进出口招标总公司向北京恒智数码科技有限公司正式下发了环球华语广播改造项目的中标通知书，采购恒智数码代理的K...2005年7月26日，作为世界3大国际广播电台之一的中国国际广播电台（China Radio International，CRI）在北京通过中国机械进出口招标总公司向北京恒智数码科技有限公司正式下发了环球华语广播改造项目的中标通知书，采购恒智数码代理的KLOTZ数字网络直播调音台11张，恒智数码也因此成为此次广电总局政府采购的最大赢家。展开更多
文摘In order to detect the genetic relationship of different Cotoneaster schantungensis natural populations, 16 samples were selected for genetic diversity analysis based on SRAP markers. Twelve pairs primers were selected out, 93 bands were amplified, of which 91 bands (97.85%) were polymorphic. At species level, the average value of Nei’s genetic diversity (H) was 0.2213, Shannon’s information index (I) was 0.3596, whereas at population level, they were 0.1955, 0.3121, the percentage of polymorphic loci was 75.27%. The genetic differentiation coefficient in populations (Gst) was 0.0788, gene flow Nm was 5.8467, indicating that there was 7.88% of the variation among populations and 92.12% of the variance within populations and the variation within populations was relatively high. These results indicate that C. schantungensis has high genetic diversity and low differentiation among populations. Although most Cotoneaster species are apomictic, C. schantungensis, however, may be an exception.
文摘重新界定了栒子属(Cotoneaster)高山组(Sect. Alpigeni Hurusawa)黄杨叶系(Series Buxifolii Klotz)的范围,仅含4种植物,即C. buxifolius Wall. ex Lindl., C. delavayanus Klotz, C. insolitus Klotz和C. poluninii Klotz。将原作者建立该系时包含的5种,即C. argenteus Klotz ; C. brevirameus Rehd. & Wils.; C. hodjingensis Klotz; C. lijiangensis Klotz; C. rockii Klotz,被原作者置另一系的C. marginatus Lindl. ex Schlecht. 以及被俞德浚教授等误认为红花栒子小叶变种C. rubens var. miniatus Yu,一共7个名称归并为黄杨叶栒子(C. buxifolius Lindl.)的同物异名;又把C. buxifolius f. vellaea Franch.和C. astrophores J. Fryer et E. C. Nelson归并为绒毛细叶栒子C. poluninii Klotz同一种。经修订后的黄杨叶系在栒子属高山组中以普遍直立的习性,叶下表面、萼片和萼筒密被绒毛和常具2个小核等特征组成相对自然的一群。
文摘2005年7月26日，作为世界3大国际广播电台之一的中国国际广播电台（China Radio International，CRI）在北京通过中国机械进出口招标总公司向北京恒智数码科技有限公司正式下发了环球华语广播改造项目的中标通知书，采购恒智数码代理的KLOTZ数字网络直播调音台11张，恒智数码也因此成为此次广电总局政府采购的最大赢家。
