Three natural population of l. Sagitta, add up to 62 individual, with 17 random primers, 128 polymorphic loci.

箭叶橐吾的三个自然居群，总计62个个体，使用17个随机引物，共扩增出128个多态位点。

Explanation: The small constellation Sagitta sports this large piece of cosmic jewelry, dubbed the Necklace Nebula.

解说： 小小的天箭座展现出这副巨大的星际首饰的形态，因此有了项链星云的绰号。

Branching intensity and rhizome length of L. virgaurea and L. sagitta increased with the increasing of resource level.

叶 橐吾的分枝强度、间隔子长度都随资源水平的增加而增加。

The tolerance to quickly-changed temperature and salinity, and gradually-changed temperature and salinity in Sagitta crassa were studied.

研究强壮箭虫对突变温度、突变盐度和渐变温度、渐变盐度的耐受性。

The feeding selectivity of Sagitta crassa, some ecological factors effect to the feeding rate and their diurnal feeding rhythm were experimentally studied in this paper.

实验研究了强壮箭虫对几种食物的摄食选择性和几种生态因子对其摄食率的影响，以及摄食的昼夜节律。