In addition , it introduces the characteristics and identification methods of medicinal plants , and latest achievements obtained in chromosome doubling of medicinal plants in recent years 此外，还介绍了多倍体药用植物的特征、鉴定方法以及近些年来药用植物染色体加倍所取得的最新成果。
Polyploid watermelon has many virtues such as seedless , high yield , good tolerance and transportation , high resistance to plant diseases and insect pests , and also high central soluble solids content 摘要多倍体西瓜具有少籽、丰产、耐贮、对病虫害抗性较强、抗逆性好、果实含糖量高等优点。
Polyploidy is far more common in plants than in animals and very high chromosome number may be found ; for example in octaploids and decaploids ( containing eight and ten times the haploid chromosome number ) 多倍体现象在植物中比在动物中更为普遍，且染色体组数量较大，如八倍体和十倍体（即含有八倍或十倍的单倍染色体数目） 。
Furthermore , the same amphidiploid showed different representation in different developmental characters , i . e . the amphidiploid resembled one of the parents in one developmental character , but it resembled the other in another character 同一个多倍体品种在不同发育性状上具有不同的表现，即在某一发育性状上偏向于其祖先亲本之一，而在另一发育性状上偏向其另一祖先亲本。
Haploid organisms have one genome , diploid organisms have two homologous sets , polyploid organisms have many sets sometimes form the same ancestor ( autopolyploids ) and sometimes from different ancestor ( allopolyploids ) 单倍体生物有一个基因组；二倍体生物有两个同源的基因组；多倍体生物有多个基因组，它们可能源于同一祖先（同源多倍体） ，也可源自不同的祖先（异源多倍体） 。
Forty - two steady tetraploid lines induced by the colchicines had been created from 1994 to 1996 , three high - yield lines and eight high - sugar content lines have been selectively bred through plot identification trial during the years of 2001 to 2003 1994 ~ 1996年用秋水仙碱诱变出四倍体稳定系42个，经2001 ~ 2003年小区鉴定，选育出高产品系3个，高糖品系8个，为甜菜多倍体育种创造了宝贵的基础材料。
And the regenerated tetraploid and its diploid were different in inheritance . by the upper research , the best induction method of pepper polyploid and appropriate concentration and periods of colchicines were obtained . the acknowledge of polyploid was deeper via the morphological and cytological examination and peroxidase isozymes 通过以上研究，我们得到了辣椒同源四倍体诱导的最佳方法和秋水仙碱的最佳处理浓度和处理时间，并从过氧化物同功酶变化，辅以形态解剖学观察、染色体鉴定，综合分析，对多倍体的认识更加深入细致。
Based on the comparative analysis of style , stigma size , pod length and width , pod surface area , seed diameter and dry weight between amphidiploids and their putative diploid ancestors , we observed that some accessions of amphidiploids revealed intermediate state between the two putative parents , others resembled only one of the parents 摘要通过比较分析薹属多倍体复合种与其祖先二倍体基本种在花柱、柱头大小、角果长度、宽度、种子直径及种子干重变化上的异同，发现多倍体复合种在这些发育性状上表现出处于两个祖先二倍体亲本之间，或只偏向于其中一个祖先亲本。
Based on extensive field observation and population sampling in 71 populations of 20 provinces , this dissertation investigates morphology , ecology , cytology , cytogeography and its sequences of this complex . the results show that a . ageratoides polyploid complex might be originated in northeastern china , from which it migrated along three different routes 本研究基于对我国20个省、市、自治区43个地点71个三脉紫菀复合体居群的野外观察和采集，从形态学、生态学、细胞学、细胞地理学和分子生物学等各方面，对三脉紫菀多倍体复合体进行了综合性研究。
To explore the potential values of autopolyploid rice , the authors thought that it was worth studying mere in the following four aspects : the possibility in direct utilization of autotetraploid rice , the possibility in utilization of heterosis of autotetraploid rice , the possibility in transfer of allogenic substances and the enrichment of rice gene by using autopolyploid rice en the bridging parent , and the genetic tides of important characters in autopolyploid rice 为了挖掘同源多倍体水稻的潜在利用价值，在今后的研究中有如下4条途径值得探索，即探索直接利用同源四倍体水稻的可能性、探索利用同源四倍体水稻杂种优势的可能性、探索以同源多倍体水稻为桥梁完成异源遗传物质转移和丰富水稻基因库的可能性探索同源多倍体水稻特征特性的遗传规律。
