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,還介紹了多倍體藥用植物的特征、鑒定方法以及近些年來藥用植物染色體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 摘要多倍體西瓜具有少籽、豐產(chǎn)、耐貯、對病蟲害抗性較強、抗逆性好、果實含糖量高等優(yōu)點。
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 ) 多倍體現(xiàn)象在植物中比在動物中更為普遍,且染色體組數(shù)量較大,如八倍體和十倍體(即含有八倍或十倍的單倍染色體數(shù)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 同一個多倍體品種在不同發(fā)育性狀上具有不同的表現(xiàn),即在某一發(fā)育性狀上偏向于其祖先親本之一,而在另一發(fā)育性狀上偏向其另一祖先親本。
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 ) 單倍體生物有一個基因組;二倍體生物有兩個同源的基因組;多倍體生物有多個基因組,它們可能源于同一祖先(同源多倍體) ,也可源自不同的祖先(異源多倍體) 。
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年用秋水仙堿誘變出四倍體穩(wěn)定系42個,經(jīng)2001 ~ 2003年小區(qū)鑒定,選育出高產(chǎn)品系3個,高糖品系8個,為甜菜多倍體育種創(chuàng)造了寶貴的基礎(chǔ)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 通過以上研究,我們得到了辣椒同源四倍體誘導的最佳方法和秋水仙堿的最佳處理濃度和處理時間,并從過氧化物同功酶變化,輔以形態(tài)解剖學觀察、染色體鑒定,綜合分析,對多倍體的認識更加深入細致。
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 摘要通過比較分析薹屬多倍體復合種與其祖先二倍體基本種在花柱、柱頭大小、角果長度、寬度、種子直徑及種子干重變化上的異同,發(fā)現(xiàn)多倍體復合種在這些發(fā)育性狀上表現(xiàn)出處于兩個祖先二倍體親本之間,或只偏向于其中一個祖先親本。
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 本研究基于對我國20個省、市、自治區(qū)43個地點71個三脈紫菀復合體居群的野外觀察和采集,從形態(tài)學、生態(tài)學、細胞學、細胞地理學和分子生物學等各方面,對三脈紫菀多倍體復合體進行了綜合性研究。
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 為了挖掘同源多倍體水稻的潛在利用價值,在今后的研究中有如下4條途徑值得探索,即探索直接利用同源四倍體水稻的可能性、探索利用同源四倍體水稻雜種優(yōu)勢的可能性、探索以同源多倍體水稻為橋梁完成異源遺傳物質(zhì)轉(zhuǎn)移和豐富水稻基因庫的可能性探索同源多倍體水稻特征特性的遺傳規(guī)律。