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This paper studies the genetic diversity and differentiation of its nine natural populations in Zhejiang Province by using random amplified polymorphic DNA (RAPD) technique.
      
As estimated by Shannon index, the genetic diversity within H.
      
miconioides populations accounted for 27.28% of the total genetic diversity, while that among H.
      
This figure was generally consistent with that estimated by Shannon index, i.e., the genetic differentiation among populations was relatively high, but that within populations was relatively low.
      
miconioides populations was relatively low (0.198,7), and the genetic similarity ranged from 0.655,7 to 0.811,9, with an average of 0.730,6.
      
The highest genetic distance among populations was 0.422,9, while the lowest was 0.208,3.
      
All the results showed that there was a distinct genetic differentiation among H.
      
The genetic distance matrix of nine test populations was calculated using this method, and the clustering analysis was made using the unweighted pair group method with arithmetic mean (UPGMA).
      
Cloning of an APETALA3 homologous gene (PtAP3) from Populus tomentosa and genetic transformation of its sense and anti-sense con
      
RAPD analysis of genetic relationships among Sphaeropsis sapinea isolates
      
Genetic relationships were studied among 23 isolates of Sphaeropsis sapinea collected from China, the United States, England, South Africa and Chile by using a random amplification of a polymorphic DNA (RAPD) analytical method.
      
The genetic dendrogram based on RAPD analysis showed that the S.
      
The study tried to evaluate the urgency for conserving these plants, according to coefficients of closeness to disappearance, of genetic loss and of usefulness.
      
Accurate identification of varieties (clones) and knowledge of their genetic relationships are essential for poplar breeding and variety management.
      
The genetic relationships among the varieties were evaluated by dendrograms and multidimensional scaling (MDS).
      
This study indicated that tested poplar varieties could be identified by their fingerprint profiles and that genetic relationships deduced from the study were consistent with their genealogy.
      
In addition, our results demonstrated that AFLP could be used to construct DNA fingerprints of polar clones at a large-scale level and to determine genetic relationships of poplar varieties.
      
Under the selection ratio of 10%, genetic gains were 19.74% and 19.32% respectively, and selected families from the progeny test stands at the age of five years and eight years were the same.
      
Genetic correlation of height, DBH and stem volume was also significant at the level of 0.01.
      
Genetic diversity of Lithocarpus harlandii populations in three forest communities with different succession stages
      
 

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