G. J. Speckmann

615 total citations
22 papers, 428 citations indexed

About

G. J. Speckmann is a scholar working on Plant Science, Molecular Biology and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, G. J. Speckmann has authored 22 papers receiving a total of 428 indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Plant Science, 8 papers in Molecular Biology and 5 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in G. J. Speckmann's work include Chromosomal and Genetic Variations (7 papers), Plant tissue culture and regeneration (6 papers) and Nematode management and characterization studies (4 papers). G. J. Speckmann is often cited by papers focused on Chromosomal and Genetic Variations (7 papers), Plant tissue culture and regeneration (6 papers) and Nematode management and characterization studies (4 papers). G. J. Speckmann collaborates with scholars based in Netherlands, United States and Belgium. G. J. Speckmann's co-authors include T. Bock, Joan H. de Jong, C. Bachem, Michelle D. Hunt, Marc Zabeau, John C. Steffens, P. C. G. van der Linde, M. Jacobs, Kathleen D’Halluin and F. Wit and has published in prestigious journals such as Theoretical and Applied Genetics, Euphytica and Genome.

In The Last Decade

G. J. Speckmann

21 papers receiving 355 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
G. J. Speckmann Netherlands 11 361 216 61 38 25 22 428
G. A. Marx United States 14 471 1.3× 311 1.4× 74 1.2× 15 0.4× 18 0.7× 23 538
W. E. Sackston Canada 15 629 1.7× 221 1.0× 41 0.7× 23 0.6× 34 1.4× 58 657
Herculano Penna Medina-Filho Brazil 7 405 1.1× 231 1.1× 38 0.6× 21 0.6× 19 0.8× 12 497
Ernest D. P. Whelan Canada 13 416 1.2× 153 0.7× 32 0.5× 10 0.3× 34 1.4× 48 454
B. Sharma 7 223 0.6× 96 0.4× 31 0.5× 14 0.4× 26 1.0× 13 276
D. J. Wolyn Canada 13 401 1.1× 216 1.0× 23 0.4× 42 1.1× 56 2.2× 30 475
Driss Iraqi Morocco 8 266 0.7× 185 0.9× 29 0.5× 24 0.6× 28 1.1× 25 308
Vibeke Alm Norway 7 506 1.4× 605 2.8× 142 2.3× 20 0.5× 39 1.6× 10 815
A. Hagberg Sweden 13 564 1.6× 168 0.8× 73 1.2× 42 1.1× 59 2.4× 41 650
Chen Shifriss Israel 11 384 1.1× 167 0.8× 30 0.5× 14 0.4× 4 0.2× 26 426

Countries citing papers authored by G. J. Speckmann

Since Specialization
Citations

This map shows the geographic impact of G. J. Speckmann's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by G. J. Speckmann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G. J. Speckmann more than expected).

Fields of papers citing papers by G. J. Speckmann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by G. J. Speckmann. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by G. J. Speckmann. The network helps show where G. J. Speckmann may publish in the future.

Co-authorship network of co-authors of G. J. Speckmann

This figure shows the co-authorship network connecting the top 25 collaborators of G. J. Speckmann. A scholar is included among the top collaborators of G. J. Speckmann based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with G. J. Speckmann. G. J. Speckmann is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Bachem, C., G. J. Speckmann, P. C. G. van der Linde, et al.. (1994). Antisense Expression of Polyphenol Oxidase Genes Inhibits Enzymatic Browning in Potato Tubers. Bio/Technology. 12(11). 1101–1105. 88 indexed citations
2.
Lange, W., T. Bock, G. J. Speckmann, & Joan H. de Jong. (1993). Disomic and ditelosomic alien chromosome additions in beet (Beta vulgaris), carrying an extra chromosome of B. procumbens or telosome of B. patellaris. Genome. 36(2). 261–267. 3 indexed citations
3.
Speckmann, G. J., et al.. (1987). In vitro induction of haploid plants from unpollinated ovules and ovaries of the sugarbeet (Beta vulgaris L.). Theoretical and Applied Genetics. 73(6). 920–925. 46 indexed citations
4.
Jong, Joan H. de, G. J. Speckmann, T. Bock, W. Lange, & A. van Voorst. (1986). Alien chromosome fragments conditioning resistance to beet cyst nematode in diploid descendants from monosomic additions of Beta procumbens to B. vulgaris. Canadian Journal of Genetics and Cytology. 28(3). 439–443. 23 indexed citations
5.
Speckmann, G. J., T. Bock, & Joan H. de Jong. (1985). Monosomic additions with resistance to beet cyst nematode obtained from hybrids of Beta vulgaris and wild Beta species of the section Patellares. I. Morphology, transmission and level of resistance. 27 indexed citations
6.
Jong, Joan H. de, G. J. Speckmann, T. Bock, & A. van Voorst. (1985). Monosomic addit. with resist. to Beet cyst nematode obtained from hybr. of Beta vulg.& wild Beta spec. section Patellares.II.Compar. anal. of alien chromosome. 95. 84–94. 9 indexed citations
7.
8.
Speckmann, G. J., et al.. (1980). Autotetraploidy in caraway (Carum carvi L.) for the increase of the aetheric oil content of the seed. Euphytica. 29(1). 89–96. 28 indexed citations
9.
Speckmann, G. J., et al.. (1972). Chromosome number and plant morphology in some ecotypes of Poa pratensis L.. Euphytica. 21(2). 171–180. 30 indexed citations
10.
Speckmann, G. J., et al.. (1968). Numbers of chloroplasts and pollen grain pores in diploid and tetraploid varieties of some Trifolium species. Euphytica. 17(3). 357–362. 18 indexed citations
11.
12.
Dijkstra, J. & G. J. Speckmann. (1965). Germinal pore number in pollen grains as a selection basis in the production of tetraploid clover. Euphytica. 14(3). 244–248. 5 indexed citations
13.
Speckmann, G. J., et al.. (1965). The length of stomata as an indicator for polyploidy in rye-grasses. Euphytica. 14(3). 225–230. 60 indexed citations
14.
Speckmann, G. J.. (1964). The mutagenic effect of treatment with EMS at different temperatures in Pisum sativum. Euphytica. 13(3). 337–344. 6 indexed citations
15.
Speckmann, G. J., et al.. (1959). The yielding capacity of tetraploid sugar and fodder beets. Euphytica. 8(1). 29–36. 3 indexed citations
16.
Speckmann, G. J., et al.. (1956). The creation of tetraploid beets. Euphytica. 5(3). 308–322.
17.
Speckmann, G. J.. (1955). A rapid laboratory method for cytological control in polyploidy breeding. Euphytica. 4(2). 163–166. 4 indexed citations
18.
Speckmann, G. J., et al.. (1954). The creation of tetraploid beets. Euphytica. 3(2). 154–160. 16 indexed citations
19.
Speckmann, G. J., et al.. (1954). The creation of tetraploid beets. Euphytica. 3(1). 35–42. 6 indexed citations
20.
Speckmann, G. J., et al.. (1953). The creation of tetraploid beets. Euphytica. 2(3). 187–196. 9 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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