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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Animal Science and Veterinary 33 2013 1837 583 484 129 3925

Rodger K. Johnson publications per year

The chart shows the history of publications by Rodger K. Johnson between 1979 and 2024, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Rodger K. Johnson published across 46 years, from 1979 to 2024, averaging 2.9 papers a year. Output peaked at 11 publications in 2004. 1 of the 134 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1979 to 2024. Vertical axis: number of publications, 0 to 11. Peak 11 publications in 2004. 1979: 1 publication 1980: 2 publications 1981: 2 publications 1982: 2 publications 1983: 4 publications 1984: 7 publications 1985: 2 publications 1986: 1 publication 1987: 1 publication 1988: 4 publications 1989: 5 publications 1990: 2 publications 1991: 4 publications 1992: 2 publications 1993: 4 publications 1994: 2 publications 1995: 5 publications 1996: 2 publications 1997: 3 publications 1998: 3 publications 1999: 3 publications 2000: 5 publications 2001: 4 publications 2002: 7 publications 2003: 4 publications 2004: 11 publications 2005: 7 publications 2006: 5 publications 2007: 1 publication 2008: 7 publications 2009: 5 publications 2010: 2 publications 2011: 5 publications 2012: 1 publication 2013: 1 publication 2014: 3 publications 2015: 0 publications 2016: 1 publication 2017: 1 publication 2018: 0 publications 2019: 1 publication 2020: 0 publications 2021: 1 publication 2022: 0 publications 2023: 0 publications 2024: 1 publication
1979 2024

134 publications in total across all disciplines

View publications per year as a table
Rodger K. Johnson: publications per year, 1979 to 2024
Year Publications
1979 1
1980 2
1981 2
1982 2
1983 4
1984 7
1985 2
1986 1
1987 1
1988 4
1989 5
1990 2
1991 4
1992 2
1993 4
1994 2
1995 5
1996 2
1997 3
1998 3
1999 3
2000 5
2001 4
2002 7
2003 4
2004 11
2005 7
2006 5
2007 1
2008 7
2009 5
2010 2
2011 5
2012 1
2013 1
2014 3
2015 0
2016 1
2017 1
2018 0
2019 1
2020 0
2021 1
2022 0
2023 0
2024 1
Total 134
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Rodger K. Johnson publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where Rodger K. Johnson sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 84 bars. Horizontal axis: publications, 29–33 to 442+. Vertical axis: number of scientists, 0 to 109. Most scientists, 109, have 119–123 publications. The last bar groups every scientist with 442 publications or more. The highlighted bar, 129–133 publications, is where this scientist sits. 29–33 publications: 1 scientist 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29–33 publications 442+

This scientist: 129 publications — 44th percentile

44% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 442 publications or more.

View publications distribution as a table
Number of Animal Science and Veterinary scientists by publication count, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
Publications Scientists This scientist
29–33 1
34–38 6
39–43 17
44–48 23
49–53 28
54–58 44
59–63 66
64–68 75
69–73 71
74–78 85
79–83 108
84–88 105
89–93 84
94–98 103
99–103 97
104–108 95
109–113 89
114–118 88
119–123 109
124–128 93
129–133 89 129
134–138 95
139–143 92
144–148 80
149–153 75
154–158 74
159–163 67
164–168 53
169–173 62
174–178 63
179–183 50
184–188 55
189–193 50
194–198 27
199–203 44
204–208 31
209–213 28
214–218 38
219–223 33
224–228 36
229–233 29
234–238 35
239–243 23
244–248 24
249–253 29
254–258 28
259–263 21
264–268 25
269–273 11
274–278 18
279–283 13
284–288 18
289–293 10
294–298 12
299–303 11
304–308 15
309–313 14
314–318 14
319–323 8
324–328 8
329–333 13
334–338 14
339–343 13
344–348 10
349–353 11
354–358 5
359–363 8
364–368 8
369–373 6
374–378 7
379–383 8
384–388 3
389–393 4
394–398 5
399–403 8
404–408 5
409–413 4
414–418 3
419–423 8
424–428 5
429–433 3
434–438 5
439–441 5
442+ 99
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Rodger K. Johnson D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where Rodger K. Johnson sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 58 bars. Horizontal axis: D-Index, 20 to 77+. Vertical axis: number of scientists, 0 to 158. Most scientists, 158, have 31 D-Index. The last bar groups every scientist with 77 D-Index or more. The highlighted bar, 33 D-Index, is where this scientist sits. 20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 33 D-Index — 39th percentile

39% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

View D-Index distribution as a table
Number of Animal Science and Veterinary scientists by D-index, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
D-Index Scientists This scientist
20 5
21 22
22 31
23 44
24 53
25 66
26 80
27 101
28 106
29 116
30 154
31 158
32 143
33 137 33
34 126
35 134
36 112
37 115
38 105
39 111
40 107
41 87
42 74
43 62
44 61
45 41
46 51
47 43
48 28
49 47
50 40
51 34
52 33
53 43
54 16
55 32
56 21
57 18
58 28
59 33
60 17
61 21
62 18
63 21
64 9
65 20
66 11
67 16
68 12
69 17
70 13
71 15
72 11
73 11
74 14
75 5
76 6
77+ 100
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Research.com Recognitions

  • 2013 - Morrison Award, American Society of Animal Science

Overview

Rodger K. Johnson is affiliated with the University of Nebraska-Lincoln in the United States, where their research primarily focuses on Environmental Science, Biochemistry, Genetics and Molecular Biology, and Social Sciences. Their work spans several subfields, including Ecology, Genetics, Small Animals, Health, and Infectious Diseases.

Johnson's research explores a variety of topics closely related to livestock and wildlife, including genetic and phenotypic traits in livestock, genetic mapping and diversity in plants and animals, animal behavior and welfare studies, wildlife ecology and conservation, ecology and biodiversity studies, animal ecology and behavior studies, and vaccine coverage and hesitancy.

Recent scholarly contributions include:

  • Applying functional genomics research to the study of pig reproduction (2020, Bioscientifica Proceedings)
  • Effects of restricting energy during the gilt development period on growth and reproduction of lines differing in lean growth rate: responses in reproductive performance and longevity (2021, Journal of Animal Science)
  • Influencing prolificacy of sows by selection for physiological factors (2020, Bioscientifica Proceedings)

Johnson has frequently published in the Bioscientifica Proceedings and the Journal of Animal Science. These venues reflect a focus on the biological and agricultural sciences.

Their research collaborations include work with Daniel Pomp, Alexandre Rodrigues Caetano, A. R. Bertani, C. D. Gladney, and Melanie D Trenhaile-Grannemann.

In recognition of their contributions to the field, Johnson received the Morrison Award from the American Society of Animal Science in 2013.

Best Publications

  • Responses in ovulation rate, embryonal survival, and litter traits in swine to 14 generations of selection to increase litter size

    Rodger K. Johnson;Merlyn K. Nielsen;David S. Casey

  • CANDIDATE GENE ANALYSIS FOR LOCI AFFECTING LITTER SIZE AND OVULATION RATE IN SWINE

    R. C. Linville;Daniel Pomp;R. K. Johnson;Max F. Rothschild

  • Identification of quantitative trait loci affecting reproduction in pigs.

    J. P. Cassady;R. K. Johnson;D. Pomp;G. A. Rohrer

  • Evidence for quantitative trait loci affecting ovulation rate in pigs.

    Thomas A. Rathje;G. A. Rohrer;R. K. Johnson

  • Direct responses to selection for increased litter size, decreased age at puberty, or random selection following selection for ovulation rate in swine.

    W. R. Lamberson;R. K. Johnson;Dwane R. Zimmerman;T. E. Long

  • Animal model estimation of genetic parameters and response to selection for litter size and weight, growth, and backfat in closed seedstock populations of large white and Landrace swine.

    Jose Bento S. Ferraz;Rodger K. Johnson

  • Selection for components of reproduction in swine

    Rodger K Johnson;Dwane R Zimmerman;Roger J Kittok

  • Differential immunity in pigs with high and low responses to porcine reproductive and respiratory syndrome virus infection.

    D B Petry;J Lunney;P Boyd;D Kuhar

  • The National Pork Producers Council Maternal Line National Genetic Evaluation Program: a comparison of six maternal genetic lines for female productivity measures over four parities.

    S. J. Moeller;R. N. Goodwin;R. K. Johnson;J. W. Mabry

  • Biological responses to porcine respiratory and reproductive syndrome virus in pigs of two genetic populations.

    D. B. Petry;J. W. Holl;J. S. Weber;Alan R. Doster

  • CROSSBREEDING IN SWINE: EXPERIMENTAL RESULTS

    Rodger K. Johnson

  • TESTICULAR GROWTH IN BOARS OF DIFFERENT GENETIC LINES AND ITS RELATIONSHIP TO REPRODUCTIVE PERFORMANCE

    Allan Schinckel;R. K. Johnson;R. A. Pumfrey;Dwane R. Zimmerman

  • A genome scan for quantitative trait loci and imprinted regions affecting reproduction in pigs

    J. W. Holl;J. P. Cassady;D. Pomp;R. K. Johnson

  • National Pork Producers Council Maternal Line National Genetic Evaluation Program: A comparison of sow longevity and trait associations with sow longevity

    T. Serenius;K. J. Stalder;T. J. Baas;J. W. Mabry

  • Changes in Ovulation Rate, Uterine Capacity, Uterine Dimensions, and Parity Effects with Selection for Litter Size in Swine

    Luis L. T. Gama;R. K. Johnson

  • Effect of selection for size of testes in boars on semen and testis traits

    Ying-Tsorn Huang;Rodger K. Johnson

  • Microarray Profiling for Differential Gene Expression in Ovaries and Ovarian Follicles of Pigs Selected for Increased Ovulation Rate

    Alexandre Rodrigues Caetano;Rodger K. Johnson;J. Joe Ford;Daniel Pomp

  • EFFECT OF TALLOW AND CHOLINE CHLORIDE ADDITION TO THE DIET OF SOWS ON MILK COMPOSITION, MILK YIELD AND PREWEANING PIG PERFORMANCE

    R. D. Boyd;B. D. Moser;E. R. Peo;A. J. Lewis

  • Direct and correlated responses to two-stage selection for ovulation rate and number of fully formed pigs at birth in swine.

    A Ruíz-Flores;R K Johnson

  • Evaluation of gene expression in pigs selected for enhanced reproduction using differential display PCR and human microarrays: I. Ovarian follicles

    C. D. Gladney;G. R. Bertani;R. K. Johnson;Daniel Pomp

  • Estimation of genetic parameters for average daily gain using models with competition effects

    C. Y. Chen;S. D. Kachman;R. K. Johnson;S. Newman

  • Ten generations of selection for predicted weight of testes in swine: direct response and correlated response in body weight, backfat, age at puberty, and ovulation rate.

    Rodger K. Johnson;Gregg R. Eckardt;Thomas A. Rathje;Denise K. Drudik

  • Correlated response in placental efficiency in swine selected for an index of components of litter size

    H. Mesa;T. J. Safranski;R. K. Johnson;W. R. Lamberson

  • Factors associated with sow stayability in 6 genotypes.

    M. Knauer;K. J. Stalder;T. Serenius;T. J. Baas

  • Genome‐wide prediction of age at puberty and reproductive longevity in sows

    Julie Kathleen Tart;Rodger K. Johnson;Justin W Bundy;N. N. Ferdinand

  • Inheritance of Teat Number and its Relationship to Maternal Traits in Swine

    R. A. Pumfrey;R. K. Johnson;P. J. Cunningham;Dwane R. Zimmerman

  • Identifying putative candidate genes and pathways involved in immune responses to porcine reproductive and respiratory syndrome virus (PRRSV) infection.

    M. Wysocki;H. Chen;J. P. Steibel;D. Kuhar

  • Responses to 19 generations of litter size selection in the Nebraska Index line. I. Reproductive responses estimated in pure line and crossbred litters

    D. B. Petry;Rodger K. Johnson

  • Generation and sequence characterization of a normalized cDNA library from swine ovarian follicles

    Alexandre R. Caetano;Rodger K. Johnson;Daniel Pomp

Frequent Co-Authors

Austin Lewis
Austin Lewis University of Nebraska–Lincoln
Daniel Pomp
Daniel Pomp University of North Carolina at Chapel Hill
O. W. Robison
O. W. Robison North Carolina State University
Michael D. Tokach
Michael D. Tokach Kansas State University
R.K. Miller
R.K. Miller Texas A&M University
E. R. Peo
E. R. Peo University of Nebraska–Lincoln
L.D. Van Vleck
L.D. Van Vleck United States Department of Agriculture
Max F. Rothschild
Max F. Rothschild Iowa State University
Chris R. Calkins
Chris R. Calkins University of Nebraska–Lincoln
Luis T. Gama
Luis T. Gama University of Lisbon

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Related Online Degrees & Career Pathways

For those interested in expanding their expertise beyond traditional Animal Science and Veterinary studies, several related online degrees offer valuable career pathways. For example, students passionate about physical health and rehabilitation may explore online exercise science degrees. These programs provide essential knowledge on human and animal biomechanics, which can complement veterinary expertise.

Behavioral analysis is another promising field. Pursuing top programs in applied behavior analysis can lead to becoming a Board Certified Behavior Analyst (BCBA). You can find a selection of the best schools for BCBA offering flexible online certification courses that fit varied schedules.

Understanding psychological foundations is often key to working effectively with animals and their owners. Programs approved by the National Association of School Psychologists (NASP) are available in an online format, helping students earn credentials in mental health and education through nasp approved online school psychology programs.

For advanced clinical psychology learners interested in doctoral degrees, exploring apa accredited psyd programs online could provide a pathway without the barrier of GRE requirements. This flexibility allows students to focus on specialized fields that may overlap with veterinary behavioral medicine or animal-human interaction studies.

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