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Soybean Cyst Nematode Population Development and Its Effect on Pennycress in a Greenhouse Study

Cody Hoerning
Cody Hoerning
, 
Senyu Chen
Senyu Chen
, 
Katherine Frels
Katherine Frels
, 
Donald Wyse
Donald Wyse
, 
Samantha Wells
Samantha Wells
 et 
James Anderson
James Anderson
   | 11 avr. 2022
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Article Category: Research Paper
Publié en ligne: 11 avr. 2022
Pages: -
Reçu: 16 févr. 2021
DOI: https://doi.org/10.2478/jofnem-2022-0006
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© 2022 Cody Hoerning et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Influence of inoculation level and crop treatment on final SCN egg population density in the greenhouse evaluation experiment. Soybean-S was soybean genotype ‘Sturdy’; PC-MN103 was pennycress genotype ‘MN103’; PC-MN106 was pennycress genotype ‘MN106’; and PC-MN108 was pennycress genotype ‘MN108’. The genotypes were sourced from the University of Minnesota pennycress and soybean breeding programs. Error bars denote standard error. Within an inoculation level, bars with the same lowercase letter did not differ in SCN population density using Tukey–Kramer least-square means (P < 0.05). SCN, soybean cyst nematode.
Influence of inoculation level and crop treatment on final SCN egg population density in the greenhouse evaluation experiment. Soybean-S was soybean genotype ‘Sturdy’; PC-MN103 was pennycress genotype ‘MN103’; PC-MN106 was pennycress genotype ‘MN106’; and PC-MN108 was pennycress genotype ‘MN108’. The genotypes were sourced from the University of Minnesota pennycress and soybean breeding programs. Error bars denote standard error. Within an inoculation level, bars with the same lowercase letter did not differ in SCN population density using Tukey–Kramer least-square means (P < 0.05). SCN, soybean cyst nematode.

Likelihood-ratio χ2-test for SCN population density, as influenced by crop ([C]: MN103, MN106, MN108, and soybean), HG type (HG Types 0, 2.5.7, and 1.3.6), and inoculation ([I]: 0, 2,000, and 20,000 eggs/100 cm3 soil).

Source of fixed variation χ2 Numerator Df P-value
Crop (C) 96.1514 3 < 2.2e−16***
HG type (H) 1.4823 2 0.4766
Inoculation (I) 38.4078 1 5.74e−10***
C × H 2.9414 6 0.8162
C × I 38.9127 3 1.81e−08***
H × I 1.1895 2 0.5517
C × H × I 5.5155 6 0.4796

Two-sided t-test results of the crop treatments at inoculation level of 2,000 eggs/100 cm3 soil.

Crop Mean t Df Sig. t
MN 103 1,999 −0.003 22 0.999
MN 106 2,258 0.493 23 0.627
MN 108 1,621 −0.908 22 0.374
Soybean 9,601 4.437 23 0.0002***

Likelihood-ratio χ2-test for RF, as influenced by crop ([C]: MN103, MN106, MN108, and soybean), HG type (HG Types 0, 2.5.7, and 1.3.6), and inoculation ([I]: 0, 2,000, and 20,000 eggs/100 cm3 soil).

Source of fixed variation χ2 Numerator Df P-value
Crop (C) 84.963 3 < 2.2e−16***
HG type (H) 1.2603 2 0.532513
Inoculation (I) 20.9222 1 4.78e−06***
C × H 0.648 6 0.995546
C × I 12.5867 3 0.005621**
H × I 0.8214 2 0.663195
C × H × I 3.7566 6 0.709577

Likelihood-ratio χ2-test for crop treatment biomass as influenced by inoculation ([I]: 0, 2,000, and 20,000 eggs/100 cm3 soil).

Crop χ2 Numerator Df P-value
MN 103 3.704 2 0.1569
MN 106 0.393 2 0.8216
MN 108 0.06 2 0.9705
Soybean ‘Sturdy’ 2.58 2 0.2752

Two-sided t-test results of the crop treatments at inoculation level of 20,000 eggs/100 cm3 soil.

Crop Mean t Df Sig. t
MN 103 5,777 −11.712 20 2.09e−10***
MN 106 6,559 −10.676 23 2.19e−10***
MN 108 7,667 −7.738 23 7.55e−08***
Soybean 4,0739 3.185 23 0.004**

Shoot biomass as determined by inoculation level of pennycress and soybean lines.

Crop Biomass (g) at treatment level of
0 eggs/100 cm3 2,000 eggs/100 cm3 20,000 eggs/100 cm3
MN103 7.13 8.75 8.49
MN106 8.16 8.70 8.30
MN108 9.04 9.05 9.08
Susceptible soybean ‘Sturdy’ 12.41 13.92 12.59

Reproductive factor for crop treatment.

Crop RF (Pf/Pi) at treatment level of
2,000 eggs 100/cm3 20,000 eggs 100/cm3
MN103 1.00 a 0.29 a
MN106 1.13 a 0.33 a
MN108 0.81 a 0.38 a
Susceptible soybean ‘Sturdy’ 4.80 b 2.04 b
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