Postinfection development of Rotylenchulus reniformis on resistant Glycine max genotypes

Number of reniform nematodes in four developmental stages (vermiform, swelling, reniform, gravid) and total number of nematodes per gram of root on susceptible (Braxton) and resistant (JTN-5203, 02011-126, and PI 404166) soybean in growth chamber tests at 2 days intervals during the first 10 DAI

Developmental stage	Soybean genotype	2 DAI		4 DAI		6 DAI		8 DAI		10 DAI
Vermiform	Braxton	0.1		0.4		0.6		0.2		0.0	- ^&
	JTN-5203	0.0		0.3		0.6		0.0		0.0	-
	PI 404166	0.0		0.7		1.1		0.0		0.0	-
	02011-126*	0.0		0.2		0.6		0.1		0.0	-
Swelling	Braxton	0.0	- ^&	1.3	b	4.8		2.0		0.7	b
	JTN-5203	0.0	-	1.4	b	7.6		1.8		3.0	a
	PI 404166	0.0	-	5.4	a	4.8		2.1		0.7	b
	02011-126*	0.0	-	1.2	b	4.3		3.2		2.5	a
Reniform	Braxton	0.0	- ^&	0.0		0.6		5.7	a	4.1
	JTN-5203	0.0	-	0.1		0.8		1.0	b	3.6
	PI 404166	0.0	-	0.1		0.5		1.6	b	1.4
	02011-126*	0.0	-	0.0		0.4		0.9	b	1.7
Gravid	Braxton	0.0	- ^&	0.0	- ^&	0.0	- ^&	2.5	a	4.1	a
	JTN-5203	0.0	-	0.0	-	0.0	-	0.2	b	1.6	ab
	PI 404166	0.0	-	0.0	-	0.0	-	0.4	b	0.6	b
	02011-126*	0.0	-	0.0	-	0.0	-	0.1	b	1.0	b
All stages combined	Braxton	0.1		1.6	b	7.1		14.3	a	10.0	a
	JTN-5203	0.0		1.9	b	9.9		4.3	b	9.9	a
	PI 404166	0.0		6.5	a	7.0		5.3	b	2.4	b
	02011-126*	0.0		1.5	b	6.7		5.4	b	5.2	ab

Within each developmental stage and interval, mean values (20 plants; pooled data from two tests) followed by the same letter are not significantly different (differences of least squares means, P ≤ 0.05).

& All values were zero so no mean values separation was possible.

* 02011-126 is breeding line 02011-126-1-1-5-1-1.

Table 2

Number of reniform nematodes in three developmental stages (swelling, reniform, gravid) and total number of nematodes per gram of root on susceptible (Braxton) and resistant (JTN-5203, 02011-126, and PI 404166) soybean in growth chamber tests at 5 days intervals from 15 to 30 DAI

Developmental stage	Soybean genotype	15 DAI		20 DAI		25 DAI		30 DAI
Swelling	Braxton	1.0		0.4		0.1	b	0.3	a
	JTN-5203	1.0		0.2		0.2	b	0.0	b
	PI 404166	0.4		0.1		0.0	b	0.0	b
	02011-126*	2.5		0.3		0.6	a	0.1	b
Reniform	Braxton	2.4		1.5	a	0.5		1.5	a
	JTN-5203	1.0		0.3	b	0.2		0.1	b
	PI 404166	0.7		0.1	b	0.1		0.2	b
	02011-126*	1.5		0.2	b	0.2		0.1	b
Gravid	Braxton	9.8	a	6.1	a	5.8	a	3.7	a
	JTN-5203	2.0	b	0.4	b	0.2	b	0.2	b
	PI 404166	0.9	b	0.1	b	0.1	b	0.1	b
	02011-126*	0.5	b	0.3	b	0.2	b	0.5	b
All stages combined	Braxton	13.7	a	8.2	a	6.4	a	5.6	a
	JTN-5203	3.9	b	0.7	b	0.5	b	0.3	b
	PI 404166	1.9	b	0.2	b	0.2	b	0.2	b
	02011-126*	4.3	b	0.7	b	0.9	b	0.6	b

[i] * 02011-126 is breeding line 02011-126-1-1-5-1-1.

Proportion of the reniform nematode population in four developmental cohorts ranging from vermiform (immature) to gravid (mature) (Y-axis) at 2 days intervals from 4 to 10 DAI (X-axis) on susceptible soybean cultivar Braxton and the resistant soybean genotypes 02011-126-1-1-5-1-1 (0211-126), JTN-5203, and PI 404166.

Proportion of the reniform nematode population in three developmental cohorts ranging from swelling (immature) to gravid (mature) (Y-axis) at 5 days intervals from 15 to 30 DAI (X-axis) on susceptible soybean cultivar Braxton and the resistant soybean genotypes 02011-126-1-1-5-1-1 (02011-126), JTN-5203, and PI 404166; none of the nematodes observed were in the vermiform stage of development on any genotype during this later stage of the infection cycle.

Table 3

Reniform nematode egg production on susceptible (Braxton) and resistant (JTN-5203, 02011-126, and PI 404166) soybean in two growth chamber tests

		25 DAI				30 DAI
			Eggs per egg mass				Eggs per egg mass
Test	Soybean line	Number of egg masses counted	Mean value	Max^$	Min^&	Number of egg masses counted	Mean value	Max^$	Min^&
1	Braxton	50	28.4a	99	0	50	35.7a	217	3
	JTN-5203	45	9.2b	50	0	37	4.1b	51	0
	PI 404166	32	6.2b	26	0	4	7.1b	20	0
	02011-126*	13	9.2b	40	0	10	2.3b	17	0
2	Braxton	50	38.5a	136	3	50	56.2a	181	3
	JTN-5203	6	2.1c	21	0	8	1.3b	6	0
	PI 404166	1	3.0bc	-	-	1	10.0ab	-	-
	02011-126*	8	9.4b	20	2	16	4.8b	16	0

Within each test and interval, mean values followed by the same letter are not significantly different (differences of least squares mean values, P ≤ 0.5).

[i] ^$maximum number of eggs per egg mass.

[ii] ^&minimum number of eggs per egg mass.

[iii] *02011-126 is breeding line 02011-126-1-1-5-1-1.

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Articles in this issue

DOI: https://doi.org/10.2478/jofnem-2026-0031 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X

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Language: English

Page range: 488 - 495

Submitted on: Dec 8, 2025

Accepted on: Sep 9, 2026

Published on: Oct 14, 2026

Published by: Society of Nematologists, Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Keywords:

Development,

Fecundity,

Post-inoculation,

Reniform nematode (Rotylenchulus reniformis),

resistant,

Soybean (Glycine max)

Related subjects:

Life sciences,

Life sciences, other

© 2026 Salliana R. Stetina, James R. Smith, Jeffery D. Ray, Chunda Feng, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 58 (2026): Issue 1 (February 2026)

Postinfection development of Rotylenchulus reniformis on resistant Glycine max genotypes

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