Biology, pathotype, and virulence of Globodera rostochiensis populations from Kenya

Mwangi, James M.; Mwangi, Grace N.; Finckh, Maria R.; Kiewnick, Sebastian

Biology, pathotype, and virulence of Globodera rostochiensis populations from Kenya

Journal of Nematology

Volume 53 (2021): Issue 1 (January 2021)

By:

James M. Mwangi, Grace N. Mwangi, Maria R. Finckh and Sebastian Kiewnick

Open Access

|Jan 2021

Figures & Tables

Figure showing the mean number of different developmental stages of Globodera rostochiensis, ‘HAR1’ and ‘Ecosse’ populations in resistant cv. ‘Laura’ and susceptible cv. ‘Désirée’ in the glasshouse during the first experiment.

Figure showing the mean number of different developmental stages of Globodera rostochiensis, of ‘HAR1’ and ‘Ecosse’ populations in resistant cv. ‘Laura’ and susceptible cv. ‘Désirée’ in the glasshouse in the second experiment.

Mean reproduction factor (±SE) of six populations of Globodera rostochiensis from Kenya on the susceptible cultivar ‘Désirée’ for three successive generations without diapause. Vertical bars show the standard error of the mean (n = 6). Means within a population with the same small letter are not significantly different (p > 0.05).

Percentage hatch of Globodera rostochiensis ‘HAR1’ population in PRD for three successive generations of cysts without diapause. Vertical bars are mean percentage ± standard error (n = 4).

Response of seven potato cultivars to four populations of Globodera rostochiensis under greenhouse conditions_

Cultivar	‘Ecosse’	‘HAR2’	‘KIN1’	‘TGN’
Experiment 1
‘Désirée’	28.43^d ± 12.0^a,A	14.73 ± 9.6^a,B	24.97 ± 10.5^a,A	37.27 ± 22.7^a,A
‘Connect’	31.70 ± 9.3^a,A	18.43 ± 5.2^a,B	30.84 ± 15.3^a,A	21.80 ± 9.4^a,A
‘Performer’	2.37 ± 1.3^b,A	1.74 ± 1.3^bA,B	2.45 ± 1.9^b,AB	1.18 ± 0.9^b,B
‘Rossini’	0.02 ± 0.1^c	0.00 ± 0.0^c	0.00 ± 0.0^c	0.01 ± 0.0^c
‘Caruso’	0.02 ± 0.1^c	0.00 ± 0.0^c	0.00 ± 0.0^c	0.02 ± 0.1^c
‘Amanda’	0.00 ± 0.0^c	0.01 ± 0.0^c	0.02 ± 0.1^c	0.05 ± 0.1^c
‘Laura’^e	0.00 ± 0.0	0.00 ± 0.0	0.00 ± 0.0	0.00 ± 0.0
Experiment 2
‘Désirée’	10.07 ± 1.5^a,A	8.11 ± 1.5^a,A	3.53 ± 0.3^a,B	12.92 ± 0.8^a,A
‘Connect’	7.47 ± 1.1^a,A	13.31 ± 1.9^a,A	2.42 ± 0.3^a,B	12.25 ± 2.7^a,A
‘Performer’	0.53 ± 0.1^b,AB	0.35 ± 0.1^b,B	0.85 ± 0.2^b,A	1.00 ± 0.3^b,A
‘Rossini’	0.00 ± 0.0^c	0.00 ± 0.0^c	0.04 ± 0.1^c	0.01 ± 0.0^c
‘Caruso’	0.00 ± 0.0^c	0.08 ± 0.3^c	0.00 ± 0.0^c	0.02 ± 0.1^c
‘Amanda’	0.00 ± 0.0^c	0.00 ± 0.0^c	0.00 ± 0.0^c	0.05 ± 0.0^c
‘Laura’^e	0.00 ± 0.0	0.00 ± 0.0	0.00 ± 0.0	0.00 ± 0.0

Response of seven potato cultivars to ‘HAR1’ and ‘Ecosse’ populations of Globodera rostochiensis under glasshouse conditionsa_

	‘HAR1’			‘Ecosse’
Cultivars	Rf ± se	RS (%)	Score	Rf ± se	RS (%)	Score
‘Désirée’	56.56 ± 8.51*	100	1	51.07 ± 4.37*	100	1
‘Albatros’	0.09 ± 0.07	0.16	9	0.02 ± 0.02	0.04	9
‘Belana’	0.10 ± 0.05	0.18	9	0.00 ± 0.00	0.00	9
‘Ribera’	0.08 ± 0.03	0.14	9	0.00 ± 0.00	0.00	9
‘Amado’	0.00 ± 0.00	0.00	9	0.00 ± 0.00	0.00	9
‘Seresta’	0.00 ± 0.00	0.00	9	0.00 ± 0.00	0.00	9
‘Papageno’	0.01 ± 0.02	0.02	9	0.00 ± 0.00	0.00	9

The reproduction factor (Rf) of Globodera rostochiensis populations ‘HAR1’ and ‘Ecosse’ on six differential potato clonesa_

		Population		Status^c
Potato clones	Resistance^b	‘HAR1’	‘Ecosse’	‘HAR1’	‘Ecosse’
S. tuberosum cv. ‘Désirée’	None	61.4	46.6	+	+
S. tuberosum cv. ‘Laura’	Ro1,4	0.0	0.0	–	–
S. kurtzianum, 60.21.19	Ro1,2	1.1	0.4	+	–
S. vernei, 58.1642.4	Ro1,2,3	0.1	0.1	–	–
S. vernei, 62.33.3	Ro1,2,3,4	3.2	2.4	+	+
S. vernei, 65.346.19	Ro1,2,3,4,5	0.0	0.0	–	–

Mean relative susceptibility (Rs %) of six potato cultivars to four G_ rostochiensis populations: ‘Ecosse’, ‘HAR2’, ‘KIN1’, and ‘TGN’a_

	‘Ecosse’		‘HAR2’		‘KIN1’		‘TGN’
Cultivar	Rs (%)^a	Score	Rs (%)	Score	Rs (%)	Score	Rs (%)	Score
‘Connect’	92.9	2	144.6	1	96.1	2	76.7	2
‘Performer’	6.8	6	8.1	6	17.0	4	5.5	6
‘Rossini’	0.1	9	0.0	9	0.6	9	0.1	9
‘Caruso’	0.1	9	0.5	9	0.0	9	0.2	9
‘Amanda’	0.0	9	0.1	9	0.1	9	0.3	9
‘Laura’^b	0.0	9	0.0	9	0.0	9	0.0	9

DOI: https://doi.org/10.21307/jofnem-2021-003 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X

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Language: English

Page range: 1 - 3

Published on: Jan 1, 2021

Published by: Society of Nematologists, Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

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© 2021 James M. Mwangi, Grace N. Mwangi, Maria R. Finckh, Sebastian Kiewnick, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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Biology, pathotype, and virulence of Globodera rostochiensis populations from Kenya

Figures & Tables

Figure 1:

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Figure 4:

Response of seven potato cultivars to four populations of Globodera rostochiensis under greenhouse conditions_

Response of seven potato cultivars to ‘HAR1’ and ‘Ecosse’ populations of Globodera rostochiensis under glasshouse conditionsa_

The reproduction factor (Rf) of Globodera rostochiensis populations ‘HAR1’ and ‘Ecosse’ on six differential potato clonesa_

Mean relative susceptibility (Rs %) of six potato cultivars to four G_ rostochiensis populations: ‘Ecosse’, ‘HAR2’, ‘KIN1’, and ‘TGN’a_

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