Resistance of common bean lines to <i>Sclerotinia sclerotiorum</i> isolates under different environmental conditions

Abreu, Mariana Junqueira de; Leite, Monik Evelin; Ferreira, Alex Naves; Pereira, Rafael; Pereira, Fernanda Aparecida Castro; Souza, Elaine Aparecida de

doi:10.1590/S1678-3921.pab2022.v57.02877

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Phytopathology/ Original Article • Pesq. agropec. bras. 57 • 2022 • https://doi.org/10.1590/S1678-3921.pab2022.v57.02877 copy

Resistance of common bean lines to Sclerotinia sclerotiorum isolates under different environmental conditions

Resistência de linhagens de feijoeiro-comum a isolados de Sclerotinia sclerotiorum em diferentes condições ambientais

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this work was to evaluate the reaction of common bean (Phaseolus vulgaris) lines to Sclerotinia sclerotiorum, the aggressiveness of the isolates, and the inheritance of resistance to white mold, under two environmental conditions. The experiments were carried out under field and greenhouse conditions. In each one, four isolates were inoculated in 14 common bean lines using the straw-test inoculation method and severity on plants. No common bean line with a high level of resistance to white mold was identified, and most of the lines were moderately resistant to the pathogen. In general, the BRS Campeiro, BRS Radiante, BRSMG Talismã, and Ouro Negro cultivars stand out for resistance. Under field conditions, the UFLA 3 isolate discriminates well the lines, while, under greenhouse conditions, UFLA 26 and UFLA 92 are the most aggressive isolates. Furthermore, according to the genetic study, most of the observed variation can be attributed to horizontal resistance, although a small part is associated with vertical resistance.

Index terms
Phaseolus vulgaris ; diallel analysis; white mold

Source of variation	Severity of white mold
Source of variation	Degree of freedom	Mean square
Common bean lines (L)	13	2.09^ns ns Nonsignificant.
Environments (E)	1	40.82^ Significant by the F-test, at 1% probability.
Isolates (I)	3	64.41^ Significant by the F-test, at 1% probability.
L x E	13	2.22^ns ns Nonsignificant.
L x I	39	1.35^ns ns Nonsignificant.
E x I	3	77.88^ Significant by the F-test, at 1% probability.
L x E x I	39	0.96^ns ns Nonsignificant.
Error	110	0.5
Severity mean (± SD)⁽¹ (1) Determined on the basis of a diagrammatic scale from 1 to 9 (Terán et al., 2006). SD, standard deviation. ⁾		4.39 (±0.54)
Coefficient of variation (%)		16.12

Common bean line	UFLA 3 isolate		UFLA 26 isolate		UFLA 54 isolate		UFLA 92 isolate		Means of lines⁽²⁾
Common bean line	Field	GH	Field	GH	Field	GH	Field	GH	Field	GH
BRSMG Majestoso	3.6 C	3.4 A	5.9 A	6.8 A	4.8 A	4.9 A	2.1 A	6.5 A	4.1	5.4
BRSMG Uai	5.6 A	4.1 A	5.4 A	6.3 A	4.9 A	3.7 B	2.3 A	5.8 A	4.6	5.0
BRS Radiante	4.3 B	3.0 A	5.4 A	4.7 B	4.5 A	4.7 A	1.9 A	4.3 B	4.0	4.2
BRS Esplendor	3.8 C	3.4 A	5.1 A	6.3 A	4.5 A	4.4 A	1.7 A	5.6 A	3.8	4.9
BRS VALENTE	3.6 C	3.6 A	4.9 A	5.8 B	5.6 A	3.8 B	1.9 A	5.7 A	4.0	4.7
Ouro Negro	3.9 C	3.4 A	5.7 A	5.0 B	5.6 A	4.8 A	1.9 A	3.3 B	4.3	4.1
BRS Campeiro	4.4 B	3.5 A	5.4 A	3.3 C	5.0 A	3.6 B	1.9 A	3.3 B	4.2	3.4
BRSMG Tesouro	3.8 C	3.5 A	4.9 A	5.1 B	4.8 A	3.8 B	2.1 A	6.3 A	3.9	4.7
BRSMG Talismã	2.5 C	3.1 A	5.2 A	5.3 B	5.2 A	3.8 B	1.9 A	4.9 A	3.7	4.3
BRSMG União	3.4 C	3.2 A	5.1 A	6.7 A	4.7 A	3.3 B	2.2 A	6.2 A	3.9	4.9
BRS 9435 Cometa	3.2 C	3.4 A	6.1 A	6.0 A	5.2 A	5.0 A	1.9 A	5.9 A	4.1	5.1
Pérola	3.5 C	3.6 A	6.4 A	5.3 B	4.8 A	4.9 A	1.9 A	6.8 A	4.2	5.2
BRS Estilo	4.2 B	3.5 A	4.8 A	5.0 B	4.9 A	5.4 A	1.8 A	6.7 A	3.9	5.2
RP2	3.4 C	3.4 A	4.9 A	7.0 A	5.4 A	5.2 A	2.3 A	6.0 A	4.0	5.4
Coefficient of variation (%)	14.7	14.6	16.1	16.0	12.6	17.1	21.7	15.6
Means of isolates⁽¹⁾	3.8	3.4	5.4	5.6	5	4.4	1.9	5.5
Standard deviation	0.71	0.26	0.49	1.00	0.36	0.69	0.18	1.15

Source of variance	Degree of freedom	Mean squares
Source of variance	Degree of freedom	Field	Greenhouse
GAA	3	97.1^ ,	45.2^ ,
GRA	13	0.59	3.71^ ,
SIA	39	0.71^* * Significant by the F-test, at 1% and 5% probability, respectively. Source of variance: GAA, general aggressiveness ability; GRA, general reaction ability; SIA, specific interaction ability.	1.58^ ,
Error	110	0.41	1.05
Severity means⁽¹⁾		4.04	4.74

Common bean line	Sclerotinia sclerotiorum isolate
	UFLA 3		UFLA 26		UFLA 54		UFLA 92
	Field	GH	Field	GH	Field	GH	Field	GH
BRSMG Majestoso	-0.27	-0.71	0.48	0.49	-0.24	-0.08	0.03	0.29
BRSMG Uai	1.30^ ,	0.41	-0.48	0.48	-0.59	-0.95^* * Significant at 1% and 5% probability by the t-student test.	-0.22	0.06
BRS Radiante	0.53	0.13	0.04	-0.33	-0.48	0.85^* * Significant at 1% and 5% probability by the t-student test.	-0.08	-0.64
BRS Esplendor	0.27	-0.19	-0.03	0.51	-0.2	-0.14	-0.04	-0.17
BRS VALENTE	-0.13	0.17	-0.44	0.21	0.62^* * Significant at 1% and 5% probability by the t-student test.	-0.56	-0.05	0.18
Ouro Negro	-0.08	0.61	0.06	-0.01	0.38	1.00^ ,	-0.35	-1.59^ ,
BRS Campeiro	0.44	1.37^ ,	-0.16	-0.97^* * Significant at 1% and 5% probability by the t-student test.	-0.12	0.48	-0.16	-0.89^* * Significant at 1% and 5% probability by the t-student test.
BRSMG Tesouro	0.08	0.09	-0.26	-0.44	-0.1	-0.53	0.28	0.88^* * Significant at 1% and 5% probability by the t-student test.
BRSMG Talismã	-0.94^ ,	0.1	0.12	0.06	0.54	-0.06	0.29	-0.1
BRSMG União	-0.24	-0.37	-0.09	0.95^* * Significant at 1% and 5% probability by the t-student test.	-0.07	-1.16^ ,	0.41	0.58
BRS 9435 Cometa	-0.68^* * Significant at 1% and 5% probability by the t-student test.	-0.34	0.66^* * Significant at 1% and 5% probability by the t-student test.	0.04	0.16	0.28	-0.14	0.02
Pérola	-0.43	-0.27	0.89^ ,	-0.69	-0.29	0.11	-0.18	0.85^* * Significant at 1% and 5% probability by the t-student test.
BRS Estilo	0.53	-0.35	-0.44	-1.03^ ,	-0.02	0.65	-0.07	0.73
RP2	-0.36	-0.66	-0.35	0.72	0.41	0.13	0.29	-0.19

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