Reação de cultivares de braquiária (<i>Urochloa</i> spp.) à espécies de <i>Pyricularia</i> associadas à brusone

Krug, Loane D.; Moreira, Suellen de S.; Vicentini, Samara N. C.; Nunes, Tiago C.; Gonçalves, Lucas M. de D. P.; Castroagudín, Vanina L.; Barrios, Sanzio C. L.; Ceresini, Paulo C.

doi:10.1590/1983-21252024v3712127rc

Loane D. Krug ^* * Corresponding author: loane.krug@unesp.br

Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil

https://orcid.org/0000-0003-3051-3897

Suellen de S. Moreira

Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil

https://orcid.org/0009-0001-0680-3109

Samara N. C. Vicentini

Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil

https://orcid.org/0000-0003-0383-4097

Tiago C. Nunes

Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil

https://orcid.org/0000-0002-1446-811X

Lucas M. de D. P. Gonçalves

Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil

https://orcid.org/0009-0000-4828-6421

Vanina L. Castroagudín

Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil

https://orcid.org/0000-0002-4843-5754

Sanzio C. L. Barrios

Embrapa Gado de corte, Campo Grande, MS, Brazil

https://orcid.org/0000-0002-5490-4959

Paulo C. Ceresini

Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil

https://orcid.org/0000-0003-2381-2792

* Corresponding author: loane.krug@unesp.br

Conflict of interest: The authors declare no conflict of interest related to the publication of this manuscript.

Species, isolate	Host	Virulence group^a (Race)	State
Pyricularia oryzae Triticum Lineage (PoTl): N = 13
12.0.007i	Signal grass (Urochloa brizantha)	A	PR
12.0.012i	Signal grass	A	PR
12.1.026	Wheat (Triticum aestivum)	A	DF/GO
12.1.003	Wheat	A	MG
12.1.037	Wheat	B	DF/GO
12.1.016	Wheat	B	MG
12.1.077	Wheat	C	MG
12.1.195	Wheat	C	RS
12.1.058	Wheat	D	DF/GO
12.1.187	Wheat	D	RS
12.0.535i	Southern sandbur (Cenchrus echinatus)	AA	PR
12.0.147	Signal grass	CC	MS
12.0.016	Weeping finger grass (Chioris distichophylla)	DD	MS
Pyricularia pennisetigena (Pp): N = 2
12.0.324	Southern sandbur (C. echinatus)	n.d.	MS
12.0.358	Green panic grass (Panicum maximum)	n.d.	MS
Pyricularia urashimae (Pu): N = 2
12.0.212	Green panic grass (P. maximum)	n.d.	MS
12.0.595i	Weeping finger grass (C. distichophylla)	n.d.	PR
Pyricularia grisea (Pg): N = 2
12.0.264	Crabgrass (Digitaria sanguinalis)	n.d.	MS
13.0.002i	Crabgrass (D. sanguinalis)	n.d.	PR

Percentage of infected leaf area	Disease severity index^* * Disease severity index determined using the diagrammatic scale from the International Network for Genetic Evaluation of Rice (1996), adapted for Brachiaria.	Reaction of cultivars
0%	0	Resistant
0.1 to 4%	1	Resistant
4.1 to 10%	2	Susceptible
10.1 to 25%	3	Susceptible
25.1 to 50%	4	Susceptible
50.1 to 100%	5	Susceptible

Source of variation	Df	MS	F Statistics	P
Block	9	16.13	1.87	0.0525^ns
Pyricularia Species^* * As there was no significant effect of the interactions between experiment replicates and the species or cultivar factors, the two experiments with N = 5 repetitions each were combined for joint analysis of the experiments.	3	78.93	9.14	0.000^* ** significant differences at 1% by the F test.*
Cultivar^* * As there was no significant effect of the interactions between experiment replicates and the species or cultivar factors, the two experiments with N = 5 repetitions each were combined for joint analysis of the experiments.	8	280.60	32.49	0.000^* ** significant differences at 1% by the F test.*
Species ^* * As there was no significant effect of the interactions between experiment replicates and the species or cultivar factors, the two experiments with N = 5 repetitions each were combined for joint analysis of the experiments. Cultivar	24	31.92	3.70	0.000^* ** significant differences at 1% by the F test.*
Error	1755	8.64

Pyricularia species and disease severity index (% of affected leaf area)
				Varieties of Urochloa spp.
Basilisk	Humidicola	BRS Ipyporã	Marandu	BRS Paiaguás	BRS Piatã	Ruziziensis	BRS Tupi	Xaraés	Mean ^ Mean of Urochloa cultivars per Pyricularia species (± standard deviation). (± standard deviation)
			Pyricularia oryzae Triticum lineage (PoTl), N=13
1.578 cB	1.648 cB	0.686 dA	1.732 cB	2.910 bB	2.314 bA	4.022 aA	0.577 dA	0.404 dA	1.763 ± 1.115
				Pyricularia pennisetigena (Pp), N=2
3.656 bA	2.536 cB	0.627 cA	4.950 aA	5.747 a A	1.455 cA	3.715 bA	1.098 cA	0.000 cA	2.643 ± 1.885
				Pyricularia grísea (Pg), N=2
1.314 cB	5.743 aA	1.792 cA	2.261 cB	5.746 aA	0.565 cA	3.698 bA	1.102 cA	1.225 cA	2.605 ± 1.876
			Pyricularia urashimae (Pu), N=2
2.050 aA	1.589 aB	0.000 bA	1.347 aB	2.601 aB	2.498 aA	2.706 aA	0.954 bA	0.000 bA	1.527 ±0.988
			Average of Pyricularia species per cultivar (± standard deviation)
2.150 ±0.909	2.879 ± 1.696	0.776 ± 0.645	2.573 ±1.410	4.251 ± 1.499	1.708 ±0.768	3.535 ±0.496 0.933 ±0.214		0.500 ± 0.407

Source of variation	Df	MS	F Statistics	P
Block	9	8.35	1.47	0.154^ns
Pyricularia Species^* * Since there was no significant effect of the interactions between experiment replicates and race or cultivar factors, the two experiments with N = 5 repetitions each were combined for a joint analysis of the experiments.	7	80.99	14.25	0.000^ Significant differences at 1% by F test.
Cultivar^* * Since there was no significant effect of the interactions between experiment replicates and race or cultivar factors, the two experiments with N = 5 repetitions each were combined for a joint analysis of the experiments.	8	195.22	34.35	0.000^ Significant differences at 1% by F test.
Species ^* * Since there was no significant effect of the interactions between experiment replicates and race or cultivar factors, the two experiments with N = 5 repetitions each were combined for a joint analysis of the experiments. Cultivar	56	24.65	4.37	0.000^ Significant differences at 1% by F test.
Error	1179	5.68

Race	N^ Number of isolates of each race.	Basilisk	Humidicola	BRS Ipyporã	Marandu	Paiaguás	BRS Piatã	Ruziziensis	BRS Tupi	Xaraés	Total of resistance reactions (R)
A	4	R	R	R	R	R	R	R	R	R	9
B	2	R	R	R	R	R	R	S	R	R	8
C	2	R	R	R	R	S	R	S	R	R	7
D	2	R	R	R	R	S	S	R	R	R	7
AA	1	R	R	R	R	R	R	R	R	R	9
CC	1	R	R	R	R	R	R	R	R	R	9
DD	1	R	R	R	R	R	R	R	R	R	9
Total	1	7	7	7	7	5	6	5	7	7	-

Reação de cultivares de braquiária (Urochloa spp.) à espécies de Pyricularia associadas à brusone

RESUMO