Productivity, acylsugar concentrations and resistance to the two-spotted spider mite in genotypes of salad tomatoes

Peixoto, Joicy V. M.; Ribeiro, Ana L. A.; Maciel, Gabriel M.; Oliveira, Camila S. de; Finzi, Rafael R.; Moraes, Emmerson R. de

doi:10.1590/1807-1929/agriambi.v24n9p596-602

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Articles • Rev. bras. eng. agríc. ambient. 24 (9) • Sept 2020 • https://doi.org/10.1590/1807-1929/agriambi.v24n9p596-602 copy

Productivity, acylsugar concentrations and resistance to the two-spotted spider mite in genotypes of salad tomatoes

Produtividade, teor de acilaçúcares e resistência ao ácaro rajado de genótipos de tomateiro tipo salada

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The objective of this study was to characterize genotypes of the salad-type tomato with a determinate growth habit and select genotypes resistant to the two-spotted spider mite for higher productivity and fruit quality. The experiment was conducted at the Horticultural Experimental Station (18°42’43.19” S and 47°29’55.8” W, 873 m altitude) of the Universidade Federal de Uberlândia (UFU), Monte Carmelo campus, from January to June 2018. The experimental design was in randomized blocks containing 16 treatments [12 populations of the F₃RC₂ generation and four controls: two commercial cultivars (Santa Clara and Rio Grande), the recurrent parent (UFU-057) and the wild species Solanum pennellii (LA-716)] with three repetitions. The accessions UFU-057F₃RC₂10#3.6.1 and UFU-057F₃RC₂13#2.1.2 have high potential for genetic improvement regarding resistance to the two-spotted spider mite. The genotypes UFU-13#4.4.1, UFU-7#4.7.1, UFU-7#4.3.2, UFU-13#2.5.2 and UFU-13#2.1.3 present higher acylsugar concentrations than S. pennellii, in addition to higher productivity and number of fruits per plant. It is suggested to explore combinations between those genotypes previously described with UFU-8#2.4.1 to obtain hybrids with high acylsugar concentrations, two-spotted spider mite resistance, high productivity and increased fruit mass.

Key words:
Solanum lycopersicum L.; Tetranychus urticae; biotic stress; allelochemicals

Genotype^a	CA (nmols cm^-2)	RS (%) to LA-716	GT (I, IV, VI and VII) (nmol cm^-2)		Prod (kg)	NFP	FM (g)^b	SS (°Brix)	TTA (%)^c	SS/TTA	pH	ACA (%)^c
Genotype^a	CA (nmols cm^-2)	RS (%) to LA-716	Adaxial	Abaxial	Prod (kg)	NFP	FM (g)^b	SS (°Brix)	TTA (%)^c	SS/TTA	pH	ACA (%)^c
1	39.33 b	33.42	1.58 d	1.13 b	0.26 b	8.81 b	29.90 e	4.86 e	0.76 b	6.39 a	4.06 a	0.49 b
2	33.00 c	12.20	9.79 b	4.83 b	0.29 b	12.00 b	25.30 e	6.73 b	0.87 b	7.77 a	4.18 a	0.56 b
3	30.67 d	3.54	2.08 d	1.50 b	0.15 b	7.00 b	20.59 e	6.01 c	0.84 b	7.29 a	4.10 a	0.54 b
4	33.33 c	13.76	1.50 d	1.29 b	0.65 a	8.17 b	81.86 a	4.66 e	0.74 b	6.37 a	4.18 a	0.47 b
5	45.67 a	54.82	3.38 d	0.83 b	0.50 a	13.25 a	39.63 d	5.61 d	0.84 b	6.72 a	4.09 a	0.53 b
6	36.33 c	23.05	1.00 d	2.04 b	0.50 a	22.00 a	22.47 e	5.58 d	0.73 b	7.85 a	4.01 a	0.47 b
7	41.00 b	38.97	4.29 d	4.33 b	0.52 a	15.08 a	34.54 d	6.25 c	0.99 a	6.40 a	4.03 a	0.63 a
8	33.33 c	13.58	2.58 d	1.63 b	0.32 b	6.17 b	50.54 c	5.33 d	0.67 b	8.08 a	4.31 b	0.43 b
9	38.00 b	28.86	1.75 d	1.96 b	0.76 a	12.92 a	59.14 b	5.56 d	0.86 b	6.65 a	4.09 a	0.55 b
10	45.67 a	54.51	6.75 c	3.50 b	0.49 a	11.08 b	44.41 c	5.94 c	0.81 b	7.50 a	4.11 a	0.52 b
11	30.67 d	3.46	0.88 d	0.42 b	0.68 a	18.44 a	37.03 d	6.05 c	0.73 b	8.35 a	4.35 b	0.47 b
12	32.33 c	9.64	0.71 d	1.04 b	0.62 a	14.25 a	45.12 c	5.21 d	0.62 b	8.98 a	4.35 b	0.40 b
13	21.67 e	-26.67	1.17 d	1.67 b	0.64 a	9.83 b	65.63 b	4.89 e	0.78 b	6.29 a	4.14 a	0.50 b
14	11.66 f	-61.33	2.13 d	2.63 b	0.85 a	16.58 a	50.31 c	5.46 d	0.67 b	8.21 a	4.19 a	0.43 b
15	24.33 e	-16.81	0.88 d	1.38 b	0.73 a	15.36 a	46.84 c	5.10 e	0.73 b	7.03 a	4.23 b	0.46 b
16	29.67 d	-	33.42 a	29.42 a	0.01 b	8.83 b	1.35 f	7.57 a	1.31 a	6.47 a	4.09 a	0.84 a
Ks	0.20		0.20	0.01	0.20	0.20	0.20	0.20	0.20	0.20	0.16	0.20
F	0.03		0.001	0.00	0.06	0.10	0.09	0.12	0.01	0.04	0.00	0.01
F’	0.19		0.03	0.29	0.88	0.87	0.01	0.11	0.23	0.70	0.07	0.23

Genotypes	Time (min)				Overall average¹
Genotypes	5	10	15	20	Overall average¹
UFU-057F₃RC₂10#3.6.1	0.75	0.92	0.77	0.33	0.69 a
UFU-057F₃RC₂7#4.3.2	1.53	1.62	1.52	0.83	1.38 b
UFU-057F₃RC₂7#4.7.3	1.73	1.70	0.53	0.77	1.18 b
UFU-057F₃RC₂8#2.4.1	1.65	0.98	1.28	1.68	1.40 b
UFU-057F₃RC₂13#4.4.1	0.88	1.22	0.62	1.47	1.05 b
UFU-057F₃RC₂7#4.7.1	1.50	1.20	1.23	0.97	1.23 b
UFU-057F₃RC₂7#4.3.2	1.13	1.08	0.83	1.28	1.08 b
UFU-057F₃RC₂13#2.1.1	1.07	1.83	1.03	1.12	1.26 b
UFU-057F₃RC₂13#2.5.2	1.28	1.87	1.82	0.35	1.33 b
UFU-057F₃RC₂13#2.5.1	1.37	1.23	0.93	1.13	1.17 b
UFU-057F₃RC₂13#2.1.2	1.45	0.83	0.88	0.32	0.87 a
UFU-057F₃RC₂13#2.1.3	1.80	1.57	0.43	0.92	1.18 b
UFU-057	1.47	1.60	1.53	1.08	1.42 b
Santa Clara	2.70	1.95	1.05	2.03	1.93 b
Rio Grande	1.30	2.07	1.32	1.33	1.50 b
Solanum pennellii	0.00	0.22	0.07	0.00	0.07 a
Linear Regression	ns
Ks					0.01
F					0.00
F’					0.35

Group	Genotypes
I	UFU-057F₃RC₂10#3.6.1, UFU-057F₃RC₂7#4.3.2, UFU-057F₃RC₂7#4.7.3, UFU-057F₃RC₂8#2.4.1, UFU-057F₃RC₂13#4.4.1, UFU-057F₃RC₂7#4.7.1, UFU-057F₃RC₂7#4.3.2, UFU-057F₃RC₂13#2.1.1, UFU-057F₃RC₂13#2.5.2, UFU-057F₃RC₂13#2.5.1, UFU-057F₃RC₂13#2.1.2, UFU-057F₃RC₂13#2.1.3, UFU-057, and Santa Clara e Rio Grande
II	Solanum pennellii

Variable	S.j (%)
Number of trichomes on the adaxial face of the leaf	32.32
Concentration of acylsugar (nmol cm^-2)	16.96
Average fruit mass (g)	15.32
Soluble solids concentration (°Brix)	11.83
Acidity of citric acid (%)	6.52
Productivity of fruits (kg per plant)	6.48
Titratable total acidity (%)	5.22
pH	2.38
Number of trichomes on the abaxial face of the leaf	0.90
Number of fruits per plant	0.80
Distance travelled by the mite Tetranychus urticae	0.72
Ratio between the soluble solids concentration and the titratable total acidity	0.53

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[1] Joicy V. M. Peixoto - E-mail: joicyvmpeixoto@yahoo.com.br (Corresponding author)