Tomato genotypes with determinate growth and high acylsugar content presenting resistance to spider mite

Maciel, Gabriel Mascarenhas; Marquez, Guilherme Repeza; Silva, Ernani Clarete da; Andaló, Vanessa; Belloti, Igor Forigo

doi:10.1590/1984-70332018v18n1a1

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Crop Breeding and Applied Biotechnology

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ARTICLE • Crop Breed. Appl. Biotechnol. 18 (1) • Jan-Mar 2018 • https://doi.org/10.1590/1984-70332018v18n1a1 copy

Tomato genotypes with determinate growth and high acylsugar content presenting resistance to spider mite

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Currently, the main control strategy for arthropod-pests in tomato cropping is the use of synthetic chemical insecticides and miticides. The study aimed to select tomato genotypes of Santa Cruz type, with determinate growth habit, which were rich in acylsugar and presented resistance to spider mite. The evaluated segregating populations were derived from interspecific crossing and were in the advanced generation F₂BC₂. Genotypes were assessed for acylsugars content, present in leaflets, trichomes at abaxial and adaxial parts and a repellence bioassay to the mite was performed. It was found that the genotype UFU-102-F₂BC₂#13 stood out in comparison to the others, showing determinate growth habit, high acylsugar content and resistance to spider mite. It was also possible to obtain genotypes that were similar to the wild specie S. pennellii, regarding the acylsugar content.

Key words:
Allelochemical; biotic stress; growth habit; self-pruning gene; Tetranychus urticae

	Genotype¹	[ ] acylsugar	RS³ (%)
	Genotype¹	(nmoL cm^-2 of foliar area)	to LA-716	to UFU-040
T1	UFU-96-F₂BC₁#4	24.4 ab	-18.39	54.43
T2	UFU-102-F₂BC₁#8	25.1 ab	-16.05	58.86
T3	UFU-75-F₂BC₁#4	16.8 b	-43.81	6.33
T4	UFU-97-F₂BC₁#1	20.6 ab	-31.10	30.38
T5	UFU-76-F₂BC₁#2	18.5 b	-38.13	17.09
T6	UFU-96-F₂BC₁#2	18.2 b	-39.13	15.19
T7	UFU-97-F₂BC₁#2	19.2 ab	-35.79	21.52
T8	UFU-104-F₂BC₁#7	19.9 ab	-33.44	25.95
T9	UFU-113-F₂BC₁#2	17.8 b	-40.47	12.66
T10	UFU-114-F₂BC₁#2	20.2 ab	-32.44	27.85
T11	UFU-040	15.8 b	-47.16	0.00
T12	LA-716	29.9 a	0.00	89.24
	CV (%)	17.5
	Contrasts²	Contrasts of interest
C1	(T11) - (T1+ … +T10)/10	-4.27^*
C2	(T12) - (T1+ … +T10)/10	9.83^**
C3	(T11) - (T1+T2+T4)/3	-7.23^*
C4	(T12) - (T1+T2+T4)/3	6.53^*

Genotypes/Treatments	Description
UFU-96-F₂BC₂#2	Genotype selected F₂BC₂, from the interspecific cross between Solanum pennellii versus Solanum lycopersicum (UFU-040). (homozygous recessive (spsp) for self-pruning).
UFU-96-F₂BC₂#7	Genotype selected F₂BC₂, from the interspecific cross between Solanum pennellii versus Solanum lycopersicum (UFU-040). (homozygous recessive (spsp) for self-pruning).
UFU-97-F₂BC₂#4	Genotype selected F₂BC₂, from the interspecific cross between Solanum pennellii versus Solanum lycopersicum (UFU-040). (homozygous recessive (spsp) for self-pruning).
UFU-040	Pre-commercial lineage with low acylsugar content (A.A). (homozygous recessive (spsp) for self-pruning) genotypic background similar to Santa Clara cultivar.
UFU-102-F₂BC₂#8	Genotype selected F₂BC₂, from the interspecific cross between Solanum pennellii versus Solanum lycopersicum (UFU-040). (homozygous recessive (spsp) for self-pruning).
UFU-102-F₂BC₂#15	Genotype selected F₂BC₂, from the interspecific cross between Solanum pennellii versus Solanum lycopersicum (UFU-040). (homozygous recessive (spsp) for self-pruning).
UFU-102-F₂BC₂#13	Genotype selected F₂BC₂, from the interspecific cross between Solanum pennellii versus Solanum lycopersicum (UFU-040). (homozygous recessive (spsp) for self-pruning).
Santa Clara	Commercial cultivar Santa Clara with low acylsugar content.
Solanum pennellii	Wild accession LA-716 with high acylsugar content and indeterminate growth habit (homozygous dominant (SPSP) for self-pruning).

		Glandular trichome type I, IV, VI and VII cm^-2 (Glas et al. 2012Glas JJ, Schimmel BC, Alba JM, Escobar-bravo R, Schuurink RC and Kant MR (2012) Plant glandular trichomes as targets for breeding or engineering of resistance to herbivores. International Journal of Molecular Sciences 13: 17077-17103. )		[ ] acylsugars (Resende et al. 2002Resende JTV, Cardoso MG, Maluf WR, Santos CD, Gonçalves LD, Resende LV and Naves FO (2002) Método colorimétrico para quantificação de acilaçúcar em genótipos de tomateiro. Ciência e Agrotecnologia 26: 1204-1208.)	RS³ in relation to acylsugar content (%)
	Genotype¹	Abaxial	Adaxial	(nmoL cm^-2 of foliar area)	LA-716	UFU-040
T1	UFU-96-F₂BC₂#2	1.2c	2.5bcd	15.43b	-49.33	-11.17
T2	UFU-96-F₂BC₂#7	3.4bc	1.4cd	19.37b	-36.39	11.51
T3	UFU-97-F₂BC₂#4	1.6c	4.7b	16.38b	-46.21	-5.70
T4	UFU-040	1.9c	0.9d	17.37b	-42.96	0.00
T5	UFU-102- F₂BC₂#8	5.6bc	4.5b	14.14b	-53.56	-18.60
T6	UFU-102- F₂BC₂#15	6.8b	4.3b	18.30b	-39.90	5.35
T7	UFU-102- F₂BC₂#13	5.4bc	3.9bc	28.68a	-5.81	65.11
T8	cv. Santa Clara	2.1c	2.4cd	12.81b	-57.93	-26.25
T9	Solanum pennellii	84.0a	76.4a	30.45a	0.00	75.30
	CV (%)	9.13	5.94	8.48
	Contrasts²	Contrasts of interest
C1	(T9) - (T1+ ... +T7)/6	80.0^**	72.0^**	11.73^**
C2	[(T8+T4)/2]- [(T1+ ... +T7)/6]	2.0	-2.3	-3.62
C3	(T7) - (T4+T8)/2	1.4	2.2	11.59^*

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[1] *Corresponding author: E-mail: gabrielmaciel@ufu.br