Selection of processing tomato genotypes resistant to two spotted spider mite

Zanin, Daniel S; Resende, Juliano TV; Zeist, André R; Oliveira, João RF; Henschel, Juliane M; Lima Filho, Renato B

doi:10.1590/S0102-053620180221

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Scientific communication • Hortic. Bras. 36 (2) • Apr-Jun 2018 • https://doi.org/10.1590/S0102-053620180221 copy

Selection of processing tomato genotypes resistant to two spotted spider mite

Seleção de genótipos de tomateiro para processamento, resistentes ao ácaro-rajado

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

One of the major problems in cultivation of tomato is the occurrence of pests and diseases. The objective of the research was to select genotypes from the second generation of the first backcross (F₂BC₁) between the tomato cultivar for processing S. lycopersicum (cv. Redenção) and the wild access S. habrochaites var. hirsutum (PI-127826), with high levels of zingiberene (ZGB), resistant to the twospotted spider mite Tetranychus urticae (Acari: Tetranychidae). From the F₂BC₁ population. The ZGB content was quantified and five plants with high zingiberene selected (RVTZ 2011-079-117, RVTZ 2011-079-185, RVTZ 2011-079-335, RVTZ 2011-079-345 and RVTZ 2011-079-503) and four with low zingiberene content (RVTZ 2011-079-417, RVTZ 2011-331-460, RVTZ 2011-079-538 and RVTZ 2011-079-548) were selected. Genotypes selected for high and low ZGB content and the parentals S. habrochaites var. hirsutum access PI-127826 and ‘Redenção’ were evaluated for repellency to the twospotted spider mite. There was a significant and inverse correlation between ZGB content and average distances travelled by mites on tomato leaflets. The genotypes of the F₂BC₁ generation with high zingiberene levels RVTZ 2011-079-117, RVTZ 2011-079-185, RVTZ 2011-079-335, RVTZ 2011-079-345 and RVTZ 2011-079-503 are promising for progress in achieving resistant lines to arthropod pests. Among them RVTZ 2011-079-117 stands out for resistance to twospotted spider mite.

Keywords:
Solanum lycopersicum; Solanum habrochaites var. hirsutum; Tetranychus urticae; genetic breeding; zingiberene

Genotype	Zingiberene content (Abs)¹	Travelled distance (mm)
Genotype	Zingiberene content (Abs)¹	20 min	40 min	60 min
S. habrochaites PI-127826	0.338	1.22 a²	2.22 a	2.70 a
RVTZ 2011-079-117 (high)	0.216	2.46 b	3.83 a	5.24 b
RVTZ 2011-079-185 (high)	0.346	3.10 b	3.64 a	4.83 b
RVTZ 2011-079-335 (high)	0.216	4.71 b	6.28 a	7.72 b
RVTZ 2011-079-345 (high)	0.197	1.95 a	1.80 a	2.56 a
RVTZ 2011-079-503 (high)	0.285	1.30 a	2.22 a	2.66 a
RVTZ 2011-079-417 (low)	0.038	15.19 c	16.26 b	17.26 c
RVTZ 2011-331-460 (low)	0.039	21.63 c	21.88 b	22.95 c
RVTZ 2011-331-538 (low)	0.029	14.94 c	19.77 b	19.71 c
RVTZ 2011-331-548 (low)	0.025	22.86 c	26.14 c	27.39 d
S. lycopersicum cv. Redenção	0.103	33.58 d	32.46 c	34.90 d
CV (%)	84.56	28.63	24.87	24.94
Correlation with ZGB content		-0.82 ^**	-0.83 ^**	-0.83 ^**
Comparison of contrast of interest estimative		20 min	40 min	60 min
Genotypes high vs. genotypes low		-14.60 ^**	-15.96 ^**	-15.98 ^**
PI-127826 vs. genotypes high		-2.83 ^ns	-2.84 ^ns	-3.15 ^ns
PI-127826 vs. genotypes low		-17.44 ^**	-18.79 ^**	-19.13 ^**
Redenção vs. genotypes high		29.53 ^**	27.41 ^**	29.05 ^**
Redenção vs. Genotypes low		14.92 ^**	11.45 ^**	13.07 ^**

Associação Brasileira de Horticultura Embrapa Hortaliças, C. Postal 218, 70275-970 Brasília-DF, Tel. (61) 3385 9099, Tel. (81) 3320 6064, www.abhorticultura.com.br - Vitoria da Conquista - BA - Brazil
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[TFN3] ¹ZGB content at 270 nm; ²Means followed by same letters in the column belong to the same group, Scott-Knott test, p<0,05; ^**significant correlation, Student t test, p<0,01; ^**significant contrast by Scheffé test, p<0.01; ^nsnot significant.